February 2025 - Linux-kselftest-mirror

[PATCH] selftests: mptcp: connect: Use more formal wording in error message

by Marcelo Moreira

Update error message in mptcp_connect.sh to use a more formal and consistent wording. The phrase "not able to" was replaced with "Unable to" for better clarity. Signed-off-by: Marcelo Moreira <marcelomoreira1905(a)gmail.com> --- tools/testing/selftests/net/mptcp/mptcp_connect.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh index 5e3c56253274..bdc9c22af6be 100755 --- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh @@ -261,8 +261,8 @@ check_mptcp_disabled() # mainly to cover more code if ! ip netns exec ${disabled_ns} sysctl net.mptcp >/dev/null; then - mptcp_lib_pr_fail "not able to list net.mptcp sysctl knobs" - mptcp_lib_result_fail "not able to list net.mptcp sysctl knobs" + mptcp_lib_pr_fail "Unable to list net.mptcp sysctl knobs" + mptcp_lib_result_fail "Unable to list net.mptcp sysctl knobs" ret=${KSFT_FAIL} return 1 fi -- 2.48.1

4 months, 1 week

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[PATCH] Adds colors to kselftest output

by Marcelo Moreira

This commit improves the readability of kselftest results by adding ANSI color codes to the [ OK ] and FAIL messages. Signed-off-by: Marcelo Moreira <marcelomoreira1905(a)gmail.com> --- tools/testing/selftests/net/mptcp/mptcp_lib.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/mptcp/mptcp_lib.sh b/tools/testing/selftests/net/mptcp/mptcp_lib.sh index 051e289d7967..7b55855ff788 100644 --- a/tools/testing/selftests/net/mptcp/mptcp_lib.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_lib.sh @@ -83,7 +83,7 @@ mptcp_lib_print_err() { # shellcheck disable=SC2120 # parameters are optional mptcp_lib_pr_ok() { - mptcp_lib_print_ok "[ OK ]${1:+ ${*}}" + mptcp_lib_print_ok "\033[32m[ OK ]\033[0m${1:+ ${*}}" } mptcp_lib_pr_skip() { @@ -97,7 +97,7 @@ mptcp_lib_pr_fail() { title="IGNO" cmt=" (flaky)" else - title="FAIL" + title="\033[31mFAIL\033[0m" fi mptcp_lib_print_err "[${title}]${cmt}${1:+ ${*}}" -- 2.48.1

4 months, 1 week

3
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[PATCH v3 0/2] printf: convert self-test to KUnit

by Tamir Duberstein

This is one of just 3 remaining "Test Module" kselftests (the others being bitmap and scanf), the rest having been converted to KUnit. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 printf I have also sent out a series converting scanf[0]. Link: https://lore.kernel.org/all/20250204-scanf-kunit-convert-v3-0-386d7c3ee714@… [0] Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v3: - Remove extraneous trailing newlines from failure messages. - Replace `pr_warn` with `kunit_warn`. - Drop arch changes. - Remove KUnit boilerplate from CONFIG_PRINTF_KUNIT_TEST help text. - Restore `total_tests` counting. - Remove tc_fail macro in last patch. - Link to v2: https://lore.kernel.org/r/20250207-printf-kunit-convert-v2-0-057b23860823@g… Changes in v2: - Incorporate code review from prior work[0] by Arpitha Raghunandan. - Link to v1: https://lore.kernel.org/r/20250204-printf-kunit-convert-v1-0-ecf1b846a4de@g… Link: https://lore.kernel.org/lkml/20200817043028.76502-1-98.arpi@gmail.com/t/#u [0] --- Tamir Duberstein (2): printf: convert self-test to KUnit printf: break kunit into test cases Documentation/core-api/printk-formats.rst | 2 +- MAINTAINERS | 2 +- lib/Kconfig.debug | 12 +- lib/Makefile | 2 +- lib/{test_printf.c => printf_kunit.c} | 429 +++++++++++++----------------- tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/printf.sh | 4 - 7 files changed, 192 insertions(+), 260 deletions(-) --- base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3 change-id: 20250131-printf-kunit-convert-fd4012aa2ec6 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

