* [PATCH net-next 1/2] net: hsr: Fix PRP duplicate detection @ 2025-02-19 12:48 Jaakko Karrenpalo 2025-02-19 12:48 ` [PATCH net-next 2/2] net: hsr: Add KUnit test for PRP Jaakko Karrenpalo 0 siblings, 1 reply; 3+ messages in thread From: Jaakko Karrenpalo @ 2025-02-19 12:48 UTC (permalink / raw) To: David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni, Simon Horman Cc: linux-kernel, netdev, Jaakko Karrenpalo Add PRP specific function for handling duplicate packets. This is needed because of potential L2 802.1p prioritization done by network switches. Signed-off-by: Jaakko Karrenpalo <jaakko.karrenpalo@fi.abb.com> --- net/hsr/hsr_device.c | 2 + net/hsr/hsr_forward.c | 4 +- net/hsr/hsr_framereg.c | 93 ++++++++++++++++++++++++++++++++++++++++-- net/hsr/hsr_framereg.h | 8 +++- net/hsr/hsr_main.h | 2 + 5 files changed, 102 insertions(+), 7 deletions(-) diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index b6fb18469439..2c43776b7c4f 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -616,6 +616,7 @@ static struct hsr_proto_ops hsr_ops = { .drop_frame = hsr_drop_frame, .fill_frame_info = hsr_fill_frame_info, .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame, + .register_frame_out = hsr_register_frame_out, }; static struct hsr_proto_ops prp_ops = { @@ -626,6 +627,7 @@ static struct hsr_proto_ops prp_ops = { .fill_frame_info = prp_fill_frame_info, .handle_san_frame = prp_handle_san_frame, .update_san_info = prp_update_san_info, + .register_frame_out = prp_register_frame_out, }; void hsr_dev_setup(struct net_device *dev) diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c index a4bacf198555..aebeced10ad8 100644 --- a/net/hsr/hsr_forward.c +++ b/net/hsr/hsr_forward.c @@ -536,8 +536,8 @@ static void hsr_forward_do(struct hsr_frame_info *frame) * Also for SAN, this shouldn't be done. */ if (!frame->is_from_san && - hsr_register_frame_out(port, frame->node_src, - frame->sequence_nr)) + hsr->proto_ops->register_frame_out && + hsr->proto_ops->register_frame_out(port, frame)) continue; if (frame->is_supervision && port->type == HSR_PT_MASTER && diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 73bc6f659812..98898f05df6a 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -35,6 +35,7 @@ static bool seq_nr_after(u16 a, u16 b) #define seq_nr_before(a, b) seq_nr_after((b), (a)) #define seq_nr_before_or_eq(a, b) (!seq_nr_after((a), (b))) +#define PRP_DROP_WINDOW_LEN 32768 bool hsr_addr_is_redbox(struct hsr_priv *hsr, unsigned char *addr) { @@ -176,8 +177,11 @@ static struct hsr_node *hsr_add_node(struct hsr_priv *hsr, new_node->time_in[i] = now; new_node->time_out[i] = now; } - for (i = 0; i < HSR_PT_PORTS; i++) + for (i = 0; i < HSR_PT_PORTS; i++) { new_node->seq_out[i] = seq_out; + new_node->seq_expected[i] = seq_out + 1; + new_node->seq_start[i] = seq_out + 1; + } if (san && hsr->proto_ops->handle_san_frame) hsr->proto_ops->handle_san_frame(san, rx_port, new_node); @@ -482,9 +486,11 @@ void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port, * 0 otherwise, or * negative error code on error */ -int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node, - u16 sequence_nr) +int hsr_register_frame_out(struct hsr_port *port, struct