Merge branch 'drop_monitor-for-offloaded-paths'

Ido Schimmel says:

====================
Add drop monitor for offloaded data paths

Users have several ways to debug the kernel and understand why a packet
was dropped. For example, using drop monitor and perf. Both utilities
trace kfree_skb(), which is the function called when a packet is freed
as part of a failure. The information provided by these tools is
invaluable when trying to understand the cause of a packet loss.

In recent years, large portions of the kernel data path were offloaded
to capable devices. Today, it is possible to perform L2 and L3
forwarding in hardware, as well as tunneling (IP-in-IP and VXLAN).
Different TC classifiers and actions are also offloaded to capable
devices, at both ingress and egress.

However, when the data path is offloaded it is not possible to achieve
the same level of introspection since packets are dropped by the
underlying device and never reach the kernel.

This patchset aims to solve this by allowing users to monitor packets
that the underlying device decided to drop along with relevant metadata
such as the drop reason and ingress port.

The above is achieved by exposing a fundamental capability of devices
capable of data path offloading - packet trapping. In much the same way
as drop monitor registers its probe function with the kfree_skb()
tracepoint, the device is instructed to pass to the CPU (trap) packets
that it decided to drop in various places in the pipeline.

The configuration of the device to pass such packets to the CPU is
performed using devlink, as it is not specific to a port, but rather to
a device. In the future, we plan to control the policing of such packets
using devlink, in order not to overwhelm the CPU.

While devlink is used as the control path, the dropped packets are
passed along with metadata to drop monitor, which reports them to
userspace as netlink events. This allows users to use the same interface
for the monitoring of both software and hardware drops.

Logically, the solution looks as follows:

                                    Netlink event: Packet w/ metadata
                                                   Or a summary of recent drops
                                  ^
                                  |
         Userspace                |
        +---------------------------------------------------+
         Kernel                   |
                                  |
                          +-------+--------+
                          |                |
                          |  drop_monitor  |
                          |                |
                          +-------^--------+
                                  |
                                  |
                                  |
                             +----+----+
                             |         |      Kernel's Rx path
                             | devlink |      (non-drop traps)
                             |         |
                             +----^----+      ^
                                  |           |
                                  +-----------+
                                  |
                          +-------+-------+
                          |               |
                          | Device driver |
                          |               |
                          +-------^-------+
         Kernel                   |
        +---------------------------------------------------+
         Hardware                 |
                                  | Trapped packet
                                  |
                               +--+---+
                               |      |
                               | ASIC |
                               |      |
                               +------+

In order to reduce the patch count, this patchset only includes
integration with netdevsim. A follow-up patchset will add devlink-trap
support in mlxsw.

Patches #1-#7 extend drop monitor to also monitor hardware originated
drops.

Patches #8-#10 add the devlink-trap infrastructure.

Patches #11-#12 add devlink-trap support in netdevsim.

Patches #13-#16 add tests for the generic infrastructure over netdevsim.

Example
=======

Instantiate netdevsim
---------------------

List supported traps
--------------------

netdevsim/netdevsim10:
  name source_mac_is_multicast type drop generic true action drop group l2_drops
  name vlan_tag_mismatch type drop generic true action drop group l2_drops
  name ingress_vlan_filter type drop generic true action drop group l2_drops
  name ingress_spanning_tree_filter type drop generic true action drop group l2_drops
  name port_list_is_empty type drop generic true action drop group l2_drops
  name port_loopback_filter type drop generic true action drop group l2_drops
  name fid_miss type exception generic false action trap group l2_drops
  name blackhole_route type drop generic true action drop group l3_drops
  name ttl_value_is_too_small type exception generic true action trap group l3_drops
  name tail_drop type drop generic true action drop group buffer_drops

Enable a trap
-------------

Query statistics
----------------

netdevsim/netdevsim10:
  name blackhole_route type drop generic true action trap group l3_drops
    stats:
        rx:
          bytes 7384 packets 52

Monitor dropped packets
-----------------------

dropwatch> set alertmode packet
Setting alert mode
Alert mode successfully set
dropwatch> set sw true
setting software drops monitoring to 1
dropwatch> set hw true
setting hardware drops monitoring to 1
dropwatch> start
Enabling monitoring...
Kernel monitoring activated.
Issue Ctrl-C to stop monitoring
drop at: ttl_value_is_too_small (l3_drops)
origin: hardware
input port ifindex: 55
input port name: eth0
timestamp: Mon Aug 12 10:52:20 2019 445911505 nsec
protocol: 0x800
length: 142
original length: 142

drop at: ip6_mc_input+0x8b8/0xef8 (0xffffffff9e2bb0e8)
origin: software
input port ifindex: 4
timestamp: Mon Aug 12 10:53:37 2019 024444587 nsec
protocol: 0x86dd
length: 110
original length: 110

Future plans
============

* Provide more drop reasons as well as more metadata
* Add dropmon support to libpcap, so that tcpdump/tshark could
  specifically listen on dropmon traffic, instead of capturing all
  netlink packets via nlmon interface

Changes in v3:
* Place test with the rest of the netdevsim tests
* Fix test to load netdevsim module
* Move devlink helpers from the test to devlink_lib.sh. Will be used
  by mlxsw tests
* Re-order netdevsim includes in alphabetical order
* Fix reverse xmas tree in netdevsim
* Remove double include in netdevsim

Changes in v2:
* Use drop monitor to report dropped packets instead of devlink
* Add drop monitor patches
* Add test cases
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

15 files changed, 3116 insertions, 41 deletions

diff --git a/Documentation/networking/devlink-trap-netdevsim.rst b/Documentation/networking/devlink-trap-netdevsim.rst
new file mode 100644
index 000000000000..b721c9415473
--- /dev/null
+++ b/Documentation/networking/devlink-trap-netdevsim.rst
@@ -0,0 +1,20 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+======================
+Devlink Trap netdevsim
+======================
+
+Driver-specific Traps
+=====================
+
+.. list-table:: List of Driver-specific Traps Registered by ``netdevsim``
+   :widths: 5 5 90
+
+   * - Name
+     - Type
+     - Description
+   * - ``fid_miss``
+     - ``exception``
+     - When a packet enters the device it is classified to a filtering
+       indentifier (FID) based on the ingress port and VLAN. This trap is used
+       to trap packets for which a FID could not be found
diff --git a/Documentation/networking/devlink-trap.rst b/Documentation/networking/devlink-trap.rst
new file mode 100644
index 000000000000..c20c7c483664
--- /dev/null
+++ b/Documentation/networking/devlink-trap.rst
@@ -0,0 +1,208 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+============
+Devlink Trap
+============
+
+Background
+==========
+
+Devices capable of offloading the kernel's datapath and perform functions such
+as bridging and routing must also be able to send specific packets to the
+kernel (i.e., the CPU) for processing.
+
+For example, a device acting as a multicast-aware bridge must be able to send
+IGMP membership reports to the kernel for processing by the bridge module.
+Without processing such packets, the bridge module could never populate its
+MDB.
+
+As another example, consider a device acting as router which has received an IP
+packet with a TTL of 1. Upon routing the packet the device must send it to the
+kernel so that it will route it as well and generate an ICMP Time Exceeded
+error datagram. Without letting the kernel route such packets itself, utilities
+such as ``traceroute`` could never work.
+
+The fundamental ability of sending certain packets to the kernel for processing
+is called "packet trapping".
+
+Overview
+========
+
+The ``devlink-trap`` mechanism allows capable device drivers to register their
+supported packet traps with ``devlink`` and report trapped packets to
+``devlink`` for further analysis.
+
+Upon receiving trapped packets, ``devlink`` will perform a per-trap packets and
+bytes accounting and potentially report the packet to user space via a netlink
+event along with all the provided metadata (e.g., trap reason, timestamp, input
+port). This is especially useful for drop traps (see :ref:`Trap-Types`)
+as it allows users to obtain further visibility into packet drops that would
+otherwise be invisible.
+
+The following diagram provides a general overview of ``devlink-trap``::
+
+                                    Netlink event: Packet w/ metadata
+                                                   Or a summary of recent drops
+                                  ^
+                                  |
+         Userspace                |
+        +---------------------------------------------------+
+         Kernel                   |
+                                  |
+                          +-------+--------+
+                          |                |
+                          |  drop_monitor  |
+                          |                |
+                          +-------^--------+
+                                  |
+                                  |
+                                  |
+                             +----+----+
+                             |         |      Kernel's Rx path
+                             | devlink |      (non-drop traps)
+                             |         |
+                             +----^----+      ^
+                                  |           |
+                                  +-----------+
+                                  |
+                          +-------+-------+
+                          |               |
+                          | Device driver |
+                          |               |
+                          +-------^-------+
+         Kernel                   |
+        +---------------------------------------------------+
+         Hardware                 |
+                                  | Trapped packet
+                                  |
+                               +--+---+
+                               |      |
+                               | ASIC |
+                               |      |
+                               +------+
+
+.. _Trap-Types:
+
+Trap Types
+==========
+
+The ``devlink-trap`` mechanism supports the following packet trap types:
+
+  * ``drop``: Trapped packets were dropped by the underlying device. Packets
+    are only processed by ``devlink`` and not injected to the kernel's Rx path.
+    The trap action (see :ref:`Trap-Actions`) can be changed.
+  * ``exception``: Trapped packets were not forwarded as intended by the
+    underlying device due to an exception (e.g., TTL error, missing neighbour
+    entry) and trapped to the control plane for resolution. Packets are
+    processed by ``devlink`` and injected to the kernel's Rx path. Changing the
+    action of such traps is not allowed, as it can easily break the control
+    plane.
+
+.. _Trap-Actions:
+
+Trap Actions
+============
+
+The ``devlink-trap`` mechanism supports the following packet trap actions:
+
+  * ``trap``: The sole copy of the packet is sent to the CPU.
+  * ``drop``: The packet is dropped by the underlying device and a copy is not
+    sent to the CPU.
+
+Generic Packet Traps
+====================
+
+Generic packet traps are used to describe traps that trap well-defined packets
+or packets that are trapped due to well-defined conditions (e.g., TTL error).
+Such traps can be shared by multiple device drivers and their description must
+be added to the following table:
+
+.. list-table:: List of Generic Packet Traps
+   :widths: 5 5 90
+
+   * - Name
+     - Type
+     - Description
+   * - ``source_mac_is_multicast``
+     - ``drop``
+     - Traps incoming packets that the device decided to drop because of a
+       multicast source MAC
+   * - ``vlan_tag_mismatch``
+     - ``drop``
+     - Traps incoming packets that the device decided to drop in case of VLAN
+       tag mismatch: The ingress bridge port is not configured with a PVID and
+       the packet is untagged or prio-tagged
+   * - ``ingress_vlan_filter``
+     - ``drop``
+     - Traps incoming packets that the device decided to drop in case they are
+       tagged with a VLAN that is not configured on the ingress bridge port
+   * - ``ingress_spanning_tree_filter``
+     - ``drop``
+     - Traps incoming packets that the device decided to drop in case the STP
+       state of the ingress bridge port is not "forwarding"
+   * - ``port_list_is_empty``
+     - ``drop``
+     - Traps packets that the device decided to drop in case they need to be
+       flooded and the flood list is empty
+   * - ``port_loopback_filter``
+     - ``drop``
+     - Traps packets that the device decided to drop in case after layer 2
+       forwarding the only port from which they should be transmitted through
+       is the port from which they were received
+   * - ``blackhole_route``
+     - ``drop``
+     - Traps packets that the device decided to drop in case they hit a
+       blackhole route
+   * - ``ttl_value_is_too_small``
+     - ``exception``
+     - Traps unicast packets that should be forwarded by the device whose TTL
+       was decremented to 0 or less
+   * - ``tail_drop``
+     - ``drop``
+     - Traps packets that the device decided to drop because they could not be
+       enqueued to a transmission queue which is full
+
+Driver-specific Packet Traps
+============================
+
+Device drivers can register driver-specific packet traps, but these must be
+clearly documented. Such traps can correspond to device-specific exceptions and
+help debug packet drops caused by these exceptions. The following list includes
+links to the description of driver-specific traps registered by various device
+drivers:
+
+  * :doc:`/devlink-trap-netdevsim`
+
+Generic Packet Trap Groups
+==========================
+
+Generic packet trap groups are used to aggregate logically related packet
+traps. These groups allow the user to batch operations such as setting the trap
+action of all member traps. In addition, ``devlink-trap`` can report aggregated
+per-group packets and bytes statistics, in case per-trap statistics are too
+narrow. The description of these groups must be added to the following table:
+
+.. list-table:: List of Generic Packet Trap Groups
+   :widths: 10 90
+
+   * - Name
+     - Description
+   * - ``l2_drops``
+     - Contains packet traps for packets that were dropped by the device during
+       layer 2 forwarding (i.e., bridge)
+   * - ``l3_drops``
+     - Contains packet traps for packets that were dropped by the device or hit
+       an exception (e.g., TTL error) during layer 3 forwarding
+   * - ``buffer_drops``
+     - Contains packet traps for packets that were dropped by the device due to
+       an enqueue decision
+
+Testing
+=======
+
+See ``tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh`` for a
+test covering the core infrastructure. Test cases should be added for any new
+functionality.
+
+Device drivers should focus their tests on device-specific functionality, such
+as the triggering of supported packet traps.
diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst
index a46fca264bee..37eabc17894c 100644
--- a/Documentation/networking/index.rst
+++ b/Documentation/networking/index.rst
@@ -14,6 +14,8 @@ Contents:
    device_drivers/index
    dsa/index
    devlink-info-versions
+   devlink-trap
+   devlink-trap-netdevsim
    ieee802154
    kapi
    z8530book
diff --git a/MAINTAINERS b/MAINTAINERS
index fd9ab61c2670..96d3e60697f5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11156,6 +11156,7 @@ S:	Maintained
 W:	https://fedorahosted.org/dropwatch/
 F:	net/core/drop_monitor.c
 F:	include/uapi/linux/net_dropmon.h
+F:	include/net/drop_monitor.h
 