4 months, 1 week

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[PATCH 1/2] misc: pci_endpoint_test: Give disabled BARs a distinct error code

by Niklas Cassel

The current code returns -ENOMEM if test->bar[barno] is NULL. There can be two reasons why test->bar[barno] is NULL: 1) The pci_ioremap_bar() call in pci_endpoint_test_probe() failed. 2) The BAR was skipped, because it is disabled by the endpoint. Many PCI endpoint controller drivers will disable all BARs in their init function. A disabled BAR will have a size of 0. A PCI endpoint function driver will be able to enable any BAR that is not marked as BAR_RESERVED (which means that the BAR should not be touched by the EPF driver). Thus, perform check if the size is 0, before checking if test->bar[barno] is NULL, such that we can return different errors. This will allow the selftests to return SKIP instead of FAIL for disabled BARs. Signed-off-by: Niklas Cassel <cassel(a)kernel.org> --- Hello PCI maintainers. This patch might give a trivial conflict with: https://lore.kernel.org/linux-pci/20250123095906.3578241-2-cassel@kernel.or… because the context lines (lines that haven't been changed) might be different. If there is a conflict, simply look at this patch by itself, and resolution should be trivial. drivers/misc/pci_endpoint_test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index d5ac71a49386..b95980b29eb9 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -292,11 +292,13 @@ static int pci_endpoint_test_bar(struct pci_endpoint_test *test, void *read_buf __free(kfree) = NULL; struct pci_dev *pdev = test->pdev; + bar_size = pci_resource_len(pdev, barno); + if (!bar_size) + return -ENODATA; + if (!test->bar[barno]) return -ENOMEM; - bar_size = pci_resource_len(pdev, barno); - if (barno == test->test_reg_bar) bar_size = 0x4; -- 2.48.1

4 months, 1 week

2
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[PATCH net-next v2 5/5] selftests: test_vxlan_fdb_changelink: Add a test for MC remote change

by Petr Machata

Changes to MC remote need to be reflected in actual group memberships. Add a test to verify that it is the case. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> --- Notes: CC: Simon Horman <horms(a)kernel.org> CC: Shuah Khan <shuah(a)kernel.org> CC: linux-kselftest(a)vger.kernel.org .../net/test_vxlan_fdb_changelink.sh | 76 +++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh b/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh index 6f2bca4b346c..062f957950af 100755 --- a/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh +++ b/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh @@ -3,6 +3,7 @@ ALL_TESTS=" test_set_remote + test_change_mc_remote " source lib.sh @@ -31,6 +32,81 @@ test_set_remote() log_test 'FDB default-remote handling across "ip link set"' } +fmt_remote() +{ + local addr=$1; shift + + if [[ $addr == 224.* ]]; then + echo "group $addr" + else + echo "remote $addr" + fi +} + +change_remote() +{ + local remote=$1; shift + + ip link set dev vx type vxlan $(fmt_remote $remote) dev v1 +} + +check_membership() +{ + local check_vec=("$@") + + local memberships + memberships=$( + netstat -n --groups | + sed -n '/^v1\b/p' | + grep -o '[^ ]*$' + ) + check_err $? "Couldn't obtain group memberships" + + local item + for item in "${check_vec[@]}"; do + eval "local $item" + echo "$memberships" | grep -q "\b$group\b" + check_err_fail $fail $? "$group is_ex reported in IGMP query response" + done +} + +test_change_mc_remote() +{ + check_command netstat || return + + ip_link_add v1 up type veth peer name v2 + ip_link_set_up v2 + + RET=0 + + ip_link_add vx up type vxlan dstport 4789 \ + local 192.0.2.1 $(fmt_remote 224.1.1.1) dev v1 vni 1000 + + check_membership "group=224.1.1.1 fail=0" \ + "group=224.1.1.2 fail=1" \ + "group=224.1.1.3 fail=1" + + log_test "MC group report after VXLAN creation" + + RET=0 + + change_remote 224.1.1.2 + check_membership "group=224.1.1.1 fail=1" \ + "group=224.1.1.2 fail=0" \ + "group=224.1.1.3 fail=1" + + log_test "MC group report after changing VXLAN remote MC->MC" + + RET=0 + + change_remote 192.0.2.2 + check_membership "group=224.1.1.1 fail=1" \ + "group=224.1.1.2 fail=1" \ + "group=224.1.1.3 fail=1" + + log_test "MC group report after changing VXLAN remote MC->UC" +} + trap defer_scopes_cleanup EXIT tests_run -- 2.47.0

4 months, 1 week

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[PATCH net-next v2 4/5] selftests: test_vxlan_fdb_changelink: Convert to lib.sh