hsr_frame_info *frame) { + struct hsr_node *node = frame->node_src; + u16 sequence_nr = frame->sequence_nr; + spin_lock_bh(&node->seq_out_lock); if (seq_nr_before_or_eq(sequence_nr, node->seq_out[port->type]) && time_is_after_jiffies(node->time_out[port->type] + @@ -499,6 +505,87 @@ int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node, return 0; } +/* Adaptation of the PRP duplicate discard algorithm described in wireshark + * wiki (https://wiki.wireshark.org/PRP) + * + * A drop window is maintained for both LANs with start sequence set to the + * first sequence accepted on the LAN that has not been seen on the other LAN, + * and expected sequence set to the latest received sequence number plus one. + * + * When a frame is received on either LAN it is compared against the received + * frames on the other LAN. If it is outside the drop window of the other LAN + * the frame is accepted and the drop window is updated. + * The drop window for the other LAN is reset. + * + * 'port' is the outgoing interface + * 'frame' is the frame to be sent + * + * Return: + * 1 if frame can be shown to have been sent recently on this interface, + * 0 otherwise + */ +int prp_register_frame_out(struct hsr_port *port, struct hsr_frame_info *frame) +{ + enum hsr_port_type other_port; + enum hsr_port_type rcv_port; + struct hsr_node *node; + u16 sequence_nr; + + /* out-going frames are always in order + *and can be checked the same way as for HSR + */ + if (frame->port_rcv->type == HSR_PT_MASTER) + return hsr_register_frame_out(port, frame); + + /* for PRP we should only forward frames from the slave ports + * to the master port + */ + if (port->type != HSR_PT_MASTER) + return 1; + + node = frame->node_src; + sequence_nr = frame->sequence_nr; + rcv_port = frame->port_rcv->type; + other_port = + rcv_port == HSR_PT_SLAVE_A ? HSR_PT_SLAVE_B : HSR_PT_SLAVE_A; + + spin_lock_bh(&node->seq_out_lock); + if (time_is_before_jiffies(node->time_out[port->type] + + msecs_to_jiffies(HSR_ENTRY_FORGET_TIME)) || + (node->seq_start[rcv_port] == node->seq_expected[rcv_port] && + node->seq_start[other_port] == node->seq_expected[other_port])) { + /* the node hasn't been sending for a while + * or both drop windows are empty, forward the frame + */ + node->seq_start[rcv_port] = sequence_nr; + } else if (seq_nr_before(sequence_nr, node->seq_expected[other_port]) && + seq_nr_before_or_eq(node->seq_start[other_port], sequence_nr)) { + /* drop the frame, update the drop window for the other port + * and reset our drop window + */ + node->seq_start[other_port] = sequence_nr + 1; + node->seq_expected[rcv_port] = sequence_nr + 1; + node->seq_start[rcv_port] = node->seq_expected[rcv_port]; + spin_unlock_bh(&node->seq_out_lock); + return 1; + } + + /* update the drop window for the port where this frame was received + * and clear the drop window for the other port + */ + node->seq_start[other_port] = node->seq_expected[other_port]; + node->seq_expected[rcv_port] = sequence_nr + 1; + if ((u16)(node->seq_expected[rcv_port] - node->seq_start[rcv_port]) + > PRP_DROP_WINDOW_LEN) + node->seq_start[rcv_port] = + node->seq_expected[rcv_port] - PRP_DROP_WINDOW_LEN; + + node->time_out[port->type] = jiffies; + node->seq_out[port->type] = sequence_nr; + spin_unlock_bh(&node->seq_out_lock); + return 