 NETWORKING DRIVERS
 M:	"David S. Miller" <davem@davemloft.net>
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index a570da406d1d..c217049552f7 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -17,11 +17,20 @@
 
 #include <linux/debugfs.h>
 #include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/inet.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/random.h>
 #include <linux/rtnetlink.h>
+#include <linux/workqueue.h>
 #include <net/devlink.h>
+#include <net/ip.h>
+#include <uapi/linux/devlink.h>
+#include <uapi/linux/ip.h>
+#include <uapi/linux/udp.h>
 
 #include "netdevsim.h"
 
@@ -302,6 +311,218 @@ static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
 	devlink_region_destroy(nsim_dev->dummy_region);
 }
 
+struct nsim_trap_item {
+	void *trap_ctx;
+	enum devlink_trap_action action;
+};
+
+struct nsim_trap_data {
+	struct delayed_work trap_report_dw;
+	struct nsim_trap_item *trap_items_arr;
+	struct nsim_dev *nsim_dev;
+	spinlock_t trap_lock;	/* Protects trap_items_arr */
+};
+
+/* All driver-specific traps must be documented in
+ * Documentation/networking/devlink-trap-netdevsim.rst
+ */
+enum {
+	NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
+	NSIM_TRAP_ID_FID_MISS,
+};
+
+#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
+
+#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
+
+#define NSIM_TRAP_DROP(_id, _group_id)					      \
+	DEVLINK_TRAP_GENERIC(DROP, DROP, _id,				      \
+			     DEVLINK_TRAP_GROUP_GENERIC(_group_id),	      \
+			     NSIM_TRAP_METADATA)
+#define NSIM_TRAP_EXCEPTION(_id, _group_id)				      \
+	DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id,			      \
+			     DEVLINK_TRAP_GROUP_GENERIC(_group_id),	      \
+			     NSIM_TRAP_METADATA)
+#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id)			      \
+	DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id,	      \
+			    NSIM_TRAP_NAME_##_id,			      \
+			    DEVLINK_TRAP_GROUP_GENERIC(_group_id),	      \
+			    NSIM_TRAP_METADATA)
+
+static const struct devlink_trap nsim_traps_arr[] = {
+	NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
+	NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
+	NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
+	NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
+	NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
+	NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
+	NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
+	NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
+	NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS),
+	NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
+};
+
+#define NSIM_TRAP_L4_DATA_LEN 100
+
+static struct sk_buff *nsim_dev_trap_skb_build(void)
+{
+	int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
+	struct sk_buff *skb;
+	struct udphdr *udph;
+	struct ethhdr *eth;
+	struct iphdr *iph;
+
+	skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
+	if (!skb)
+		return NULL;
+	tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
+
+	eth = skb_put(skb, sizeof(struct ethhdr));
+	eth_random_addr(eth->h_dest);
+	eth_random_addr(eth->h_source);
+	eth->h_proto = htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IP);
+
+	iph = skb_put(skb, sizeof(struct iphdr));
+	iph->protocol = IPPROTO_UDP;
+	iph->saddr = in_aton("192.0.2.1");
+	iph->daddr = in_aton("198.51.100.1");
+	iph->version = 0x4;
+	iph->frag_off = 0;
+	iph->ihl = 0x5;
+	iph->tot_len = htons(tot_len);
+	iph->ttl = 100;
+	ip_send_check(iph);
+
+	udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
+	get_random_bytes(&udph->source, sizeof(u16));
+	get_random_bytes(&udph->dest, sizeof(u16));
+	udph->len = htons(sizeof(struct udphdr) + data_len);
+
+	return skb;
+}
+
+static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
+{
+	struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
+	struct devlink *devlink = priv_to_devlink(nsim_dev);
+	struct nsim_trap_data *nsim_trap_data;
+	int i;
+
+	nsim_trap_data = nsim_dev->trap_data;
+
+	spin_lock(&nsim_trap_data->trap_lock);
+	for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
+		struct nsim_trap_item *nsim_trap_item;
+		struct sk_buff *skb;
+
+		nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
+		if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
+			continue;
+
+		skb = nsim_dev_trap_skb_build();
+		if (!skb)
+			continue;
+		skb->dev = nsim_dev_port->ns->netdev;
+
+		/* Trapped packets are usually passed to devlink in softIRQ,
+		 * but in this case they are generated in a workqueue. Disable
+		 * softIRQs to prevent lockdep from complaining about
+		 * "incosistent lock state".
+		 */
+		local_bh_disable();
+		devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
+				    &nsim_dev_port->devlink_port);
+		local_bh_enable();
+		consume_skb(skb);
+	}
+	spin_unlock(&nsim_trap_data->trap_lock);
+}
+
+#define NSIM_TRAP_REPORT_INTERVAL_MS	100
+
+static void nsim_dev_trap_report_work(struct work_struct *work)
+{
+	struct nsim_trap_data *nsim_trap_data;
+	struct nsim_dev_port *nsim_dev_port;
+	struct nsim_dev *nsim_dev;
+
+	nsim_trap_data = container_of(work, struct nsim_trap_data,
+				      trap_report_dw.work);
+	nsim_dev = nsim_trap_data->nsim_dev;
+
+	/* For each running port and enabled packet trap, generate a UDP
+	 * packet with a random 5-tuple and report it.
+	 */
+	mutex_lock(&nsim_dev->port_list_lock);
+	list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
+		if (!netif_running(nsim_dev_port->ns->netdev))
+			continue;
+
+		nsim_dev_trap_report(nsim_dev_port);
+	}
+	mutex_unlock(&nsim_dev->port_list_lock);
+
+	schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
+			      msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
+}
+
+static int nsim_dev_traps_init(struct devlink *devlink)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+	struct nsim_trap_data *nsim_trap_data;
+	int err;
+
+	nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
+	if (!nsim_trap_data)
+		return -ENOMEM;
+
+	nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
+						 sizeof(struct nsim_trap_item),
+						 GFP_KERNEL);
+	if (!nsim_trap_data->trap_items_arr) {
+		err = -ENOMEM;
+		goto err_trap_data_free;
+	}
+
+	/* The lock is used to protect the action state of the registered
+	 * traps. The value is written by user and read in delayed work when
+	 * iterating over all the traps.
+	 */
+	spin_lock_init(&nsim_trap_data->trap_lock);
+	nsim_trap_data->nsim_dev = nsim_dev;
+	nsim_dev->trap_data = nsim_trap_data;
+
+	err = devlink_traps_register(devlink, nsim_traps_arr,
+				     ARRAY_SIZE(nsim_traps_arr), NULL);
+	if (err)
+		goto err_trap_items_free;
+
+	INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
+			  nsim_dev_trap_report_work);
+	schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
+			      msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
+
+	return 0;
+
+err_trap_items_free:
+	kfree(nsim_trap_data->trap_items_arr);
+err_trap_data_free:
+	kfree(nsim_trap_data);
+	return err;
+}
+
+static void nsim_dev_traps_exit(struct devlink *devlink)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+
+	cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
+	devlink_traps_unregister(devlink, nsim_traps_arr,
+				 ARRAY_SIZE(nsim_traps_arr));
+	kfree(nsim_dev->trap_data->trap_items_arr);
+	kfree(nsim_dev->trap_data);
+}
+
 static int nsim_dev_reload(struct devlink *devlink,
 			   struct netlink_ext_ack *extack)
 {
@@ -369,9 +590,61 @@ static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
 	return 0;
 }
 
+static struct nsim_trap_item *
+nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
+{
+	struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
+		if (nsim_traps_arr[i].id == trap_id)
+			return &nsim_trap_data->trap_items_arr[i];
+	}
+
+	return NULL;
+}
+
+static int nsim_dev_devlink_trap_init(struct devlink *devlink,
+				      const struct devlink_trap *trap,
+				      void *trap_ctx)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+	struct nsim_trap_item *nsim_trap_item;
+
+	nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
+	if (WARN_ON(!nsim_trap_item))
+		return -ENOENT;
+
+	nsim_trap_item->trap_ctx = trap_ctx;
+	nsim_trap_item->action = trap->init_action;
+
+	return 0;
+}
+
+static int
+nsim_dev_devlink_trap_action_set(struct devlink *devlink,
+				 const struct devlink_trap *trap,
+				 enum devlink_trap_action action)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+	struct nsim_trap_item *nsim_trap_item;
+
+	nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
+	if (WARN_ON(!nsim_trap_item))
+		return -ENOENT;
+
+	spin_lock(&nsim_dev->trap_data->trap_lock);
+	nsim_trap_item->action = action;
+	spin_unlock(&nsim_dev->trap_data->trap_lock);
+
+	return 0;
+}
+
 static const struct devlink_ops nsim_dev_devlink_ops = {
 	.reload = nsim_dev_reload,
 	.flash_update = nsim_dev_flash_update,
+	.trap_init = nsim_dev_devlink_trap_init,
+	.trap_action_set = nsim_dev_devlink_trap_action_set,
 };
 
 #define NSIM_DEV_MAX_MACS_DEFAULT 32
@@ -421,10 +694,14 @@ nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count)
 	if (err)
 		goto err_params_unregister;
 
-	err = nsim_dev_debugfs_init(nsim_dev);
+	err = nsim_dev_traps_init(devlink);
 	if (err)
 		goto err_dummy_region_exit;
 
+	err = nsim_dev_debugfs_init(nsim_dev);
+	if (err)
+		goto err_traps_exit;
+
 	err = nsim_bpf_dev_init(nsim_dev);
 	if (err)
 		goto err_debugfs_exit;
@@ -434,6 +711,8 @@ nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count)
 
 err_debugfs_exit:
 	nsim_dev_debugfs_exit(nsim_dev);
+err_traps_exit:
+	nsim_dev_traps_exit(devlink);
 err_dummy_region_exit:
 	nsim_dev_dummy_region_exit(nsim_dev);
 err_params_unregister:
@@ -456,6 +735,7 @@ static void nsim_dev_destroy(struct nsim_dev *nsim_dev)
 
 	nsim_bpf_dev_exit(nsim_dev);
 	nsim_dev_debugfs_exit(nsim_dev);
+	nsim_dev_traps_exit(devlink);
 	nsim_dev_dummy_region_exit(nsim_dev);
 	devlink_params_unregister(devlink, nsim_devlink_params,
 				  ARRAY_SIZE(nsim_devlink_params));
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index 4c758c6919f5..262a6978bbca 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -145,6 +145,7 @@ struct nsim_dev_port {
 struct nsim_dev {
 	struct nsim_bus_dev *nsim_bus_dev;
 	struct nsim_fib_data *fib_data;
+	struct nsim_trap_data *trap_data;
 	struct dentry *ddir;
 	struct dentry *ports_ddir;
 	struct bpf_offload_dev *bpf_dev;
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 451268f64880..7f43c48f54cd 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -14,6 +14,7 @@
 #include <linux/netdevice.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
+#include <linux/refcount.h>
 #include <net/net_namespace.h>
 #include <uapi/linux/devlink.h>
 
@@ -31,6 +32,8 @@ struct devlink {
 	struct list_head reporter_list;
 	struct mutex reporters_lock; /* protects reporter_list */
 	struct devlink_dpipe_headers *dpipe_headers;
+	struct list_head trap_list;
+	struct list_head trap_group_list;
 	const struct devlink_ops *ops;
 	struct device *dev;
 	possible_net_t _net;
@@ -497,6 +500,135 @@ struct devlink_health_reporter_ops {
 			struct devlink_fmsg *fmsg);
 };
 