by Petr Machata

Instead of inlining equivalents, use lib.sh-provided primitives. Use defer to manage vx lifetime. This will make it easier to extend the test in the next patch. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> --- Notes: CC: Simon Horman <horms(a)kernel.org> CC: Shuah Khan <shuah(a)kernel.org> CC: linux-kselftest(a)vger.kernel.org .../net/test_vxlan_fdb_changelink.sh | 39 ++++++++++++------- 1 file changed, 24 insertions(+), 15 deletions(-) diff --git a/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh b/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh index 2d442cdab11e..6f2bca4b346c 100755 --- a/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh +++ b/tools/testing/selftests/net/test_vxlan_fdb_changelink.sh @@ -1,29 +1,38 @@ #!/bin/bash # SPDX-License-Identifier: GPL-2.0 -# Check FDB default-remote handling across "ip link set". +ALL_TESTS=" + test_set_remote +" +source lib.sh check_remotes() { local what=$1; shift local N=$(bridge fdb sh dev vx | grep 00:00:00:00:00:00 | wc -l) - echo -ne "expected two remotes after $what\t" - if [[ $N != 2 ]]; then - echo "[FAIL]" - EXIT_STATUS=1 - else - echo "[ OK ]" - fi + ((N == 2)) + check_err $? "expected 2 remotes after $what, got $N" } -ip link add name vx up type vxlan id 2000 dstport 4789 -bridge fdb ap dev vx 00:00:00:00:00:00 dst 192.0.2.20 self permanent -bridge fdb ap dev vx 00:00:00:00:00:00 dst 192.0.2.30 self permanent -check_remotes "fdb append" +# Check FDB default-remote handling across "ip link set". +test_set_remote() +{ + RET=0 -ip link set dev vx type vxlan remote 192.0.2.30 -check_remotes "link set" + ip_link_add vx up type vxlan id 2000 dstport 4789 + bridge fdb ap dev vx 00:00:00:00:00:00 dst 192.0.2.20 self permanent + bridge fdb ap dev vx 00:00:00:00:00:00 dst 192.0.2.30 self permanent + check_remotes "fdb append" + + ip link set dev vx type vxlan remote 192.0.2.30 + check_remotes "link set" + + log_test 'FDB default-remote handling across "ip link set"' +} + +trap defer_scopes_cleanup EXIT + +tests_run -ip link del dev vx exit $EXIT_STATUS -- 2.47.0

4 months, 1 week

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[PATCH net-next v2 3/5] selftests: forwarding: lib: Move require_command to net, generalize

by Petr Machata

This helper could be useful to more than just forwarding tests. Move it upstairs and port over to log_test_skip(). Split the function into two parts: the bit that actually checks and reports skip, which is in a new function check_command(). And a bit that exits the test script if the check fails. This allows users consistent checking behavior while giving an option to bail out from a single test without bailing out of the whole script. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> --- Notes: CC: Simon Horman <horms(a)kernel.org> CC: Shuah Khan <shuah(a)kernel.org> CC: linux-kselftest(a)vger.kernel.org tools/testing/selftests/net/forwarding/lib.sh | 10 ---------- tools/testing/selftests/net/lib.sh | 19 +++++++++++++++++++ 2 files changed, 19 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 8de80acf249e..508f3c700d71 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -291,16 +291,6 @@ if [[ "$CHECK_TC" = "yes" ]]; then check_tc_version fi -require_command() -{ - local cmd=$1; shift - - if [[ ! -x "$(command -v "$cmd")" ]]; then - echo "SKIP: $cmd not installed" - exit $ksft_skip - fi -} - # IPv6 support was added in v3.0 check_mtools_version() { diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 0bd9a038a1f0..975be4fdbcdb 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -450,6 +450,25 @@ kill_process() { kill $pid && wait $pid; } 2>/dev/null } +check_command() +{ + local cmd=$1; shift + + if [[ ! -x "$(command -v "$cmd")" ]]; then + log_test_skip "$cmd not installed" + return $EXIT_STATUS + fi +} + +require_command() +{ + local cmd=$1; shift + + if ! check_command "$cmd"; then + exit $EXIT_STATUS + fi +} + ip_link_add() { local name=$1; shift -- 2.47.0

4 months, 1 week

1
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[PATCH v7 0/3] scanf: convert self-test to KUnit