0; +} + static struct hsr_port *get_late_port(struct hsr_priv *hsr, struct hsr_node *node) { diff --git a/net/hsr/hsr_framereg.h b/net/hsr/hsr_framereg.h index 993fa950d814..b04948659d84 100644 --- a/net/hsr/hsr_framereg.h +++ b/net/hsr/hsr_framereg.h @@ -44,8 +44,7 @@ void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb, void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port, u16 sequence_nr); -int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node, - u16 sequence_nr); +int hsr_register_frame_out(struct hsr_port *port, struct hsr_frame_info *frame); void hsr_prune_nodes(struct timer_list *t); void hsr_prune_proxy_nodes(struct timer_list *t); @@ -73,6 +72,8 @@ void prp_update_san_info(struct hsr_node *node, bool is_sup); bool hsr_is_node_in_db(struct list_head *node_db, const unsigned char addr[ETH_ALEN]); +int prp_register_frame_out(struct hsr_port *port, struct hsr_frame_info *frame); + struct hsr_node { struct list_head mac_list; /* Protect R/W access to seq_out */ @@ -89,6 +90,9 @@ struct hsr_node { bool san_b; u16 seq_out[HSR_PT_PORTS]; bool removed; + /* PRP specific duplicate handling */ + u16 seq_expected[HSR_PT_PORTS]; + u16 seq_start[HSR_PT_PORTS]; struct rcu_head rcu_head; }; diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h index 7561845b8bf6..1bc47b17a296 100644 --- a/net/hsr/hsr_main.h +++ b/net/hsr/hsr_main.h @@ -175,6 +175,8 @@ struct hsr_proto_ops { struct hsr_frame_info *frame); bool (*invalid_dan_ingress_frame)(__be16 protocol); void (*update_san_info)(struct hsr_node *node, bool is_sup); + int (*register_frame_out)(struct hsr_port *port, + struct hsr_frame_info *frame); }; struct hsr_self_node { -- 2.43.0 ^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH net-next 2/2] net: hsr: Add KUnit test for PRP 2025-02-19 12:48 [PATCH net-next 1/2] net: hsr: Fix PRP duplicate detection Jaakko Karrenpalo @ 2025-02-19 12:48 ` Jaakko Karrenpalo 2025-02-20 16:49 ` kernel test robot 0 siblings, 1 reply; 3+ messages in thread From: Jaakko Karrenpalo @ 2025-02-19 12:48 UTC (permalink / raw) To: David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni, Simon Horman Cc: linux-kernel, netdev, Jaakko Karrenpalo Add unit tests for the PRP duplicate detection Signed-off-by: Jaakko Karrenpalo <jaakko.karrenpalo@fi.abb.com> --- net/hsr/Kconfig | 18 +++ net/hsr/Makefile | 2 + net/hsr/prp_dup_discard_test.c | 210 +++++++++++++++++++++++++++++++++ 3 files changed, 230 insertions(+) create mode 100644 net/hsr/prp_dup_discard_test.c diff --git a/net/hsr/Kconfig b/net/hsr/Kconfig index 1b048c17b6c8..fcacdf4f0ffc 100644 --- a/net/hsr/Kconfig +++ b/net/hsr/Kconfig @@ -38,3 +38,21 @@ config HSR relying on this code in a safety critical system! If unsure, say N. + +if HSR + +config PRP_DUP_DISCARD_KUNIT_TEST + tristate "PRP duplicate discard KUnit tests" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS + help + Covers the PRP duplicate discard algorithm. + Only useful for kernel devs running KUnit test harness and are not + for inclusion into a production build. + + For more information on KUnit and unit tests in general please refer + to the KUnit