+/**
+ * struct devlink_trap_group - Immutable packet trap group attributes.
+ * @name: Trap group name.
+ * @id: Trap group identifier.
+ * @generic: Whether the trap group is generic or not.
+ *
+ * Describes immutable attributes of packet trap groups that drivers register
+ * with devlink.
+ */
+struct devlink_trap_group {
+	const char *name;
+	u16 id;
+	bool generic;
+};
+
+#define DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT	BIT(0)
+
+/**
+ * struct devlink_trap - Immutable packet trap attributes.
+ * @type: Trap type.
+ * @init_action: Initial trap action.
+ * @generic: Whether the trap is generic or not.
+ * @id: Trap identifier.
+ * @name: Trap name.
+ * @group: Immutable packet trap group attributes.
+ * @metadata_cap: Metadata types that can be provided by the trap.
+ *
+ * Describes immutable attributes of packet traps that drivers register with
+ * devlink.
+ */
+struct devlink_trap {
+	enum devlink_trap_type type;
+	enum devlink_trap_action init_action;
+	bool generic;
+	u16 id;
+	const char *name;
+	struct devlink_trap_group group;
+	u32 metadata_cap;
+};
+
+/* All traps must be documented in
+ * Documentation/networking/devlink-trap.rst
+ */
+enum devlink_trap_generic_id {
+	DEVLINK_TRAP_GENERIC_ID_SMAC_MC,
+	DEVLINK_TRAP_GENERIC_ID_VLAN_TAG_MISMATCH,
+	DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_FILTER,
+	DEVLINK_TRAP_GENERIC_ID_INGRESS_STP_FILTER,
+	DEVLINK_TRAP_GENERIC_ID_EMPTY_TX_LIST,
+	DEVLINK_TRAP_GENERIC_ID_PORT_LOOPBACK_FILTER,
+	DEVLINK_TRAP_GENERIC_ID_BLACKHOLE_ROUTE,
+	DEVLINK_TRAP_GENERIC_ID_TTL_ERROR,
+	DEVLINK_TRAP_GENERIC_ID_TAIL_DROP,
+
+	/* Add new generic trap IDs above */
+	__DEVLINK_TRAP_GENERIC_ID_MAX,
+	DEVLINK_TRAP_GENERIC_ID_MAX = __DEVLINK_TRAP_GENERIC_ID_MAX - 1,
+};
+
+/* All trap groups must be documented in
+ * Documentation/networking/devlink-trap.rst
+ */
+enum devlink_trap_group_generic_id {
+	DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS,
+	DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS,
+	DEVLINK_TRAP_GROUP_GENERIC_ID_BUFFER_DROPS,
+
+	/* Add new generic trap group IDs above */
+	__DEVLINK_TRAP_GROUP_GENERIC_ID_MAX,
+	DEVLINK_TRAP_GROUP_GENERIC_ID_MAX =
+		__DEVLINK_TRAP_GROUP_GENERIC_ID_MAX - 1,
+};
+
+#define DEVLINK_TRAP_GENERIC_NAME_SMAC_MC \
+	"source_mac_is_multicast"
+#define DEVLINK_TRAP_GENERIC_NAME_VLAN_TAG_MISMATCH \
+	"vlan_tag_mismatch"
+#define DEVLINK_TRAP_GENERIC_NAME_INGRESS_VLAN_FILTER \
+	"ingress_vlan_filter"
+#define DEVLINK_TRAP_GENERIC_NAME_INGRESS_STP_FILTER \
+	"ingress_spanning_tree_filter"
+#define DEVLINK_TRAP_GENERIC_NAME_EMPTY_TX_LIST \
+	"port_list_is_empty"
+#define DEVLINK_TRAP_GENERIC_NAME_PORT_LOOPBACK_FILTER \
+	"port_loopback_filter"
+#define DEVLINK_TRAP_GENERIC_NAME_BLACKHOLE_ROUTE \
+	"blackhole_route"
+#define DEVLINK_TRAP_GENERIC_NAME_TTL_ERROR \
+	"ttl_value_is_too_small"
+#define DEVLINK_TRAP_GENERIC_NAME_TAIL_DROP \
+	"tail_drop"
+
+#define DEVLINK_TRAP_GROUP_GENERIC_NAME_L2_DROPS \
+	"l2_drops"
+#define DEVLINK_TRAP_GROUP_GENERIC_NAME_L3_DROPS \
+	"l3_drops"
+#define DEVLINK_TRAP_GROUP_GENERIC_NAME_BUFFER_DROPS \
+	"buffer_drops"
+
+#define DEVLINK_TRAP_GENERIC(_type, _init_action, _id, _group, _metadata_cap) \
+	{								      \
+		.type = DEVLINK_TRAP_TYPE_##_type,			      \
+		.init_action = DEVLINK_TRAP_ACTION_##_init_action,	      \
+		.generic = true,					      \
+		.id = DEVLINK_TRAP_GENERIC_ID_##_id,			      \
+		.name = DEVLINK_TRAP_GENERIC_NAME_##_id,		      \
+		.group = _group,					      \
+		.metadata_cap = _metadata_cap,				      \
+	}
+
+#define DEVLINK_TRAP_DRIVER(_type, _init_action, _id, _name, _group,	      \
+			    _metadata_cap)				      \
+	{								      \
+		.type = DEVLINK_TRAP_TYPE_##_type,			      \
+		.init_action = DEVLINK_TRAP_ACTION_##_init_action,	      \
+		.generic = false,					      \
+		.id = _id,						      \
+		.name = _name,						      \
+		.group = _group,					      \
+		.metadata_cap = _metadata_cap,				      \
+	}
+
+#define DEVLINK_TRAP_GROUP_GENERIC(_id)					      \
+	{								      \
+		.name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,		      \
+		.id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,		      \
+		.generic = true,					      \
+	}
+
 struct devlink_ops {
 	int (*reload)(struct devlink *devlink, struct netlink_ext_ack *extack);
 	int (*port_type_set)(struct devlink_port *devlink_port,
@@ -558,6 +690,38 @@ struct devlink_ops {
 	int (*flash_update)(struct devlink *devlink, const char *file_name,
 			    const char *component,
 			    struct netlink_ext_ack *extack);
+	/**
+	 * @trap_init: Trap initialization function.
+	 *
+	 * Should be used by device drivers to initialize the trap in the
+	 * underlying device. Drivers should also store the provided trap
+	 * context, so that they could efficiently pass it to
+	 * devlink_trap_report() when the trap is triggered.
+	 */
+	int (*trap_init)(struct devlink *devlink,
+			 const struct devlink_trap *trap, void *trap_ctx);
+	/**
+	 * @trap_fini: Trap de-initialization function.
+	 *
+	 * Should be used by device drivers to de-initialize the trap in the
+	 * underlying device.
+	 */
+	void (*trap_fini)(struct devlink *devlink,
+			  const struct devlink_trap *trap, void *trap_ctx);
+	/**
+	 * @trap_action_set: Trap action set function.
+	 */
+	int (*trap_action_set)(struct devlink *devlink,
+			       const struct devlink_trap *trap,
+			       enum devlink_trap_action action);
+	/**
+	 * @trap_group_init: Trap group initialization function.
+	 *
+	 * Should be used by device drivers to initialize the trap group in the
+	 * underlying device.
+	 */
+	int (*trap_group_init)(struct devlink *devlink,
+			       const struct devlink_trap_group *group);
 };
 
 static inline void *devlink_priv(struct devlink *devlink)
@@ -774,6 +938,17 @@ void devlink_flash_update_status_notify(struct devlink *devlink,
 					unsigned long done,
 					unsigned long total);
 
+int devlink_traps_register(struct devlink *devlink,
+			   const struct devlink_trap *traps,
+			   size_t traps_count, void *priv);
+void devlink_traps_unregister(struct devlink *devlink,
+			      const struct devlink_trap *traps,
+			      size_t traps_count);
+void devlink_trap_report(struct devlink *devlink,
+			 struct sk_buff *skb, void *trap_ctx,
+			 struct devlink_port *in_devlink_port);
+void *devlink_trap_ctx_priv(void *trap_ctx);
+
 #if IS_ENABLED(CONFIG_NET_DEVLINK)
 
 void devlink_compat_running_version(struct net_device *dev,
diff --git a/include/net/drop_monitor.h b/include/net/drop_monitor.h
new file mode 100644
index 000000000000..2ab668461463
--- /dev/null
+++ b/include/net/drop_monitor.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _NET_DROP_MONITOR_H_
+#define _NET_DROP_MONITOR_H_
+
+#include <linux/ktime.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+/**
+ * struct net_dm_hw_metadata - Hardware-supplied packet metadata.
+ * @trap_group_name: Hardware trap group name.
+ * @trap_name: Hardware trap name.
+ * @input_dev: Input netdevice.
+ */
+struct net_dm_hw_metadata {
+	const char *trap_group_name;
+	const char *trap_name;
+	struct net_device *input_dev;
+};
+
+#if IS_ENABLED(CONFIG_NET_DROP_MONITOR)
+void net_dm_hw_report(struct sk_buff *skb,
+		      const struct net_dm_hw_metadata *hw_metadata);
+#else
+static inline void
+net_dm_hw_report(struct sk_buff *skb,
+		 const struct net_dm_hw_metadata *hw_metadata)
+{
+}
+#endif
+
+#endif /* _NET_DROP_MONITOR_H_ */
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index ffc993256527..546e75dd74ac 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -107,6 +107,16 @@ enum devlink_command {
 	DEVLINK_CMD_FLASH_UPDATE_END,		/* notification only */
 	DEVLINK_CMD_FLASH_UPDATE_STATUS,	/* notification only */
 
+	DEVLINK_CMD_TRAP_GET,		/* can dump */
+	DEVLINK_CMD_TRAP_SET,
+	DEVLINK_CMD_TRAP_NEW,
+	DEVLINK_CMD_TRAP_DEL,
+
+	DEVLINK_CMD_TRAP_GROUP_GET,	/* can dump */
+	DEVLINK_CMD_TRAP_GROUP_SET,
+	DEVLINK_CMD_TRAP_GROUP_NEW,
+	DEVLINK_CMD_TRAP_GROUP_DEL,
+
 	/* add new commands above here */
 	__DEVLINK_CMD_MAX,
 	DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
@@ -194,6 +204,47 @@ enum devlink_param_fw_load_policy_value {
 	DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH,
 };
 
+enum {
+	DEVLINK_ATTR_STATS_RX_PACKETS,		/* u64 */
+	DEVLINK_ATTR_STATS_RX_BYTES,		/* u64 */
+
+	__DEVLINK_ATTR_STATS_MAX,
+	DEVLINK_ATTR_STATS_MAX = __DEVLINK_ATTR_STATS_MAX - 1
+};
+
+/**
+ * enum devlink_trap_action - Packet trap action.
+ * @DEVLINK_TRAP_ACTION_DROP: Packet is dropped by the device and a copy is not
+ *                            sent to the CPU.
+ * @DEVLINK_TRAP_ACTION_TRAP: The sole copy of the packet is sent to the CPU.
+ */
+enum devlink_trap_action {
+	DEVLINK_TRAP_ACTION_DROP,
+	DEVLINK_TRAP_ACTION_TRAP,
+};
+
+/**
+ * enum devlink_trap_type - Packet trap type.
+ * @DEVLINK_TRAP_TYPE_DROP: Trap reason is a drop. Trapped packets are only
+ *                          processed by devlink and not injected to the
+ *                          kernel's Rx path.
+ * @DEVLINK_TRAP_TYPE_EXCEPTION: Trap reason is an exception. Packet was not
+ *                               forwarded as intended due to an exception
+ *                               (e.g., missing neighbour entry) and trapped to
+ *                               control plane for resolution. Trapped packets
+ *                               are processed by devlink and injected to
+ *                               the kernel's Rx path.
+ */
+enum devlink_trap_type {
+	DEVLINK_TRAP_TYPE_DROP,
+	DEVLINK_TRAP_TYPE_EXCEPTION,
+};
+
+enum {
+	/* Trap can report input port as metadata */
+	DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT,
+};
+
 enum devlink_attr {
 	/* don't change the order or add anything between, this is ABI! */
 	DEVLINK_ATTR_UNSPEC,
@@ -348,6 +399,17 @@ enum devlink_attr {
 	DEVLINK_ATTR_PORT_PCI_PF_NUMBER,	/* u16 */
 	DEVLINK_ATTR_PORT_PCI_VF_NUMBER,	/* u16 */
 
+	DEVLINK_ATTR_STATS,				/* nested */
+
+	DEVLINK_ATTR_TRAP_NAME,				/* string */
+	/* enum devlink_trap_action */
+	DEVLINK_ATTR_TRAP_ACTION,			/* u8 */
+	/* enum devlink_trap_type */
+	DEVLINK_ATTR_TRAP_TYPE,				/* u8 */
+	DEVLINK_ATTR_TRAP_GENERIC,			/* flag */
+	DEVLINK_ATTR_TRAP_METADATA,			/* nested */
+	DEVLINK_ATTR_TRAP_GROUP_NAME,			/* string */
+
 	/* add new attributes above here, update the policy in devlink.c */
 