by Tamir Duberstein

This is one of just 3 remaining "Test Module" kselftests (the others being bitmap and printf), the rest having been converted to KUnit. In addition to the enclosed patch, please consider this an RFC on the removal of the "Test Module" kselftest machinery. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 scanf Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v7: - Remove redundant debug logs. (Petr Mladek) - Drop Petr's Acked-by. - Use original test assertions as KUNIT_*_EQ_MSG produces hard-to-parse messages. The new failure output is: vsscanf("0 1e 3e43 31f0 0 0 5797 9c70", "%1hx %2hx %4hx %4hx %1hx %1hx %4hx %4hx", ...) expected 837828163 got 1044578334 not ok 1 " " # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:92 vsscanf("dc2:1c:0:3531:2621:5172:1:7", "%3hx:%2hx:%1hx:%4hx:%4hx:%4hx:%1hx:%1hx", ...) expected 892403712 got 28 not ok 2 ":" # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:92 vsscanf("e083,8f6e,b,70ca,1,1,aab1,10e4", "%4hx,%4hx,%1hx,%4hx,%1hx,%1hx,%4hx,%4hx", ...) expected 1892286475 got 757614 not ok 3 "," # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:92 vsscanf("2e72-8435-1-2fc-7cbd-c2f1-7158-2b41", "%4hx-%4hx-%1hx-%3hx-%4hx-%4hx-%4hx-%4hx", ...) expected 50069505 got 99381 not ok 4 "-" # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:92 vsscanf("403/0/17/1/11e7/1/1fe8/34ba", "%3hx/%1hx/%2hx/%1hx/%4hx/%1hx/%4hx/%4hx", ...) expected 65559 got 1507328 not ok 5 "/" # numbers_list_field_width_val_width: pass:0 fail:5 skip:0 total:5 not ok 4 numbers_list_field_width_val_width # numbers_slice: ASSERTION FAILED at lib/scanf_kunit.c:92 vsscanf("3c87eac0f4afa1f9231da52", "%1hx%4hx%4hx%4hx%1hx%4hx%4hx%1hx", ...) expected 1257942031 got 2886715518 - Link to v6: https://lore.kernel.org/r/20250210-scanf-kunit-convert-v6-0-4d583d07f92d@gm… Changes in v6: - s/at boot/at runtime/ for consistency with the printf series. - Go back to kmalloc. (Geert Uytterhoeven) - Link to v5: https://lore.kernel.org/r/20250210-scanf-kunit-convert-v5-0-8e64f3a7de99@gm… Changes in v5: - Remove extraneous trailing newlines from failure messages. - Replace `pr_debug` with `kunit_printk`. - Use static char arrays instead of kmalloc. - Drop KUnit boilerplate from CONFIG_SCANF_KUNIT_TEST help text. - Drop arch changes. - Link to v4: https://lore.kernel.org/r/20250207-scanf-kunit-convert-v4-0-a23e2afaede8@gm… Changes in v4: - Bake `test` into various macros, greatly reducing diff noise. - Revert control flow changes. - Link to v3: https://lore.kernel.org/r/20250204-scanf-kunit-convert-v3-0-386d7c3ee714@gm… Changes in v3: - Reduce diff noise in lib/Makefile. (Petr Mladek) - Split `scanf_test` into a few test cases. New output: : =================== scanf (10 subtests) ==================== : [PASSED] numbers_simple : ====================== numbers_list ======================= : [PASSED] delim=" " : [PASSED] delim=":" : [PASSED] delim="," : [PASSED] delim="-" : [PASSED] delim="/" : ================== [PASSED] numbers_list =================== : ============ numbers_list_field_width_typemax ============= : [PASSED] delim=" " : [PASSED] delim=":" : [PASSED] delim="," : [PASSED] delim="-" : [PASSED] delim="/" : ======== [PASSED] numbers_list_field_width_typemax ========= : =========== numbers_list_field_width_val_width ============ : [PASSED] delim=" " : [PASSED] delim=":" : [PASSED] delim="," : [PASSED] delim="-" : [PASSED] delim="/" : ======= [PASSED] numbers_list_field_width_val_width ======== : [PASSED] numbers_slice : [PASSED] numbers_prefix_overflow : [PASSED] test_simple_strtoull : [PASSED] test_simple_strtoll : [PASSED] test_simple_strtoul : [PASSED] test_simple_strtol : ====================== [PASSED] scanf ====================== : ============================================================ : Testing complete. Ran 22 tests: passed: 22 : Elapsed time: 5.517s total, 0.001s configuring, 5.440s building, 0.067s running - Link to v2: https://lore.kernel.org/r/20250203-scanf-kunit-convert-v2-1-277a618d804e@gm… Changes in v2: - Rename lib/{test_scanf.c => scanf_kunit.c}. (Andy Shevchenko) - Link to v1: https://lore.kernel.org/r/20250131-scanf-kunit-convert-v1-1-0976524f0eba@gm… --- Tamir Duberstein (3): scanf: remove redundant debug logs scanf: convert self-test to KUnit scanf: break kunit into test cases MAINTAINERS | 2 +- lib/Kconfig.debug | 12 +- lib/Makefile | 2 +- lib/{test_scanf.c => scanf_kunit.c} | 270 +++++++++++++++++------------------ tools/testing/selftests/lib/Makefile | 2 +- tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/scanf.sh | 4 - 7 files changed, 143 insertions(+), 150 deletions(-) --- base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3 change-id: 20250131-scanf-kunit-convert-f70dc33bb34c Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

4 months, 1 week

3
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[PATCH][next] KVM: selftests: Fix spelling mistake "Unabled" -> "Unable"

by Colin Ian King

There is a spelling mistake in a TEST_FAIL message. Fix it. Signed-off-by: Colin Ian King <colin.i.king(a)gmail.com> --- tools/testing/selftests/kvm/lib/kvm_util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index b1c3c7260902..279ad8946040 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -2283,7 +2283,7 @@ void kvm_get_stat(struct kvm_binary_stats *stats, const char *name, return; } - TEST_FAIL("Unabled to find stat '%s'", name); + TEST_FAIL("Unable to find stat '%s'", name); } __weak void kvm_arch_vm_post_create(struct kvm_vm *vm) -- 2.47.2