documentation in Documentation/dev-tools/kunit/. + + If unsure, say N. + +endif diff --git a/net/hsr/Makefile b/net/hsr/Makefile index 75df90d3b416..34e581db5c41 100644 --- a/net/hsr/Makefile +++ b/net/hsr/Makefile @@ -8,3 +8,5 @@ obj-$(CONFIG_HSR) += hsr.o hsr-y := hsr_main.o hsr_framereg.o hsr_device.o \ hsr_netlink.o hsr_slave.o hsr_forward.o hsr-$(CONFIG_DEBUG_FS) += hsr_debugfs.o + +obj-$(CONFIG_PRP_DUP_DISCARD_KUNIT_TEST) += prp_dup_discard_test.o diff --git a/net/hsr/prp_dup_discard_test.c b/net/hsr/prp_dup_discard_test.c new file mode 100644 index 000000000000..e212bdf24720 --- /dev/null +++ b/net/hsr/prp_dup_discard_test.c @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <kunit/test.h> + +#include "hsr_main.h" +#include "hsr_framereg.h" + +struct prp_test_data { + struct hsr_port port; + struct hsr_port port_rcv; + struct hsr_frame_info frame; + struct hsr_node node; +}; + +static struct prp_test_data *build_prp_test_data(struct kunit *test) +{ + struct prp_test_data *data = kunit_kzalloc(test, + sizeof(struct prp_test_data), GFP_USER); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, data); + + data->frame.node_src = &data->node; + data->frame.port_rcv = &data->port_rcv; + data->port_rcv.type = HSR_PT_SLAVE_A; + data->node.seq_start[HSR_PT_SLAVE_A] = 1; + data->node.seq_expected[HSR_PT_SLAVE_A] = 1; + data->node.seq_start[HSR_PT_SLAVE_B] = 1; + data->node.seq_expected[HSR_PT_SLAVE_B] = 1; + data->node.seq_out[HSR_PT_MASTER] = 0; + data->node.time_out[HSR_PT_MASTER] = jiffies; + data->port.type = HSR_PT_MASTER; + + return data; +} + +static void check_prp_counters(struct kunit *test, + struct prp_test_data *data, + u16 seq_start_a, u16 seq_expected_a, + u16 seq_start_b, u16 seq_expected_b) +{ + KUNIT_EXPECT_EQ(test, data->node.seq_start[HSR_PT_SLAVE_A], + seq_start_a); + KUNIT_EXPECT_EQ(test, data->node.seq_start[HSR_PT_SLAVE_B], + seq_start_b); + KUNIT_EXPECT_EQ(test, data->node.seq_expected[HSR_PT_SLAVE_A], + seq_expected_a); + KUNIT_EXPECT_EQ(test, data->node.seq_expected[HSR_PT_SLAVE_B], + seq_expected_b); +} + +static void prp_dup_discard_forward(struct kunit *test) +{ + /* Normal situation, both LANs in sync. Next frame is forwarded */ + struct prp_test_data *data = build_prp_test_data(test); + + data->frame.sequence_nr = 2; + KUNIT_EXPECT_EQ(test, 0, + prp_register_frame_out(&data->port, &data->frame)); + KUNIT_EXPECT_EQ(test, data->frame.sequence_nr, + data->node.seq_out[HSR_PT_MASTER]); + KUNIT_EXPECT_EQ(test, jiffies, data->node.time_out[HSR_PT_MASTER]); + check_prp_counters(test, data, data->frame.sequence_nr, + data->frame.sequence_nr + 1, 1, 1); +} + +static void prp_dup_discard_inside_dropwindow(struct kunit *test) +{ + /* Normal situation, other LAN ahead by one. Frame is dropped */ + struct prp_test_data *data = build_prp_test_data(test); + unsigned long time = jiffies - 10; + + data->frame.sequence_nr = 1; + data->node.seq_expected[HSR_PT_SLAVE_B] = 3; + data->node.seq_out[HSR_PT_MASTER] = 2; + data->node.time_out[HSR_PT_MASTER] = time; + + KUNIT_EXPECT_EQ(test, 1, + prp_register_frame_out(&data->port, &data->frame)); + KUNIT_EXPECT_EQ(test, 2, data->node.seq_out[HSR_PT_MASTER]); + KUNIT_EXPECT_EQ(test, time, data->node.time_out[HSR_PT_MASTER]); + check_prp_counters(test, data, 