 	__DEVLINK_ATTR_MAX,
diff --git a/include/uapi/linux/net_dropmon.h b/include/uapi/linux/net_dropmon.h
index 405b31cbf723..75a35dccb675 100644
--- a/include/uapi/linux/net_dropmon.h
+++ b/include/uapi/linux/net_dropmon.h
@@ -83,6 +83,15 @@ enum net_dm_attr {
 	NET_DM_ATTR_ORIG_LEN,			/* u32 */
 	NET_DM_ATTR_QUEUE_LEN,			/* u32 */
 	NET_DM_ATTR_STATS,			/* nested */
+	NET_DM_ATTR_HW_STATS,			/* nested */
+	NET_DM_ATTR_ORIGIN,			/* u16 */
+	NET_DM_ATTR_HW_TRAP_GROUP_NAME,		/* string */
+	NET_DM_ATTR_HW_TRAP_NAME,		/* string */
+	NET_DM_ATTR_HW_ENTRIES,			/* nested */
+	NET_DM_ATTR_HW_ENTRY,			/* nested */
+	NET_DM_ATTR_HW_TRAP_COUNT,		/* u32 */
+	NET_DM_ATTR_SW_DROPS,			/* flag */
+	NET_DM_ATTR_HW_DROPS,			/* flag */
 
 	__NET_DM_ATTR_MAX,
 	NET_DM_ATTR_MAX = __NET_DM_ATTR_MAX - 1
@@ -101,6 +110,7 @@ enum net_dm_alert_mode {
 
 enum {
 	NET_DM_ATTR_PORT_NETDEV_IFINDEX,	/* u32 */
+	NET_DM_ATTR_PORT_NETDEV_NAME,		/* string */
 
 	__NET_DM_ATTR_PORT_MAX,
 	NET_DM_ATTR_PORT_MAX = __NET_DM_ATTR_PORT_MAX - 1
@@ -113,4 +123,9 @@ enum {
 	NET_DM_ATTR_STATS_MAX = __NET_DM_ATTR_STATS_MAX - 1
 };
 
+enum net_dm_origin {
+	NET_DM_ORIGIN_SW,
+	NET_DM_ORIGIN_HW,
+};
+
 #endif
diff --git a/net/Kconfig b/net/Kconfig
index 57f51a279ad6..3101bfcbdd7a 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -430,6 +430,7 @@ config NET_SOCK_MSG
 config NET_DEVLINK
 	bool
 	default n
+	imply NET_DROP_MONITOR
 
 config PAGE_POOL
        bool
diff --git a/net/core/devlink.c b/net/core/devlink.c
index d3dbb904bf3b..650f36379203 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -18,6 +18,8 @@
 #include <linux/spinlock.h>
 #include <linux/refcount.h>
 #include <linux/workqueue.h>
+#include <linux/u64_stats_sync.h>
+#include <linux/timekeeping.h>
 #include <rdma/ib_verbs.h>
 #include <net/netlink.h>
 #include <net/genetlink.h>
@@ -25,6 +27,7 @@
 #include <net/net_namespace.h>
 #include <net/sock.h>
 #include <net/devlink.h>
+#include <net/drop_monitor.h>
 #define CREATE_TRACE_POINTS
 #include <trace/events/devlink.h>
 
@@ -551,7 +554,7 @@ static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 	if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 		goto nla_put_failure;
 
-	spin_lock(&devlink_port->type_lock);
+	spin_lock_bh(&devlink_port->type_lock);
 	if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
 		goto nla_put_failure_type_locked;
 	if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
@@ -576,7 +579,7 @@ static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 				   ibdev->name))
 			goto nla_put_failure_type_locked;
 	}
-	spin_unlock(&devlink_port->type_lock);
+	spin_unlock_bh(&devlink_port->type_lock);
 	if (devlink_nl_port_attrs_put(msg, devlink_port))
 		goto nla_put_failure;
 
@@ -584,7 +587,7 @@ static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 	return 0;
 
 nla_put_failure_type_locked:
-	spin_unlock(&devlink_port->type_lock);
+	spin_unlock_bh(&devlink_port->type_lock);
 nla_put_failure:
 	genlmsg_cancel(msg, hdr);
 	return -EMSGSIZE;
@@ -5154,6 +5157,571 @@ devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
 	return 0;
 }
 
+struct devlink_stats {
+	u64 rx_bytes;
+	u64 rx_packets;
+	struct u64_stats_sync syncp;
+};
+
+/**
+ * struct devlink_trap_group_item - Packet trap group attributes.
+ * @group: Immutable packet trap group attributes.
+ * @refcount: Number of trap items using the group.
+ * @list: trap_group_list member.
+ * @stats: Trap group statistics.
+ *
+ * Describes packet trap group attributes. Created by devlink during trap
+ * registration.
+ */
+struct devlink_trap_group_item {
+	const struct devlink_trap_group *group;
+	refcount_t refcount;
+	struct list_head list;
+	struct devlink_stats __percpu *stats;
+};
+
+/**
+ * struct devlink_trap_item - Packet trap attributes.
+ * @trap: Immutable packet trap attributes.
+ * @group_item: Associated group item.
+ * @list: trap_list member.
+ * @action: Trap action.
+ * @stats: Trap statistics.
+ * @priv: Driver private information.
+ *
+ * Describes both mutable and immutable packet trap attributes. Created by
+ * devlink during trap registration and used for all trap related operations.
+ */
+struct devlink_trap_item {
+	const struct devlink_trap *trap;
+	struct devlink_trap_group_item *group_item;
+	struct list_head list;
+	enum devlink_trap_action action;
+	struct devlink_stats __percpu *stats;
+	void *priv;
+};
+
+static struct devlink_trap_item *
+devlink_trap_item_lookup(struct devlink *devlink, const char *name)
+{
+	struct devlink_trap_item *trap_item;
+
+	list_for_each_entry(trap_item, &devlink->trap_list, list) {
+		if (!strcmp(trap_item->trap->name, name))
+			return trap_item;
+	}
+
+	return NULL;
+}
+
+static struct devlink_trap_item *
+devlink_trap_item_get_from_info(struct devlink *devlink,
+				struct genl_info *info)
+{
+	struct nlattr *attr;
+
+	if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
+		return NULL;
+	attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
+
+	return devlink_trap_item_lookup(devlink, nla_data(attr));
+}
+
+static int
+devlink_trap_action_get_from_info(struct genl_info *info,
+				  enum devlink_trap_action *p_trap_action)
+{
+	u8 val;
+
+	val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
+	switch (val) {
+	case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
+	case DEVLINK_TRAP_ACTION_TRAP:
+		*p_trap_action = val;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int devlink_trap_metadata_put(struct sk_buff *msg,
+				     const struct devlink_trap *trap)
+{
+	struct nlattr *attr;
+
+	attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
+	if (!attr)
+		return -EMSGSIZE;
+
+	if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
+	    nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
+		goto nla_put_failure;
+
+	nla_nest_end(msg, attr);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(msg, attr);
+	return -EMSGSIZE;
+}
+
+static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
+				    struct devlink_stats *stats)
+{
+	int i;
+
+	memset(stats, 0, sizeof(*stats));
+	for_each_possible_cpu(i) {
+		struct devlink_stats *cpu_stats;
+		u64 rx_packets, rx_bytes;
+		unsigned int start;
+
+		cpu_stats = per_cpu_ptr(trap_stats, i);
+		do {
+			start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
+			rx_packets = cpu_stats->rx_packets;
+			rx_bytes = cpu_stats->rx_bytes;
+		} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
+
+		stats->rx_packets += rx_packets;
+		stats->rx_bytes += rx_bytes;
+	}
+}
+
+static int devlink_trap_stats_put(struct sk_buff *msg,
+				  struct devlink_stats __percpu *trap_stats)
+{
+	struct devlink_stats stats;
+	struct nlattr *attr;
+
+	devlink_trap_stats_read(trap_stats, &stats);
+
+	attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
+	if (!attr)
+		return -EMSGSIZE;
+
+	if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
+			      stats.rx_packets, DEVLINK_ATTR_PAD))
+		goto nla_put_failure;
+
+	if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
+			      stats.rx_bytes, DEVLINK_ATTR_PAD))
+		goto nla_put_failure;
+
+	nla_nest_end(msg, attr);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(msg, attr);
+	return -EMSGSIZE;
+}
+
+static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
+				const struct devlink_trap_item *trap_item,
+				enum devlink_command cmd, u32 portid, u32 seq,
+				int flags)
+{
+	struct devlink_trap_group_item *group_item = trap_item->group_item;
+	void *hdr;
+	int err;
+
+	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (devlink_nl_put_handle(msg, devlink))
+		goto nla_put_failure;
+
+	if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
+			   group_item->group->name))
+		goto nla_put_failure;
+
+	if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
+		goto nla_put_failure;
+
+	if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
+		goto nla_put_failure;
+
+	if (trap_item->trap->generic &&
+	    nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
+		goto nla_put_failure;
+
+	if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
+		goto nla_put_failure;
+
+	err = devlink_trap_metadata_put(msg, trap_item->trap);
+	if (err)
+		goto nla_put_failure;
+
+	err = devlink_trap_stats_put(msg, trap_item->stats);
+	if (err)
+		goto nla_put_failure;
+
+	genlmsg_end(msg, hdr);
+
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
+					struct genl_info *info)
+{
+	struct netlink_ext_ack *extack = info->extack;
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_trap_item *trap_item;
+	struct sk_buff *msg;
+	int err;
+
+	if (list_empty(&devlink->trap_list))
+		return -EOPNOTSUPP;
+
+	trap_item = devlink_trap_item_get_from_info(devlink, info);
+	if (!trap_item) {
+		NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
+		return -ENOENT;
+	}
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	err = devlink_nl_trap_fill(msg, devlink, trap_item,
+				   DEVLINK_CMD_TRAP_NEW, info->snd_portid,
+				   info->snd_seq, 0);
+	if (err)
+		goto err_trap_fill;
+
+	return genlmsg_reply(msg, info);
+
+err_trap_fill:
+	nlmsg_free(msg);
+	return err;
+}
+
+static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
+					  struct netlink_callback *cb)
+{
+	struct devlink_trap_item *trap_item;
+	struct devlink *devlink;
+	int start = cb->args[0];
+	int idx = 0;
+	int err;
+
+	mutex_lock(&devlink_mutex);
+	list_for_each_entry(devlink, &devlink_list, list) {
+		if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
+			continue;
+		mutex_lock(&devlink->lock);
+		list_for_each_entry(trap_item, &devlink->trap_list, list) {
+			if (idx < start) {
+				idx++;
+				continue;
+			}
+			err = devlink_nl_trap_fill(msg, devlink, trap_item,
+						   DEVLINK_CMD_TRAP_NEW,
+						   NETLINK_CB(cb->skb).portid,
+						   cb->nlh->nlmsg_seq,
+						   NLM_F_MULTI);
+			if (err) {
+				mutex_unlock(&devlink->lock);
+				goto out;
+			}
+			idx++;
+		}
+		mutex_unlock(&devlink->lock);
+	}
+out:
+	mutex_unlock(&devlink_mutex);
+
+	cb->args[0] = idx;
+	return msg->len;
+}
+
+static int __devlink_trap_action_set(struct devlink *devlink,
+				     struct devlink_trap_item *trap_item,
+				     enum devlink_trap_action trap_action,
+				     struct netlink_ext_ack *extack)
+{
+	int err;
+
+	if (trap_item->action != trap_action &&
+	    trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
+		return 0;
+	}
+
+	err = devlink->ops->trap_action_set(devlink, trap_item->trap,
+					    trap_action);
+	if (err)
+		return err;
+
+	trap_item->action = trap_action;
+
+	return 0;
+}
+
+static int devlink_trap_action_set(struct devlink *devlink,
+				   struct devlink_trap_item *trap_item,
+				   struct genl_info *info)
+{
+	enum devlink_trap_action trap_action;
+	int err;
+
+	if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
+		return 0;
+
+	err = devlink_trap_action_get_from_info(info, &trap_action);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
+		return -EINVAL;
+	}
+
+	return __devlink_trap_action_set(devlink, trap_item, trap_action,
+					 info->extack);
+}
+
+static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
+					struct genl_info *info)
+{
+	struct netlink_ext_ack *extack = info->extack;
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_trap_item *trap_item;
+	int err;
+
+	if (list_empty(&devlink->trap_list))
+		return -EOPNOTSUPP;
+
+	trap_item = devlink_trap_item_get_from_info(devlink, info);
+	if (!trap_item) {
+		NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
+		return -ENOENT;
+	}
+
+	err = devlink_trap_action_set(devlink, trap_item, info);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static struct devlink_trap_group_item *
+devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
+{
+	struct devlink_trap_group_item *group_item;
+
+	list_for_each_entry(group_item, &devlink->trap_group_list, list) {
+		if (!strcmp(group_item->group->name, name))
+			return group_item;
+	}
+
+	return NULL;
+}
+
+static struct devlink_trap_group_item *
+devlink_trap_group_item_get_from_info(struct devlink *devlink,
+				      struct genl_info *info)
+{
+	char *name;
+
+	if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
+		return NULL;
+	name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
+
+	return devlink_trap_group_item_lookup(devlink, name);
+}
+
+static int
+devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
+			   const struct devlink_trap_group_item *group_item,
+			   enum devlink_command cmd, u32 portid, u32 seq,
+			   int flags)
+{
+	void *hdr;
+	int err;
+
+	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (devlink_nl_put_handle(msg, devlink))
+		goto nla_put_failure;
+
+	if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
+			   group_item->group->name))
+		goto nla_put_failure;
+
+	if (group_item->group->generic &&
+	    nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
+		goto nla_put_failure;
+
+	err = devlink_trap_stats_put(msg, group_item->stats);
+	if (err)
+		goto nla_put_failure;
+
+	genlmsg_end(msg, hdr);
+
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
+					      struct genl_info *info)
+{
+	struct netlink_ext_ack *extack = info->extack;
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_trap_group_item *group_item;
+	struct sk_buff *msg;
+	int err;
+
+	if (list_empty(&devlink->trap_group_list))
+		return -EOPNOTSUPP;
+
+	group_item = devlink_trap_group_item_get_from_info(devlink, info);
+	if (!group_item) {
+		NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
+		return -ENOENT;
+	}
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	err = devlink_nl_trap_group_fill(msg, devlink, group_item,
+					 DEVLINK_CMD_TRAP_GROUP_NEW,
+					 info->snd_portid, info->snd_seq, 0);
+	if (err)
+		goto err_trap_group_fill;
+
+	return genlmsg_reply(msg, info);
+
+err_trap_group_fill:
+	nlmsg_free(msg);
+	return err;
+}
+
+static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
+						struct netlink_callback *cb)
+{
+	enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
+	struct devlink_trap_group_item *group_item;
+	u32 portid = NETLINK_CB(cb->skb).portid;
+	struct devlink *devlink;
+	int start = cb->args[0];
+	int idx = 0;
+	int err;
+
+	mutex_lock(&devlink_mutex);
+	list_for_each_entry(devlink, &devlink_list, list) {
+		if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
+			continue;
+		mutex_lock(&devlink->lock);
+		list_for_each_entry(group_item, &devlink->trap_group_list,
+				    list) {
+			if (idx < start) {
+				idx++;
+				continue;
+			}
+			err = devlink_nl_trap_group_fill(msg, devlink,
+							 group_item, cmd,
+							 portid,
+							 cb->nlh->nlmsg_seq,
+							 NLM_F_MULTI);
+			if (err) {
+				mutex_unlock(&devlink->lock);
+				goto out;
+			}
+			idx++;
+		}
+		mutex_unlock(&devlink->lock);
+	}
+out:
+	mutex_unlock(&devlink_mutex);
+
+	cb->args[0] = idx;
+	return msg->len;
+}
+
+static int
+__devlink_trap_group_action_set(struct devlink *devlink,
+				struct devlink_trap_group_item *group_item,
+				enum devlink_trap_action trap_action,
+				struct netlink_ext_ack *extack)
+{
+	const char *group_name = group_item->group->name;
+	struct devlink_trap_item *trap_item;
+	int err;
+
+	list_for_each_entry(trap_item, &devlink->trap_list, list) {
+		if (strcmp(trap_item->trap->group.name, group_name))
+			continue;
+		err = __devlink_trap_action_set(devlink, trap_item,
+						trap_action, extack);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int
+devlink_trap_group_action_set(struct devlink *devlink,
+			      struct devlink_trap_group_item *group_item,
+			      struct genl_info *info)
+{
+	enum devlink_trap_action trap_action;
+	int err;
+
+	if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
+		return 0;
+
+	err = devlink_trap_action_get_from_info(info, &trap_action);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
+		return -EINVAL;
+	}
+
+	err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
+					      info->extack);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
+					      struct genl_info *info)
+{
+	struct netlink_ext_ack *extack = info->extack;
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_trap_group_item *group_item;
+	int err;
+
+	if (list_empty(&devlink->trap_group_list))
+		return -EOPNOTSUPP;
+
+	group_item = devlink_trap_group_item_get_from_info(devlink, info);
+	if (!group_item) {
+		NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
+		return -ENOENT;
+	}
+
+	err = devlink_trap_group_action_set(devlink, group_item, info);
+	if (err)
+		return err;
+
+	return 0;
+}
+
 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
 	[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
 	[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@@ -5184,6 +5752,9 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
 	[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
 	[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
 	[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
+	[DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
+	[DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
+	[DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
 };
 