4 months, 1 week

2
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[PATCH net-next v19 00/26] Introducing OpenVPN Data Channel Offload

by Antonio Quartulli

All minor and major reported problems have been finally addressed. Big thanks to Sabrina, who took the time to guide me through converting the peer socket to an RCU pointer. This patchset comes with an extra patch for .mailmap to remove my @openvpn.net address from the file, otherwise git won't allow me to send patches from this address. Notable changes since v18: * ovpnstruct.h renamed to ovpnpriv.h to reflect new struct name * removed peers release upon NETDEV_DOWN * moved netdev_put() to after call_rcu() in ovpn_peer_release() * removed DEBUG_NET_WARN_ON_ONCE in case of mismatching peer in peer_del_p2p() * turned peer->sock into RCU pointer to be able to guarantee its validity in every context (thanks Sabrina for this!) ** the point above forced various socket handling functions to change into using a properly dereferenced RCU pointer instead of accessing peer->sock directly * ensured peer->sock is NULLified upon release so that other contexts have a way to check if the member carries a valid pointer or not * fixed ovpn_opcode_from_skb()'s comment about accessing 4 bytes (not 1) * improved ovpn_udp_encap_recv()'s comment wrt various packet types * ensured that 'iv' in ovpn_aead_crypt/decrypt() is malloc'd and carried in the skb's cb for async crypto usage * added missing ovpn_crypto_key_slot_put() in ovpn_encrypt_one() error path * TCP TX work item moved from ovpn_peer to ovpn_socket to ensure it stays alive along with the socket (peer may disappear earlier during release) * pulled 4 bytes (instead of 1) before calling ovpn_opcode_from_skb() in ovpn_tcp_rcv() * added missing kfree_skb() in ovpn_tcp_socket_detach() * moved call to ovpn_mp_alloc() to ndo_init() to ensure it could always be rolled back in case of register_netdevice() failure * splitted by_vpn_addr hashtables into by_vpn_addr4 and by_vpn_addr6 so that peers assigned a v4 or a v6 can be hashed separately. This avoids hash_entry offset mix ups during entries iterations * changed ovpn_nl_attr_sockaddr_remote() into returning just bool * added a few more consistency checks in peer_new/peer_set * added completion member to peer to signal when socket detachment has finished and thus allow peer_del call to happily terminate (thanks Sabrina again!) * extended selftest script with "peer removal during traffic exchange" Please note that some patches were already reviewed/tested by a few people. These patches have retained the tags as they have hardly been touched. The latest code can also be found at: https://github.com/OpenVPN/linux-kernel-ovpn NOTE: TCP tests are still showing the following warning while running iperf. I have analysed the report several times, but it definitely looks like a false positive to me, so nothing to worry about. Basically the lockdep engine gets confused thinking that we are acquiring the lock twice on the same sock, but actually: 1) the kernel is first locking the 'iperf' (user) TCP socket; 2) ovpn is later locking the underlying TCP trasport socket. So there is NO risk of deadlock (and indeed nothing hangs), but I couldn't find a way to make the warning go away. Here it is: [ 1056.319348] ============================================ [ 1056.319740] WARNING: possible recursive locking detected [ 1056.319740] 6.14.0-rc1-00217-g30aa34e21028-dirty #111 Tainted: G O [ 1056.319740] -------------------------------------------- [ 1056.319740] iperf3/1438 is trying to acquire lock: [ 1056.319740] ffff88811ea10218 (slock-AF_INET){+.