2, 2, 2, 3); +} + +static void prp_dup_discard_node_timeout(struct kunit *test) +{ + /* Timeout situation, node hasn't sent anything for a while */ + struct prp_test_data *data = build_prp_test_data(test); + + data->frame.sequence_nr = 7; + data->node.seq_start[HSR_PT_SLAVE_A] = 1234; + data->node.seq_expected[HSR_PT_SLAVE_A] = 1235; + data->node.seq_start[HSR_PT_SLAVE_B] = 1234; + data->node.seq_expected[HSR_PT_SLAVE_B] = 1234; + data->node.seq_out[HSR_PT_MASTER] = 1234; + data->node.time_out[HSR_PT_MASTER] = + jiffies - msecs_to_jiffies(HSR_ENTRY_FORGET_TIME) - 1; + + KUNIT_EXPECT_EQ(test, 0, + prp_register_frame_out(&data->port, &data->frame)); + KUNIT_EXPECT_EQ(test, data->frame.sequence_nr, + data->node.seq_out[HSR_PT_MASTER]); + KUNIT_EXPECT_EQ(test, jiffies, data->node.time_out[HSR_PT_MASTER]); + check_prp_counters(test, data, data->frame.sequence_nr, + data->frame.sequence_nr + 1, 1234, 1234); +} + +static void prp_dup_discard_out_of_sequence(struct kunit *test) +{ + /* One frame is received out of sequence on both LANs */ + struct prp_test_data *data = build_prp_test_data(test); + + data->node.seq_start[HSR_PT_SLAVE_A] = 10; + data->node.seq_expected[HSR_PT_SLAVE_A] = 10; + data->node.seq_start[HSR_PT_SLAVE_B] = 10; + data->node.seq_expected[HSR_PT_SLAVE_B] = 10; + data->node.seq_out[HSR_PT_MASTER] = 9; + + /* 1st old frame, should be accepted */ + data->frame.sequence_nr = 8; + KUNIT_EXPECT_EQ(test, 0, + prp_register_frame_out(&data->port, &data->frame)); + KUNIT_EXPECT_EQ(test, data->frame.sequence_nr, + data->node.seq_out[HSR_PT_MASTER]); + check_prp_counters(test, data, data->frame.sequence_nr, + data->frame.sequence_nr + 1, 10, 10); + + /* 2nd frame should be dropped */ + data->frame.sequence_nr = 8; + data->port_rcv.type = HSR_PT_SLAVE_B; + KUNIT_EXPECT_EQ(test, 1, + prp_register_frame_out(&data->port, &data->frame)); + check_prp_counters(test, data, data->frame.sequence_nr + 1, + data->frame.sequence_nr + 1, + data->frame.sequence_nr + 1, + data->frame.sequence_nr + 1); + + /* Next frame, this is forwarded */ + data->frame.sequence_nr = 10; + data->port_rcv.type = HSR_PT_SLAVE_A; + KUNIT_EXPECT_EQ(test, 0, + prp_register_frame_out(&data->port, &data->frame)); + KUNIT_EXPECT_EQ(test, data->frame.sequence_nr, + data->node.seq_out[HSR_PT_MASTER]); + check_prp_counters(test, data, data->frame.sequence_nr, + data->frame.sequence_nr + 1, 9, 9); + + /* and next one is dropped */ + data->frame.sequence_nr = 10; + data->port_rcv.type = HSR_PT_SLAVE_B; + KUNIT_EXPECT_EQ(test, 1, + prp_register_frame_out(&data->port, &data->frame)); + check_prp_counters(test, data, data->frame.sequence_nr + 1, + data->frame.sequence_nr + 1, + data->frame.sequence_nr + 1, + data->frame.sequence_nr + 1); +} + +static void prp_dup_discard_lan_b_late(struct kunit *test) +{ + /* LAN B is behind */ + struct prp_test_data *data = build_prp_test_data(test); + + data->node.seq_start[HSR_PT_SLAVE_A] = 9; + data->node.seq_expected[HSR_PT_SLAVE_A] = 9; + data->node.seq_start[HSR_PT_SLAVE_B] = 9; + data->node.seq_expected[HSR_PT_SLAVE_B] = 9; + data->node.seq_out[HSR_PT_MASTER] = 8; + + data->frame.sequence_nr = 9; + KUNIT_EXPECT_EQ(test, 