 static const struct genl_ops devlink_nl_ops[] = {
@@ -5483,6 +6054,32 @@ static const struct genl_ops devlink_nl_ops[] = {
 		.flags = GENL_ADMIN_PERM,
 		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
 	},
+	{
+		.cmd = DEVLINK_CMD_TRAP_GET,
+		.doit = devlink_nl_cmd_trap_get_doit,
+		.dumpit = devlink_nl_cmd_trap_get_dumpit,
+		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
+		/* can be retrieved by unprivileged users */
+	},
+	{
+		.cmd = DEVLINK_CMD_TRAP_SET,
+		.doit = devlink_nl_cmd_trap_set_doit,
+		.flags = GENL_ADMIN_PERM,
+		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
+	},
+	{
+		.cmd = DEVLINK_CMD_TRAP_GROUP_GET,
+		.doit = devlink_nl_cmd_trap_group_get_doit,
+		.dumpit = devlink_nl_cmd_trap_group_get_dumpit,
+		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
+		/* can be retrieved by unprivileged users */
+	},
+	{
+		.cmd = DEVLINK_CMD_TRAP_GROUP_SET,
+		.doit = devlink_nl_cmd_trap_group_set_doit,
+		.flags = GENL_ADMIN_PERM,
+		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
+	},
 };
 
 static struct genl_family devlink_nl_family __ro_after_init = {
@@ -5528,6 +6125,8 @@ struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
 	INIT_LIST_HEAD(&devlink->param_list);
 	INIT_LIST_HEAD(&devlink->region_list);
 	INIT_LIST_HEAD(&devlink->reporter_list);
+	INIT_LIST_HEAD(&devlink->trap_list);
+	INIT_LIST_HEAD(&devlink->trap_group_list);
 	mutex_init(&devlink->lock);
 	mutex_init(&devlink->reporters_lock);
 	return devlink;
@@ -5574,6 +6173,8 @@ void devlink_free(struct devlink *devlink)
 {
 	mutex_destroy(&devlink->reporters_lock);
 	mutex_destroy(&devlink->lock);
+	WARN_ON(!list_empty(&devlink->trap_group_list));
+	WARN_ON(!list_empty(&devlink->trap_list));
 	WARN_ON(!list_empty(&devlink->reporter_list));
 	WARN_ON(!list_empty(&devlink->region_list));
 	WARN_ON(!list_empty(&devlink->param_list));
@@ -5678,10 +6279,10 @@ static void __devlink_port_type_set(struct devlink_port *devlink_port,
 	if (WARN_ON(!devlink_port->registered))
 		return;
 	devlink_port_type_warn_cancel(devlink_port);
-	spin_lock(&devlink_port->type_lock);
+	spin_lock_bh(&devlink_port->type_lock);
 	devlink_port->type = type;
 	devlink_port->type_dev = type_dev;
-	spin_unlock(&devlink_port->type_lock);
+	spin_unlock_bh(&devlink_port->type_lock);
 	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 }
 
@@ -6834,6 +7435,475 @@ unlock:
 }
 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
 