-.}-{3:3}, at: ovpn_tcp_send_skb+0xef/0x490 [ovpn] [ 1056.319740] but task is already holding lock: [ 1056.319740] ffff8881112b1c98 (slock-AF_INET){+.-.}-{3:3}, at: tcp_delack_timer+0xaa/0x2e0 [ 1056.319740] other info that might help us debug this: [ 1056.319740] Possible unsafe locking scenario: [ 1056.319740] CPU0 [ 1056.319740] ---- [ 1056.319740] lock(slock-AF_INET); [ 1056.319740] lock(slock-AF_INET); [ 1056.319740] *** DEADLOCK *** [ 1056.319740] May be due to missing lock nesting notation [ 1056.319740] 6 locks held by iperf3/1438: [ 1056.319740] #0: ffffc90000400c28 ((&icsk->icsk_delack_timer)){+.-.}-{0:0}, at: call_timer_fn+0x102/0x230 [ 1056.319740] #1: ffff8881112b1c98 (slock-AF_INET){+.-.}-{3:3}, at: tcp_delack_timer+0xaa/0x2e0 [ 1056.319740] #2: ffffffff85ef2b20 (rcu_read_lock){....}-{1:3}, at: __ip_queue_xmit+0x68/0x1190 [ 1056.319740] #3: ffffffff85ef2b20 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x2d4/0x1bb0 [ 1056.319740] #4: ffffffff85ef2ac0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1fc/0xee0 [ 1056.319740] #5: ffffffff85ef2b20 (rcu_read_lock){....}-{1:3}, at: ovpn_encrypt_post+0x168/0x5d0 [ovpn] [ 1056.319740] stack backtrace: [ 1056.319740] CPU: 4 UID: 0 PID: 1438 Comm: iperf3 Tainted: G O 6.14.0-rc1-00217-g30aa34e21028-dirty #111 [ 1056.319740] Tainted: [O]=OOT_MODULE [ 1056.319740] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-20240910_120124-localhost 04/01/2014 [ 1056.319740] Call Trace: [ 1056.319740] <IRQ> [ 1056.319740] dump_stack_lvl+0x75/0xb0 [ 1056.319740] dump_stack+0x14/0x16 [ 1056.319740] print_deadlock_bug.cold+0xbd/0xc7 [ 1056.319740] validate_chain+0x6db/0xe00 [ 1056.319740] ? kfree_sensitive+0x63/0x70 [ 1056.319740] ? check_prev_add+0xa60/0xa60 [ 1056.319740] ? mark_lock+0x34/0x2d0 [ 1056.319740] ? check_wait_context.isra.0+0x245/0x6a0 [ 1056.319740] __lock_acquire+0x6ed/0x1000 [ 1056.319740] lock_acquire+0x182/0x3c0 [ 1056.319740] ? ovpn_tcp_send_skb+0xef/0x490 [ovpn] [ 1056.319740] ? __lock_acquire+0x1000/0x1000 [ 1056.319740] ? ovpn_encrypt_post+0x168/0x5d0 [ovpn] [ 1056.319740] ? __lock_acquire+0x1000/0x1000 [ 1056.319740] ? __kasan_slab_free+0x47/0x50 [ 1056.319740] _raw_spin_lock+0x36/0x50 [ 1056.319740] ? ovpn_tcp_send_skb+0xef/0x490 [ovpn] [ 1056.319740] ovpn_tcp_send_skb+0xef/0x490 [ovpn] [ 1056.319740] ovpn_encrypt_post+0x388/0x5d0 [ovpn] [ 1056.319740] ovpn_send+0x2a9/0x720 [ovpn] [ 1056.319740] ? ovpn_encrypt_post+0x5d0/0x5d0 [ovpn] [ 1056.319740] ovpn_net_xmit+0x5e1/0xa40 [ovpn] [ 1056.319740] ? ovpn_send+0x720/0x720 [ovpn] [ 1056.319740] dev_hard_start_xmit+0x1c4/0x350 [ 1056.319740] __dev_queue_xmit+0x477/0xee0 [ 1056.319740] ? netdev_core_pick_tx+0x2b0/0x2b0 [ 1056.319740] ? selinux_ip_postroute_compat+0x460/0x460 [ 1056.319740] neigh_direct_output+0x17/0x20 [ 1056.319740] ip_finish_output2+0x6fd/0x1bb0 [ 1056.319740] ? ip_fragment.constprop.0+0x220/0x220 [ 1056.319740] ? ip_frag_next+0xcf0/0xcf0 [ 1056.319740] __ip_finish_output+0x2f4/0x530 [ 1056.319740] ip_output+0x166/0x560 [ 1056.319740] ? __ip_local_out+0x44d/0x800 [ 1056.319740] ? ip_finish_output+0x20/0x20 [ 1056.319740] ? __ip_finish_output+0x530/0x530 [ 1056.319740] ? __kasan_check_write+0x18/0x20 [ 1056.319740] __ip_queue_xmit+0x6ec/0x1190 [ 1056.319740] ip_queue_xmit+0x4e/0x70 [ 1056.319740] __tcp_transmit_skb+0x17ce/0x3480 [ 1056.319740] ? __tcp_select_window+0x1700/0x1700 [ 1056.319740] ? __build_skb_around+0x23d/0x350 [ 