0, + prp_register_frame_out(&data->port, &data->frame)); + KUNIT_EXPECT_EQ(test, data->frame.sequence_nr, + data->node.seq_out[HSR_PT_MASTER]); + check_prp_counters(test, data, 9, 10, 9, 9); + + data->frame.sequence_nr = 10; + KUNIT_EXPECT_EQ(test, 0, + prp_register_frame_out(&data->port, &data->frame)); + KUNIT_EXPECT_EQ(test, data->frame.sequence_nr, + data->node.seq_out[HSR_PT_MASTER]); + check_prp_counters(test, data, 9, 11, 9, 9); + + data->frame.sequence_nr = 9; + data->port_rcv.type = HSR_PT_SLAVE_B; + KUNIT_EXPECT_EQ(test, 1, + prp_register_frame_out(&data->port, &data->frame)); + check_prp_counters(test, data, 10, 11, 10, 10); + + data->frame.sequence_nr = 10; + data->port_rcv.type = HSR_PT_SLAVE_B; + KUNIT_EXPECT_EQ(test, 1, + prp_register_frame_out(&data->port, &data->frame)); + check_prp_counters(test, data, 11, 11, 11, 11); +} + +static struct kunit_case prp_dup_discard_test_cases[] = { + KUNIT_CASE(prp_dup_discard_forward), + KUNIT_CASE(prp_dup_discard_inside_dropwindow), + KUNIT_CASE(prp_dup_discard_node_timeout), + KUNIT_CASE(prp_dup_discard_out_of_sequence), + KUNIT_CASE(prp_dup_discard_lan_b_late), + {} +}; + +static struct kunit_suite prp_dup_discard_suite = { + .name = "prp_duplicate_discard", + .test_cases = prp_dup_discard_test_cases, +}; + +kunit_test_suite(prp_dup_discard_suite); + +MODULE_LICENSE("GPL"); -- 2.43.0 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH net-next 2/2] net: hsr: Add KUnit test for PRP 2025-02-19 12:48 ` [PATCH net-next 2/2] net: hsr: Add KUnit test for PRP Jaakko Karrenpalo @ 2025-02-20 16:49 ` kernel test robot 0 siblings, 0 replies; 3+ messages in thread From: kernel test robot @ 2025-02-20 16:49 UTC (permalink / raw) To: Jaakko Karrenpalo, David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni, Simon Horman Cc: oe-kbuild-all, netdev, linux-kernel, Jaakko Karrenpalo Hi Jaakko, kernel test robot noticed the following build errors: [auto build test ERROR on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/Jaakko-Karrenpalo/net-hsr-Add-KUnit-test-for-PRP/20250219-205153 base: net-next/main patch link: https://lore.kernel.org/r/20250219124831.544318-2-jaakko.karrenpalo%40fi.abb.com patch subject: [PATCH net-next 2/2] net: hsr: Add KUnit test for PRP config: riscv-randconfig-001-20250220 (https://download.01.org/0day-ci/archive/20250221/202502210240.ZO6FLmH9-lkp@intel.com/config) compiler: riscv64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250221/202502210240.ZO6FLmH9-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202502210240.ZO6FLmH9-lkp@intel.com/ All errors (new ones prefixed by >>, old ones prefixed by <<): WARNING: modpost: missing MODULE_DESCRIPTION() in net/hsr/prp_dup_discard_test.o >> ERROR: modpost: "prp_register_frame_out" [net/hsr/prp_dup_discard_test.ko] undefined! -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2025-02-20 16:50 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2025-02-19 12:48 [PATCH net-next 1/2] net: hsr: Fix PRP duplicate detection Jaakko Karrenpalo 2025-02-19 12:48 ` [PATCH net-next 2/2] net: hsr: Add KUnit test for PRP Jaakko Karrenpalo 2025-02-20 16:49 ` kernel test robot
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