+#define DEVLINK_TRAP(_id, _type)					      \
+	{								      \
+		.type = DEVLINK_TRAP_TYPE_##_type,			      \
+		.id = DEVLINK_TRAP_GENERIC_ID_##_id,			      \
+		.name = DEVLINK_TRAP_GENERIC_NAME_##_id,		      \
+	}
+
+static const struct devlink_trap devlink_trap_generic[] = {
+	DEVLINK_TRAP(SMAC_MC, DROP),
+	DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
+	DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
+	DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
+	DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
+	DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
+	DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
+	DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
+	DEVLINK_TRAP(TAIL_DROP, DROP),
+};
+
+#define DEVLINK_TRAP_GROUP(_id)						      \
+	{								      \
+		.id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,		      \
+		.name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,		      \
+	}
+
+static const struct devlink_trap_group devlink_trap_group_generic[] = {
+	DEVLINK_TRAP_GROUP(L2_DROPS),
+	DEVLINK_TRAP_GROUP(L3_DROPS),
+	DEVLINK_TRAP_GROUP(BUFFER_DROPS),
+};
+
+static int devlink_trap_generic_verify(const struct devlink_trap *trap)
+{
+	if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
+		return -EINVAL;
+
+	if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
+		return -EINVAL;
+
+	if (trap->type != devlink_trap_generic[trap->id].type)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int devlink_trap_driver_verify(const struct devlink_trap *trap)
+{
+	int i;
+
+	if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
+		return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
+		if (!strcmp(trap->name, devlink_trap_generic[i].name))
+			return -EEXIST;
+	}
+
+	return 0;
+}
+
+static int devlink_trap_verify(const struct devlink_trap *trap)
+{
+	if (!trap || !trap->name || !trap->group.name)
+		return -EINVAL;
+
+	if (trap->generic)
+		return devlink_trap_generic_verify(trap);
+	else
+		return devlink_trap_driver_verify(trap);
+}
+
+static int
+devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
+{
+	if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
+		return -EINVAL;
+
+	if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int
+devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
+{
+	int i;
+
+	if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
+		return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
+		if (!strcmp(group->name, devlink_trap_group_generic[i].name))
+			return -EEXIST;
+	}
+
+	return 0;
+}
+
+static int devlink_trap_group_verify(const struct devlink_trap_group *group)
+{
+	if (group->generic)
+		return devlink_trap_group_generic_verify(group);
+	else
+		return devlink_trap_group_driver_verify(group);
+}
+
+static void
+devlink_trap_group_notify(struct devlink *devlink,
+			  const struct devlink_trap_group_item *group_item,
+			  enum devlink_command cmd)
+{
+	struct sk_buff *msg;
+	int err;
+
+	WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
+		     cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return;
+
+	err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
+					 0);
+	if (err) {
+		nlmsg_free(msg);
+		return;
+	}
+
+	genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+				msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static struct devlink_trap_group_item *
+devlink_trap_group_item_create(struct devlink *devlink,
+			       const struct devlink_trap_group *group)
+{
+	struct devlink_trap_group_item *group_item;
+	int err;
+
+	err = devlink_trap_group_verify(group);
+	if (err)
+		return ERR_PTR(err);
+
+	group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
+	if (!group_item)
+		return ERR_PTR(-ENOMEM);
+
+	group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
+	if (!group_item->stats) {
+		err = -ENOMEM;
+		goto err_stats_alloc;
+	}
+
+	group_item->group = group;
+	refcount_set(&group_item->refcount, 1);
+
+	if (devlink->ops->trap_group_init) {
+		err = devlink->ops->trap_group_init(devlink, group);
+		if (err)
+			goto err_group_init;
+	}
+
+	list_add_tail(&group_item->list, &devlink->trap_group_list);
+	devlink_trap_group_notify(devlink, group_item,
+				  DEVLINK_CMD_TRAP_GROUP_NEW);
+
+	return group_item;
+
+err_group_init:
+	free_percpu(group_item->stats);
+err_stats_alloc:
+	kfree(group_item);
+	return ERR_PTR(err);
+}
+
+static void
+devlink_trap_group_item_destroy(struct devlink *devlink,
+				struct devlink_trap_group_item *group_item)
+{
+	devlink_trap_group_notify(devlink, group_item,
+				  DEVLINK_CMD_TRAP_GROUP_DEL);
+	list_del(&group_item->list);
+	free_percpu(group_item->stats);
+	kfree(group_item);
+}
+
+static struct devlink_trap_group_item *
+devlink_trap_group_item_get(struct devlink *devlink,
+			    const struct devlink_trap_group *group)
+{
+	struct devlink_trap_group_item *group_item;
+
+	group_item = devlink_trap_group_item_lookup(devlink, group->name);
+	if (group_item) {
+		refcount_inc(&group_item->refcount);
+		return group_item;
+	}
+
+	return devlink_trap_group_item_create(devlink, group);
+}
+
+static void
+devlink_trap_group_item_put(struct devlink *devlink,
+			    struct devlink_trap_group_item *group_item)
+{
+	if (!refcount_dec_and_test(&group_item->refcount))
+		return;
+
+	devlink_trap_group_item_destroy(devlink, group_item);
+}
+
+static int
+devlink_trap_item_group_link(struct devlink *devlink,
+			     struct devlink_trap_item *trap_item)
+{
+	struct devlink_trap_group_item *group_item;
+
+	group_item = devlink_trap_group_item_get(devlink,
+						 &trap_item->trap->group);
+	if (IS_ERR(group_item))
+		return PTR_ERR(group_item);
+
+	trap_item->group_item = group_item;
+
+	return 0;
+}
+
+static void
+devlink_trap_item_group_unlink(struct devlink *devlink,
+			       struct devlink_trap_item *trap_item)
+{
+	devlink_trap_group_item_put(devlink, trap_item->group_item);
+}
+
+static void devlink_trap_notify(struct devlink *devlink,
+				const struct devlink_trap_item *trap_item,
+				enum devlink_command cmd)
+{
+	struct sk_buff *msg;
+	int err;
+
+	WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
+		     cmd != DEVLINK_CMD_TRAP_DEL);
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return;
+
+	err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
+	if (err) {
+		nlmsg_free(msg);
+		return;
+	}
+
+	genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+				msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static int
+devlink_trap_register(struct devlink *devlink,
+		      const struct devlink_trap *trap, void *priv)
+{
+	struct devlink_trap_item *trap_item;
+	int err;
+
+	if (devlink_trap_item_lookup(devlink, trap->name))
+		return -EEXIST;
+
+	trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
+	if (!trap_item)
+		return -ENOMEM;
+
+	trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
+	if (!trap_item->stats) {
+		err = -ENOMEM;
+		goto err_stats_alloc;
+	}
+
+	trap_item->trap = trap;
+	trap_item->action = trap->init_action;
+	trap_item->priv = priv;
+
+	err = devlink_trap_item_group_link(devlink, trap_item);
+	if (err)
+		goto err_group_link;
+
+	err = devlink->ops->trap_init(devlink, trap, trap_item);
+	if (err)
+		goto err_trap_init;
+
+	list_add_tail(&trap_item->list, &devlink->trap_list);
+	devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
+
+	return 0;
+
+err_trap_init:
+	devlink_trap_item_group_unlink(devlink, trap_item);
+err_group_link:
+	free_percpu(trap_item->stats);
+err_stats_alloc:
+	kfree(trap_item);
+	return err;
+}
+
+static void devlink_trap_unregister(struct devlink *devlink,
+				    const struct devlink_trap *trap)
+{
+	struct devlink_trap_item *trap_item;
+
+	trap_item = devlink_trap_item_lookup(devlink, trap->name);
+	if (WARN_ON_ONCE(!trap_item))
+		return;
+
+	devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
+	list_del(&trap_item->list);
+	if (devlink->ops->trap_fini)
+		devlink->ops->trap_fini(devlink, trap, trap_item);
+	devlink_trap_item_group_unlink(devlink, trap_item);
+	free_percpu(trap_item->stats);
+	kfree(trap_item);
+}
+
+static void devlink_trap_disable(struct devlink *devlink,
+				 const struct devlink_trap *trap)
+{
+	struct devlink_trap_item *trap_item;
+
+	trap_item = devlink_trap_item_lookup(devlink, trap->name);
+	if (WARN_ON_ONCE(!trap_item))
+		return;
+
+	devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
+	trap_item->action = DEVLINK_TRAP_ACTION_DROP;
+}
+
+/**
+ * devlink_traps_register - Register packet traps with devlink.
+ * @devlink: devlink.
+ * @traps: Packet traps.
+ * @traps_count: Count of provided packet traps.
+ * @priv: Driver private information.
+ *
+ * Return: Non-zero value on failure.
+ */
+int devlink_traps_register(struct devlink *devlink,
+			   const struct devlink_trap *traps,
+			   size_t traps_count, void *priv)
+{
+	int i, err;
+
+	if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
+		return -EINVAL;
+
+	mutex_lock(&devlink->lock);
+	for (i = 0; i < traps_count; i++) {
+		const struct devlink_trap *trap = &traps[i];
+
+		err = devlink_trap_verify(trap);
+		if (err)
+			goto err_trap_verify;
+
+		err = devlink_trap_register(devlink, trap, priv);
+		if (err)
+			goto err_trap_register;
+	}
+	mutex_unlock(&devlink->lock);
+
+	return 0;
+
+err_trap_register:
+err_trap_verify:
+	for (i--; i >= 0; i--)
+		devlink_trap_unregister(devlink, &traps[i]);
+	mutex_unlock(&devlink->lock);
+	return err;
+}
+EXPORT_SYMBOL_GPL(devlink_traps_register);
+
+/**
+ * devlink_traps_unregister - Unregister packet traps from devlink.
+ * @devlink: devlink.
+ * @traps: Packet traps.
+ * @traps_count: Count of provided packet traps.
+ */
+void devlink_traps_unregister(struct devlink *devlink,
+			      const struct devlink_trap *traps,
+			      size_t traps_count)
+{
+	int i;
+
+	mutex_lock(&devlink->lock);
+	/* Make sure we do not have any packets in-flight while unregistering
+	 * traps by disabling all of them and waiting for a grace period.
+	 */
+	for (i = traps_count - 1; i >= 0; i--)
+		devlink_trap_disable(devlink, &traps[i]);
+	synchronize_rcu();
+	for (i = traps_count - 1; i >= 0; i--)
+		devlink_trap_unregister(devlink, &traps[i]);
+	mutex_unlock(&devlink->lock);
+}
+EXPORT_SYMBOL_GPL(devlink_traps_unregister);
+
+static void
+devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
+			  size_t skb_len)
+{
+	struct devlink_stats *stats;
+
+	stats = this_cpu_ptr(trap_stats);
+	u64_stats_update_begin(&stats->syncp);
+	stats->rx_bytes += skb_len;
+	stats->rx_packets++;
+	u64_stats_update_end(&stats->syncp);
+}
+
+static void
+devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
+				  const struct devlink_trap_item *trap_item,
+				  struct devlink_port *in_devlink_port)
+{
+	struct devlink_trap_group_item *group_item = trap_item->group_item;
+
+	hw_metadata->trap_group_name = group_item->group->name;
+	hw_metadata->trap_name = trap_item->trap->name;
+
+	spin_lock(&in_devlink_port->type_lock);
+	if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
+		hw_metadata->input_dev = in_devlink_port->type_dev;
+	spin_unlock(&in_devlink_port->type_lock);
+}
+
+/**
+ * devlink_trap_report - Report trapped packet to drop monitor.
+ * @devlink: devlink.
+ * @skb: Trapped packet.
+ * @trap_ctx: Trap context.
+ * @in_devlink_port: Input devlink port.
+ */
+void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
+			 void *trap_ctx, struct devlink_port *in_devlink_port)
+{
+	struct devlink_trap_item *trap_item = trap_ctx;
+	struct net_dm_hw_metadata hw_metadata = {};
+
+	devlink_trap_stats_update(trap_item->stats, skb->len);
+	devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
+
+	devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
+					  in_devlink_port);
+	net_dm_hw_report(skb, &hw_metadata);
+}
+EXPORT_SYMBOL_GPL(devlink_trap_report);
+
+/**
+ * devlink_trap_ctx_priv - Trap context to driver private information.
+ * @trap_ctx: Trap context.
+ *
+ * Return: Driver private information passed during registration.
+ */
+void *devlink_trap_ctx_priv(void *trap_ctx)
+{
+	struct devlink_trap_item *trap_item = trap_ctx;
+
+	return trap_item->priv;
+}
+EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
+
 static void __devlink_compat_running_version(struct devlink *devlink,
 					     char *buf, size_t len)
 {
diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index 39e094907391..bfc024024aa3 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -26,6 +26,7 @@
 #include <linux/bitops.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <net/drop_monitor.h>
 #include <net/genetlink.h>
 #include <net/netevent.h>
 
@@ -43,6 +44,7 @@
  * netlink alerts
  */
 static int trace_state = TRACE_OFF;
+static bool monitor_hw;
 
 /* net_dm_mutex
  *
@@ -56,9 +58,26 @@ struct net_dm_stats {
 	struct u64_stats_sync syncp;
 };
 
+#define NET_DM_MAX_HW_TRAP_NAME_LEN 40
+
+struct net_dm_hw_entry {
+	char trap_name[NET_DM_MAX_HW_TRAP_NAME_LEN];
+	u32 count;
+};
+
+struct net_dm_hw_entries {
+	u32 num_entries;
+	struct net_dm_hw_entry entries[0];
+};
+
 struct per_cpu_dm_data {
-	spinlock_t		lock;	/* Protects 'skb' and 'send_timer' */
-	struct sk_buff		*skb;
+	spinlock_t		lock;	/* Protects 'skb', 'hw_entries' and
+					 * 'send_timer'
+					 */
+	union {
+		struct sk_buff			*skb;
+		struct net_dm_hw_entries	*hw_entries;
+	};
 	struct sk_buff_head	drop_queue;
 	struct work_struct	dm_alert_work;
 	struct timer_list	send_timer;
@@ -76,6 +95,7 @@ struct dm_hw_stat_delta {
 static struct genl_family net_drop_monitor_family;
 
 static DEFINE_PER_CPU(struct per_cpu_dm_data, dm_cpu_data);
+static DEFINE_PER_CPU(struct per_cpu_dm_data, dm_hw_cpu_data);
 
 static int dm_hit_limit = 64;
 static int dm_delay = 1;
@@ -92,10 +112,16 @@ struct net_dm_alert_ops {
 	void (*napi_poll_probe)(void *ignore, struct napi_struct *napi,
 				int work, int budget);
 	void (*work_item_func)(struct work_struct *work);
+	void (*hw_work_item_func)(struct work_struct *work);
+	void (*hw_probe)(struct sk_buff *skb,
+			 const struct net_dm_hw_metadata *hw_metadata);
 };
 
 struct net_dm_skb_cb {
-	void *pc;
+	union {
+		struct net_dm_hw_metadata *hw_metadata;
+		void *pc;
+	};
 };
 
 #define NET_DM_SKB_CB(__skb) ((struct net_dm_skb_cb *)&((__skb)->cb[0]))
@@ -266,10 +292,190 @@ static void trace_napi_poll_hit(void *ignore, struct napi_struct *napi,
 	rcu_read_unlock();
 }
 