1056.319740] __tcp_send_ack+0x393/0x700 [ 1056.319740] tcp_send_ack+0x43/0x50 [ 1056.319740] tcp_delack_timer_handler+0x2b2/0x440 [ 1056.319740] ? tcp_clamp_probe0_to_user_timeout+0x110/0x110 [ 1056.319740] tcp_delack_timer+0x1c9/0x2e0 [ 1056.319740] ? call_timer_fn+0x102/0x230 [ 1056.319740] ? tcp_delack_timer_handler+0x440/0x440 [ 1056.319740] call_timer_fn+0x151/0x230 [ 1056.319740] ? call_timer_fn+0x102/0x230 [ 1056.319740] ? trace_timer_expire_entry+0x1e0/0x1e0 [ 1056.319740] __run_timers+0x62f/0x950 [ 1056.319740] ? tcp_delack_timer_handler+0x440/0x440 [ 1056.319740] ? call_timer_fn+0x230/0x230 [ 1056.319740] ? __kasan_check_write+0x18/0x20 [ 1056.319740] ? trace_irq_disable+0x160/0x1e0 [ 1056.319740] run_timer_softirq+0x156/0x260 [ 1056.319740] ? __run_timers+0x950/0x950 [ 1056.319740] handle_softirqs+0x208/0x5d0 [ 1056.319740] ? trace_softirq_exit+0x1d0/0x1d0 [ 1056.319740] ? trace_preempt_on+0x21/0x30 [ 1056.319740] __irq_exit_rcu+0xc5/0x100 [ 1056.319740] irq_exit_rcu+0x12/0x20 [ 1056.319740] sysvec_apic_timer_interrupt+0x84/0xb0 [ 1056.319740] </IRQ> [ 1056.319740] <TASK> [ 1056.319740] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 1056.319740] RIP: 0010:acpi_pm_read+0x14/0x20 [ 1056.319740] Code: dd 7a 04 31 f6 48 89 e5 ff d0 5d c3 c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 0f 1f 44 00 00 55 8b 15 10 cc 2c 03 48 89 e5 ed <25> ff ff ff 00 5d c3 0f 1f 44 00 00 f3 0f 1e fa 0f 1f 44 00 00 8b [ 1056.319740] RSP: 0018:ffffc90002277bf8 EFLAGS: 00000246 [ 1056.319740] RAX: 000000000097dc75 RBX: dffffc0000000000 RCX: ffffffff817c4b93 [ 1056.319740] RDX: 0000000000000608 RSI: 0000000000000000 RDI: ffffffff868a5960 [ 1056.319740] RBP: ffffc90002277bf8 R08: 0000000000000001 R09: 0000000000000000 [ 1056.319740] R10: 0000000000000001 R11: 0000000000000000 R12: fffff5200044ef8e [ 1056.319740] R13: ffffc90002277c70 R14: 0000000000034608 R15: ffffffff868a5960 [ 1056.319740] ? __x64_sys_gettimeofday+0xc3/0x1a0 [ 1056.319740] ktime_get_real_ts64+0xcd/0x2d0 [ 1056.319740] __x64_sys_gettimeofday+0xc3/0x1a0 [ 1056.319740] ? put_itimerspec64+0x190/0x190 [ 1056.319740] x64_sys_call+0x1741/0x17d0 [ 1056.319740] do_syscall_64+0xd9/0x1b0 [ 1056.319740] ? syscall_exit_to_user_mode+0xd4/0x1e0 [ 1056.319740] ? do_syscall_64+0xe6/0x1b0 [ 1056.319740] ? syscall_exit_to_user_mode+0xd4/0x1e0 [ 1056.319740] ? do_syscall_64+0xe6/0x1b0 [ 1056.319740] ? __might_fault+0xb9/0x120 [ 1056.319740] ? __might_fault+0xee/0x120 [ 1056.319740] ? syscall_exit_to_user_mode+0xd4/0x1e0 [ 1056.319740] ? do_syscall_64+0xe6/0x1b0 [ 1056.319740] ? syscall_exit_to_user_mode+0xd4/0x1e0 [ 1056.319740] ? do_syscall_64+0xe6/0x1b0 [ 1056.319740] ? do_syscall_64+0xe6/0x1b0 [ 1056.319740] ? do_syscall_64+0xe6/0x1b0 [ 1056.319740] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1056.319740] RIP: 0033:0x7fa5fb82dabb [ 1056.319740] Code: e8 26 89 c0 48 89 47 08 48 85 f6 75 1e 31 c0 c3 81 3d 59 b5 ff ff ff ff ff 7f 74 76 f3 90 e9 3c ff ff ff b8 60 00 00 00 0f 05 <c3> 81 3d 3e b5 ff ff ff ff ff 7f 48 8d 15 33 b5 ff ff 48 8d 05 2c [ 1056.319740] RSP: 002b:00007ffd9d3763b8 EFLAGS: 00000297 ORIG_RAX: 0000000000000060 [ 1056.319740] RAX: ffffffffffffffda RBX: 000055a374dfb260 RCX: 00007fa5fb82dabb [ 1056.319740] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd9d3763c0 [ 1056.319740] RBP: 00007ffd9d3763d0 R08: 0000000000000000 R09: 0000000000034608 [ 1056.319740] R10: 00007fa5fb829000 R11: 0000000000000297 R12: 00007ffd9d376450 [ 1056.319740] R13: 00007ffd9d3763c0 R14: 0000000000000001 R15: 0000000000000001 [ 1056.319740] </TASK> Thanks a lot! Best Regards, Antonio Quartulli OpenVPN Inc. --- Antonio Quartulli (26): net: introduce OpenVPN Data Channel Offload (ovpn) ovpn: add basic netlink support ovpn: add basic interface creation/destruction/management routines ovpn: keep carrier always on for MP interfaces ovpn: introduce the ovpn_peer object ovpn: introduce the ovpn_socket object ovpn: implement basic TX path (UDP) ovpn: implement basic RX path (UDP) ovpn: implement packet processing ovpn: store tunnel and transport statistics ipv6: export inet6_stream_ops via EXPORT_SYMBOL_GPL ovpn: implement TCP transport skb: implement skb_send_sock_locked_with_flags() ovpn: add support for MSG_NOSIGNAL in tcp_sendmsg ovpn: implement multi-peer support ovpn: implement peer lookup logic ovpn: implement keepalive mechanism ovpn: add support for updating local UDP endpoint ovpn: add support for peer floating ovpn: implement peer add/get/dump/delete via netlink ovpn: implement key add/get/del/swap via netlink ovpn: kill key and notify userspace in case of IV exhaustion ovpn: notify userspace when a peer is deleted ovpn: add basic ethtool support testing/selftests: add test tool and scripts for ovpn module mailmap: remove unwanted entry for Antonio Quartulli .mailmap | 1 - Documentation/netlink/specs/ovpn.yaml | 372 +++ Documentation/netlink/specs/rt_link.yaml | 16 + MAINTAINERS | 11 + drivers/net/Kconfig | 15 + drivers/net/Makefile | 1 + drivers/net/ovpn/Makefile | 22 + drivers/net/ovpn/bind.c | 55 + drivers/net/ovpn/bind.h | 101 + drivers/net/ovpn/crypto.c | 211 ++ drivers/net/ovpn/crypto.h | 145 ++ drivers/net/ovpn/crypto_aead.c | 408 ++++ drivers/net/ovpn/crypto_aead.h | 33 + drivers/net/ovpn/io.c | 462 ++++ drivers/net/ovpn/io.h | 34 + drivers/net/ovpn/main.c | 346 +++ drivers/net/ovpn/main.h | 14 + drivers/net/ovpn/netlink-gen.c | 213 ++ drivers/net/ovpn/netlink-gen.h | 41 + drivers/net/ovpn/netlink.c | 1248 ++++++++++ drivers/net/ovpn/netlink.h | 18 + drivers/net/ovpn/ovpnpriv.h | 57 + drivers/net/ovpn/peer.c | 1273 +++++++++++ drivers/net/ovpn/peer.h | 164 ++ drivers/net/ovpn/pktid.c | 129 ++ drivers/net/ovpn/pktid.h | 87 + drivers/net/ovpn/proto.h | 118 + drivers/net/ovpn/skb.h | 61 + drivers/net/ovpn/socket.c | 223 ++ drivers/net/ovpn/socket.h | 51 + drivers/net/ovpn/stats.c | 21 + drivers/net/ovpn/stats.h | 47 + drivers/net/ovpn/tcp.c | 557 +++++ drivers/net/ovpn/tcp.h | 34 + drivers/net/ovpn/udp.c | 421 ++++ drivers/net/ovpn/udp.h | 24 + include/linux/skbuff.h | 2 + include/uapi/linux/if_link.h | 15 + include/uapi/linux/ovpn.h | 111 + include/uapi/linux/udp.h | 1 + net/core/skbuff.c | 18 +- net/ipv6/af_inet6.c | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/net/ovpn/.gitignore | 2 + tools/testing/selftests/net/ovpn/Makefile | 17 + tools/testing/selftests/net/ovpn/config | 10 + tools/testing/selftests/net/ovpn/data64.key | 5 + tools/testing/selftests/net/ovpn/ovpn-cli.c | 2377 ++++++++++++++++++++ tools/testing/selftests/net/ovpn/tcp_peers.txt | 5 + .../testing/selftests/net/ovpn/test-chachapoly.sh | 9 + tools/testing/selftests/net/ovpn/test-float.sh | 9 + tools/testing/selftests/net/ovpn/test-tcp.sh | 9 + tools/testing/selftests/net/ovpn/test.sh | 192 ++ tools/testing/selftests/net/ovpn/udp_peers.txt | 5 + 54 files changed, 9817 insertions(+), 6 deletions(-) --- base-commit: 39f54262ba499d862420a97719d2f0eea0cbd394 change-id: 20241002-b4-ovpn-eeee35c694a2 Best regards, -- Antonio Quartulli <antonio(a)openvpn.net>

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