+static struct net_dm_hw_entries *
+net_dm_hw_reset_per_cpu_data(struct per_cpu_dm_data *hw_data)
+{
+	struct net_dm_hw_entries *hw_entries;
+	unsigned long flags;
+
+	hw_entries = kzalloc(struct_size(hw_entries, entries, dm_hit_limit),
+			     GFP_KERNEL);
+	if (!hw_entries) {
+		/* If the memory allocation failed, we try to perform another
+		 * allocation in 1/10 second. Otherwise, the probe function
+		 * will constantly bail out.
+		 */
+		mod_timer(&hw_data->send_timer, jiffies + HZ / 10);
+	}
+
+	spin_lock_irqsave(&hw_data->lock, flags);
+	swap(hw_data->hw_entries, hw_entries);
+	spin_unlock_irqrestore(&hw_data->lock, flags);
+
+	return hw_entries;
+}
+
+static int net_dm_hw_entry_put(struct sk_buff *msg,
+			       const struct net_dm_hw_entry *hw_entry)
+{
+	struct nlattr *attr;
+
+	attr = nla_nest_start(msg, NET_DM_ATTR_HW_ENTRY);
+	if (!attr)
+		return -EMSGSIZE;
+
+	if (nla_put_string(msg, NET_DM_ATTR_HW_TRAP_NAME, hw_entry->trap_name))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, NET_DM_ATTR_HW_TRAP_COUNT, hw_entry->count))
+		goto nla_put_failure;
+
+	nla_nest_end(msg, attr);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(msg, attr);
+	return -EMSGSIZE;
+}
+
+static int net_dm_hw_entries_put(struct sk_buff *msg,
+				 const struct net_dm_hw_entries *hw_entries)
+{
+	struct nlattr *attr;
+	int i;
+
+	attr = nla_nest_start(msg, NET_DM_ATTR_HW_ENTRIES);
+	if (!attr)
+		return -EMSGSIZE;
+
+	for (i = 0; i < hw_entries->num_entries; i++) {
+		int rc;
+
+		rc = net_dm_hw_entry_put(msg, &hw_entries->entries[i]);
+		if (rc)
+			goto nla_put_failure;
+	}
+
+	nla_nest_end(msg, attr);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(msg, attr);
+	return -EMSGSIZE;
+}
+
+static int
+net_dm_hw_summary_report_fill(struct sk_buff *msg,
+			      const struct net_dm_hw_entries *hw_entries)
+{
+	struct net_dm_alert_msg anc_hdr = { 0 };
+	void *hdr;
+	int rc;
+
+	hdr = genlmsg_put(msg, 0, 0, &net_drop_monitor_family, 0,
+			  NET_DM_CMD_ALERT);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	/* We need to put the ancillary header in order not to break user
+	 * space.
+	 */
+	if (nla_put(msg, NLA_UNSPEC, sizeof(anc_hdr), &anc_hdr))
+		goto nla_put_failure;
+
+	rc = net_dm_hw_entries_put(msg, hw_entries);
+	if (rc)
+		goto nla_put_failure;
+
+	genlmsg_end(msg, hdr);
+
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+static void net_dm_hw_summary_work(struct work_struct *work)
+{
+	struct net_dm_hw_entries *hw_entries;
+	struct per_cpu_dm_data *hw_data;
+	struct sk_buff *msg;
+	int rc;
+
+	hw_data = container_of(work, struct per_cpu_dm_data, dm_alert_work);
+
+	hw_entries = net_dm_hw_reset_per_cpu_data(hw_data);
+	if (!hw_entries)
+		return;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		goto out;
+
+	rc = net_dm_hw_summary_report_fill(msg, hw_entries);
+	if (rc) {
+		nlmsg_free(msg);
+		goto out;
+	}
+
+	genlmsg_multicast(&net_drop_monitor_family, msg, 0, 0, GFP_KERNEL);
+
+out:
+	kfree(hw_entries);
+}
+
+static void
+net_dm_hw_summary_probe(struct sk_buff *skb,
+			const struct net_dm_hw_metadata *hw_metadata)
+{
+	struct net_dm_hw_entries *hw_entries;
+	struct net_dm_hw_entry *hw_entry;
+	struct per_cpu_dm_data *hw_data;
+	unsigned long flags;
+	int i;
+
+	hw_data = this_cpu_ptr(&dm_hw_cpu_data);
+	spin_lock_irqsave(&hw_data->lock, flags);
+	hw_entries = hw_data->hw_entries;
+
+	if (!hw_entries)
+		goto out;
+
+	for (i = 0; i < hw_entries->num_entries; i++) {
+		hw_entry = &hw_entries->entries[i];
+		if (!strncmp(hw_entry->trap_name, hw_metadata->trap_name,
+			     NET_DM_MAX_HW_TRAP_NAME_LEN - 1)) {
+			hw_entry->count++;
+			goto out;
+		}
+	}
+	if (WARN_ON_ONCE(hw_entries->num_entries == dm_hit_limit))
+		goto out;
+
+	hw_entry = &hw_entries->entries[hw_entries->num_entries];
+	strlcpy(hw_entry->trap_name, hw_metadata->trap_name,
+		NET_DM_MAX_HW_TRAP_NAME_LEN - 1);
+	hw_entry->count = 1;
+	hw_entries->num_entries++;
+
+	if (!timer_pending(&hw_data->send_timer)) {
+		hw_data->send_timer.expires = jiffies + dm_delay * HZ;
+		add_timer(&hw_data->send_timer);
+	}
+
+out:
+	spin_unlock_irqrestore(&hw_data->lock, flags);
+}
+
 static const struct net_dm_alert_ops net_dm_alert_summary_ops = {
 	.kfree_skb_probe	= trace_kfree_skb_hit,
 	.napi_poll_probe	= trace_napi_poll_hit,
 	.work_item_func		= send_dm_alert,
+	.hw_work_item_func	= net_dm_hw_summary_work,
+	.hw_probe		= net_dm_hw_summary_probe,
 };
 
 static void net_dm_packet_trace_kfree_skb_hit(void *ignore,
@@ -323,7 +529,9 @@ static size_t net_dm_in_port_size(void)
 	       /* NET_DM_ATTR_IN_PORT nest */
 	return nla_total_size(0) +
 	       /* NET_DM_ATTR_PORT_NETDEV_IFINDEX */
-	       nla_total_size(sizeof(u32));
+	       nla_total_size(sizeof(u32)) +
+	       /* NET_DM_ATTR_PORT_NETDEV_NAME */
+	       nla_total_size(IFNAMSIZ + 1);
 }
 
 #define NET_DM_MAX_SYMBOL_LEN 40
@@ -335,6 +543,8 @@ static size_t net_dm_packet_report_size(size_t payload_len)
 	size = nlmsg_msg_size(GENL_HDRLEN + net_drop_monitor_family.hdrsize);
 
 	return NLMSG_ALIGN(size) +
+	       /* NET_DM_ATTR_ORIGIN */
+	       nla_total_size(sizeof(u16)) +
 	       /* NET_DM_ATTR_PC */
 	       nla_total_size(sizeof(u64)) +
 	       /* NET_DM_ATTR_SYMBOL */
@@ -351,7 +561,8 @@ static size_t net_dm_packet_report_size(size_t payload_len)
 	       nla_total_size(payload_len);
 }
 
-static int net_dm_packet_report_in_port_put(struct sk_buff *msg, int ifindex)
+static int net_dm_packet_report_in_port_put(struct sk_buff *msg, int ifindex,
+					    const char *name)
 {
 	struct nlattr *attr;
 
@@ -363,6 +574,9 @@ static int net_dm_packet_report_in_port_put(struct sk_buff *msg, int ifindex)
 	    nla_put_u32(msg, NET_DM_ATTR_PORT_NETDEV_IFINDEX, ifindex))
 		goto nla_put_failure;
 
+	if (name && nla_put_string(msg, NET_DM_ATTR_PORT_NETDEV_NAME, name))
+		goto nla_put_failure;
+
 	nla_nest_end(msg, attr);
 
 	return 0;
@@ -387,6 +601,9 @@ static int net_dm_packet_report_fill(struct sk_buff *msg, struct sk_buff *skb,
 	if (!hdr)
 		return -EMSGSIZE;
 
+	if (nla_put_u16(msg, NET_DM_ATTR_ORIGIN, NET_DM_ORIGIN_SW))
+		goto nla_put_failure;
+
 	if (nla_put_u64_64bit(msg, NET_DM_ATTR_PC, pc, NET_DM_ATTR_PAD))
 		goto nla_put_failure;
 
@@ -394,7 +611,7 @@ static int net_dm_packet_report_fill(struct sk_buff *msg, struct sk_buff *skb,
 	if (nla_put_string(msg, NET_DM_ATTR_SYMBOL, buf))
 		goto nla_put_failure;
 
-	rc = net_dm_packet_report_in_port_put(msg, skb->skb_iif);
+	rc = net_dm_packet_report_in_port_put(msg, skb->skb_iif, NULL);
 	if (rc)
 		goto nla_put_failure;
 
@@ -481,10 +698,250 @@ static void net_dm_packet_work(struct work_struct *work)
 		net_dm_packet_report(skb);
 }
 
+static size_t
+net_dm_hw_packet_report_size(size_t payload_len,
+			     const struct net_dm_hw_metadata *hw_metadata)
+{
+	size_t size;
+
+	size = nlmsg_msg_size(GENL_HDRLEN + net_drop_monitor_family.hdrsize);
+
+	return NLMSG_ALIGN(size) +
+	       /* NET_DM_ATTR_ORIGIN */
+	       nla_total_size(sizeof(u16)) +
+	       /* NET_DM_ATTR_HW_TRAP_GROUP_NAME */
+	       nla_total_size(strlen(hw_metadata->trap_group_name) + 1) +
+	       /* NET_DM_ATTR_HW_TRAP_NAME */
+	       nla_total_size(strlen(hw_metadata->trap_name) + 1) +
+	       /* NET_DM_ATTR_IN_PORT */
+	       net_dm_in_port_size() +
+	       /* NET_DM_ATTR_TIMESTAMP */
+	       nla_total_size(sizeof(struct timespec)) +
+	       /* NET_DM_ATTR_ORIG_LEN */
+	       nla_total_size(sizeof(u32)) +
+	       /* NET_DM_ATTR_PROTO */
+	       nla_total_size(sizeof(u16)) +
+	       /* NET_DM_ATTR_PAYLOAD */
+	       nla_total_size(payload_len);
+}
+
+static int net_dm_hw_packet_report_fill(struct sk_buff *msg,
+					struct sk_buff *skb, size_t payload_len)
+{
+	struct net_dm_hw_metadata *hw_metadata;
+	struct nlattr *attr;
+	struct timespec ts;
+	void *hdr;
+
+	hw_metadata = NET_DM_SKB_CB(skb)->hw_metadata;
+
+	hdr = genlmsg_put(msg, 0, 0, &net_drop_monitor_family, 0,
+			  NET_DM_CMD_PACKET_ALERT);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (nla_put_u16(msg, NET_DM_ATTR_ORIGIN, NET_DM_ORIGIN_HW))
+		goto nla_put_failure;
+
+	if (nla_put_string(msg, NET_DM_ATTR_HW_TRAP_GROUP_NAME,
+			   hw_metadata->trap_group_name))
+		goto nla_put_failure;
+
+	if (nla_put_string(msg, NET_DM_ATTR_HW_TRAP_NAME,
+			   hw_metadata->trap_name))
+		goto nla_put_failure;
+
+	if (hw_metadata->input_dev) {
+		struct net_device *dev = hw_metadata->input_dev;
+		int rc;
+
+		rc = net_dm_packet_report_in_port_put(msg, dev->ifindex,
+						      dev->name);
+		if (rc)
+			goto nla_put_failure;
+	}
+
+	if (ktime_to_timespec_cond(skb->tstamp, &ts) &&
+	    nla_put(msg, NET_DM_ATTR_TIMESTAMP, sizeof(ts), &ts))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, NET_DM_ATTR_ORIG_LEN, skb->len))
+		goto nla_put_failure;
+
+	if (!payload_len)
+		goto out;
+
+	if (nla_put_u16(msg, NET_DM_ATTR_PROTO, be16_to_cpu(skb->protocol)))
+		goto nla_put_failure;
+
+	attr = skb_put(msg, nla_total_size(payload_len));
+	attr->nla_type = NET_DM_ATTR_PAYLOAD;
+	attr->nla_len = nla_attr_size(payload_len);
+	if (skb_copy_bits(skb, 0, nla_data(attr), payload_len))
+		goto nla_put_failure;
+
+out:
+	genlmsg_end(msg, hdr);
+
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+static struct net_dm_hw_metadata *
+net_dm_hw_metadata_clone(const struct net_dm_hw_metadata *hw_metadata)
+{
+	struct net_dm_hw_metadata *n_hw_metadata;
+	const char *trap_group_name;
+	const char *trap_name;
+
+	n_hw_metadata = kmalloc(sizeof(*hw_metadata), GFP_ATOMIC);
+	if (!n_hw_metadata)
+		return NULL;
+
+	trap_group_name = kmemdup(hw_metadata->trap_group_name,
+				  strlen(hw_metadata->trap_group_name) + 1,
+				  GFP_ATOMIC | __GFP_ZERO);
+	if (!trap_group_name)
+		goto free_hw_metadata;
+	n_hw_metadata->trap_group_name = trap_group_name;
+
+	trap_name = kmemdup(hw_metadata->trap_name,
+			    strlen(hw_metadata->trap_name) + 1,
+			    GFP_ATOMIC | __GFP_ZERO);
+	if (!trap_name)
+		goto free_trap_group;
+	n_hw_metadata->trap_name = trap_name;
+
+	n_hw_metadata->input_dev = hw_metadata->input_dev;
+	if (n_hw_metadata->input_dev)
+		dev_hold(n_hw_metadata->input_dev);
+
+	return n_hw_metadata;
+
+free_trap_group:
+	kfree(trap_group_name);
+free_hw_metadata:
+	kfree(n_hw_metadata);
+	return NULL;
+}
+
+static void
+net_dm_hw_metadata_free(const struct net_dm_hw_metadata *hw_metadata)
+{
+	if (hw_metadata->input_dev)
+		dev_put(hw_metadata->input_dev);
+	kfree(hw_metadata->trap_name);
+	kfree(hw_metadata->trap_group_name);
+	kfree(hw_metadata);
+}
+
+static void net_dm_hw_packet_report(struct sk_buff *skb)
+{
+	struct net_dm_hw_metadata *hw_metadata;
+	struct sk_buff *msg;
+	size_t payload_len;
+	int rc;
+
+	if (skb->data > skb_mac_header(skb))
+		skb_push(skb, skb->data - skb_mac_header(skb));
+	else
+		skb_pull(skb, skb_mac_header(skb) - skb->data);
+
+	payload_len = min_t(size_t, skb->len, NET_DM_MAX_PACKET_SIZE);
+	if (net_dm_trunc_len)
+		payload_len = min_t(size_t, net_dm_trunc_len, payload_len);
+
+	hw_metadata = NET_DM_SKB_CB(skb)->hw_metadata;
+	msg = nlmsg_new(net_dm_hw_packet_report_size(payload_len, hw_metadata),
+			GFP_KERNEL);
+	if (!msg)
+		goto out;
+
+	rc = net_dm_hw_packet_report_fill(msg, skb, payload_len);
+	if (rc) {
+		nlmsg_free(msg);
+		goto out;
+	}
+
+	genlmsg_multicast(&net_drop_monitor_family, msg, 0, 0, GFP_KERNEL);
+
+out:
+	net_dm_hw_metadata_free(NET_DM_SKB_CB(skb)->hw_metadata);
+	consume_skb(skb);
+}
+
+static void net_dm_hw_packet_work(struct work_struct *work)
+{
+	struct per_cpu_dm_data *hw_data;
+	struct sk_buff_head list;
+	struct sk_buff *skb;
+	unsigned long flags;
+
+	hw_data = container_of(work, struct per_cpu_dm_data, dm_alert_work);
+
+	__skb_queue_head_init(&list);
+
+	spin_lock_irqsave(&hw_data->drop_queue.lock, flags);
+	skb_queue_splice_tail_init(&hw_data->drop_queue, &list);
+	spin_unlock_irqrestore(&hw_data->drop_queue.lock, flags);
+
+	while ((skb = __skb_dequeue(&list)))
+		net_dm_hw_packet_report(skb);
+}
+
+static void
+net_dm_hw_packet_probe(struct sk_buff *skb,
+		       const struct net_dm_hw_metadata *hw_metadata)
+{
+	struct net_dm_hw_metadata *n_hw_metadata;
+	ktime_t tstamp = ktime_get_real();
+	struct per_cpu_dm_data *hw_data;
+	struct sk_buff *nskb;
+	unsigned long flags;
+
+	nskb = skb_clone(skb, GFP_ATOMIC);
+	if (!nskb)
+		return;
+
+	n_hw_metadata = net_dm_hw_metadata_clone(hw_metadata);
+	if (!n_hw_metadata)
+		goto free;
+
+	NET_DM_SKB_CB(nskb)->hw_metadata = n_hw_metadata;
+	nskb->tstamp = tstamp;
+
+	hw_data = this_cpu_ptr(&dm_hw_cpu_data);
+
+	spin_lock_irqsave(&hw_data->drop_queue.lock, flags);
+	if (skb_queue_len(&hw_data->drop_queue) < net_dm_queue_len)
+		__skb_queue_tail(&hw_data->drop_queue, nskb);
+	else
+		goto unlock_free;
+	spin_unlock_irqrestore(&hw_data->drop_queue.lock, flags);
+
+	schedule_work(&hw_data->dm_alert_work);
+
+	return;
+
+unlock_free:
+	spin_unlock_irqrestore(&hw_data->drop_queue.lock, flags);
+	u64_stats_update_begin(&hw_data->stats.syncp);
+	hw_data->stats.dropped++;
+	u64_stats_update_end(&hw_data->stats.syncp);
+	net_dm_hw_metadata_free(n_hw_metadata);
+free:
+	consume_skb(nskb);
+}
+
 static const struct net_dm_alert_ops net_dm_alert_packet_ops = {
 	.kfree_skb_probe	= net_dm_packet_trace_kfree_skb_hit,
 	.napi_poll_probe	= net_dm_packet_trace_napi_poll_hit,
 	.work_item_func		= net_dm_packet_work,
+	.hw_work_item_func	= net_dm_hw_packet_work,
+	.hw_probe		= net_dm_hw_packet_probe,
 };
 
 static const struct net_dm_alert_ops *net_dm_alert_ops_arr[] = {
@@ -492,6 +949,85 @@ static const struct net_dm_alert_ops *net_dm_alert_ops_arr[] = {
 	[NET_DM_ALERT_MODE_PACKET]	= &net_dm_alert_packet_ops,
 };
 
+void net_dm_hw_report(struct sk_buff *skb,
+		      const struct net_dm_hw_metadata *hw_metadata)
+{
+	rcu_read_lock();
+
+	if (!monitor_hw)
+		goto out;
+
+	net_dm_alert_ops_arr[net_dm_alert_mode]->hw_probe(skb, hw_metadata);
+
+out:
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(net_dm_hw_report);
+
+static int net_dm_hw_monitor_start(struct netlink_ext_ack *extack)
+{
+	const struct net_dm_alert_ops *ops;
+	int cpu;
+
+	if (monitor_hw) {
+		NL_SET_ERR_MSG_MOD(extack, "Hardware monitoring already enabled");
+		return -EAGAIN;
+	}
+
+	ops = net_dm_alert_ops_arr[net_dm_alert_mode];
+
+	if (!try_module_get(THIS_MODULE)) {
+		NL_SET_ERR_MSG_MOD(extack, "Failed to take reference on module");
+		return -ENODEV;
+	}
+
+	for_each_possible_cpu(cpu) {
+		struct per_cpu_dm_data *hw_data = &per_cpu(dm_hw_cpu_data, cpu);
+		struct net_dm_hw_entries *hw_entries;
+
+		INIT_WORK(&hw_data->dm_alert_work, ops->hw_work_item_func);
+		timer_setup(&hw_data->send_timer, sched_send_work, 0);
+		hw_entries = net_dm_hw_reset_per_cpu_data(hw_data);
+		kfree(hw_entries);
+	}
+
+	monitor_hw = true;
+
+	return 0;
+}
+
+static void net_dm_hw_monitor_stop(struct netlink_ext_ack *extack)
+{
+	int cpu;
+
+	if (!monitor_hw)
+		NL_SET_ERR_MSG_MOD(extack, "Hardware monitoring already disabled");
+
+	monitor_hw = false;
+
+	/* After this call returns we are guaranteed that no CPU is processing
+	 * any hardware drops.
+	 */
+	synchronize_rcu();
+
+	for_each_possible_cpu(cpu) {
+		struct per_cpu_dm_data *hw_data = &per_cpu(dm_hw_cpu_data, cpu);
+		struct sk_buff *skb;
+
+		del_timer_sync(&hw_data->send_timer);
+		cancel_work_sync(&hw_data->dm_alert_work);
+		while ((skb = __skb_dequeue(&hw_data->drop_queue))) {
+			struct net_dm_hw_metadata *hw_metadata;
+
+			hw_metadata = NET_DM_SKB_CB(skb)->hw_metadata;
+			net_dm_hw_metadata_free(hw_metadata);
+			consume_skb(skb);
+		}
+	}
+
+	module_put(THIS_MODULE);
+}
+
 static int net_dm_trace_on_set(struct netlink_ext_ack *extack)
 {
 	const struct net_dm_alert_ops *ops;
@@ -604,6 +1140,11 @@ static int set_all_monitor_traces(int state, struct netlink_ext_ack *extack)
 	return rc;
 }
 
+static bool net_dm_is_monitoring(void)
+{
+	return trace_state == TRACE_ON || monitor_hw;
+}
+
 static int net_dm_alert_mode_get_from_info(struct genl_info *info,
 					   enum net_dm_alert_mode *p_alert_mode)
 {
@@ -665,8 +1206,8 @@ static int net_dm_cmd_config(struct sk_buff *skb,
 	struct netlink_ext_ack *extack = info->extack;
 	int rc;
 
-	if (trace_state == TRACE_ON) {
-		NL_SET_ERR_MSG_MOD(extack, "Cannot configure drop monitor while tracing is on");
+	if (net_dm_is_monitoring()) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot configure drop monitor during monitoring");
 		return -EBUSY;
 	}
 
@@ -681,14 +1222,61 @@ static int net_dm_cmd_config(struct sk_buff *skb,
 	return 0;
 }
 
+static int net_dm_monitor_start(bool set_sw, bool set_hw,
+				struct netlink_ext_ack *extack)
+{
+	bool sw_set = false;
+	int rc;
+
+	if (set_sw) {
+		rc = set_all_monitor_traces(TRACE_ON, extack);
+		if (rc)
+			return rc;
+		sw_set = true;
+	}
+
+	if (set_hw) {
+		rc = net_dm_hw_monitor_start(extack);
+		if (rc)
+			goto err_monitor_hw;
+	}
+
+	return 0;
+
+err_monitor_hw:
+	if (sw_set)
+		set_all_monitor_traces(TRACE_OFF, extack);
+	return rc;
+}
+
+static void net_dm_monitor_stop(bool set_sw, bool set_hw,
+				struct netlink_ext_ack *extack)
+{
+	if (set_hw)
+		net_dm_hw_monitor_stop(extack);
+	if (set_sw)
+		set_all_monitor_traces(TRACE_OFF, extack);
+}
+
 static int net_dm_cmd_trace(struct sk_buff *skb,
 			struct genl_info *info)
 {
+	bool set_sw = !!info->attrs[NET_DM_ATTR_SW_DROPS];
+	bool set_hw = !!info->attrs[NET_DM_ATTR_HW_DROPS];
+	struct netlink_ext_ack *extack = info->extack;
+
+	/* To maintain backward compatibility, we start / stop monitoring of
+	 * software drops if no flag is specified.
+	 */
+	if (!set_sw && !set_hw)
+		set_sw = true;
+
 	switch (info->genlhdr->cmd) {
 	case NET_DM_CMD_START:
-		return set_all_monitor_traces(TRACE_ON, info->extack);
+		return net_dm_monitor_start(set_sw, set_hw, extack);
 	case NET_DM_CMD_STOP:
-		return set_all_monitor_traces(TRACE_OFF, info->extack);
+		net_dm_monitor_stop(set_sw, set_hw, extack);
+		return 0;
 	}
 
 	return -EOPNOTSUPP;
@@ -785,6 +1373,50 @@ nla_put_failure:
 	return -EMSGSIZE;
 }
 
+static void net_dm_hw_stats_read(struct net_dm_stats *stats)
+{
+	int cpu;
+
+	memset(stats, 0, sizeof(*stats));
+	for_each_possible_cpu(cpu) {
+		struct per_cpu_dm_data *hw_data = &per_cpu(dm_hw_cpu_data, cpu);
+		struct net_dm_stats *cpu_stats = &hw_data->stats;
+		unsigned int start;
+		u64 dropped;
+
+		do {
+			start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
+			dropped = cpu_stats->dropped;
+		} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
+
+		stats->dropped += dropped;
+	}
+}
+
+static int net_dm_hw_stats_put(struct sk_buff *msg)
+{
+	struct net_dm_stats stats;
+	struct nlattr *attr;
+
+	net_dm_hw_stats_read(&stats);
+
+	attr = nla_nest_start(msg, NET_DM_ATTR_HW_STATS);
+	if (!attr)
+		return -EMSGSIZE;
+
+	if (nla_put_u64_64bit(msg, NET_DM_ATTR_STATS_DROPPED,
+			      stats.dropped, NET_DM_ATTR_PAD))
+		goto nla_put_failure;
+
+	nla_nest_end(msg, attr);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(msg, attr);
+	return -EMSGSIZE;
+}
+
 static int net_dm_stats_fill(struct sk_buff *msg, struct genl_info *info)
 {
 	void *hdr;
@@ -799,6 +1431,10 @@ static int net_dm_stats_fill(struct sk_buff *msg, struct genl_info *info)
 	if (rc)
 		goto nla_put_failure;
 
+	rc = net_dm_hw_stats_put(msg);
+	if (rc)
+		goto nla_put_failure;
+
 	genlmsg_end(msg, hdr);
 
 	return 0;
@@ -872,6 +1508,8 @@ static const struct nla_policy net_dm_nl_policy[NET_DM_ATTR_MAX + 1] = {
 	[NET_DM_ATTR_ALERT_MODE] = { .type = NLA_U8 },
 	[NET_DM_ATTR_TRUNC_LEN] = { .type = NLA_U32 },
 	[NET_DM_ATTR_QUEUE_LEN] = { .type = NLA_U32 },
+	[NET_DM_ATTR_SW_DROPS]	= {. type = NLA_FLAG },
+	[NET_DM_ATTR_HW_DROPS]	= {. type = NLA_FLAG },
 };
 
 static const struct genl_ops dropmon_ops[] = {
@@ -934,9 +1572,57 @@ static struct notifier_block dropmon_net_notifier = {
 	.notifier_call = dropmon_net_event
 };
 
-static int __init init_net_drop_monitor(void)
+static void __net_dm_cpu_data_init(struct per_cpu_dm_data *data)
+{
+	spin_lock_init(&data->lock);
+	skb_queue_head_init(&data->drop_queue);
+	u64_stats_init(&data->stats.syncp);
+}
+
+static void __net_dm_cpu_data_fini(struct per_cpu_dm_data *data)
+{
+	WARN_ON(!skb_queue_empty(&data->drop_queue));
+}
+
+static void net_dm_cpu_data_init(int cpu)
 {
 	struct per_cpu_dm_data *data;
+
+	data = &per_cpu(dm_cpu_data, cpu);
+	__net_dm_cpu_data_init(data);
+}
+
+static void net_dm_cpu_data_fini(int cpu)
+{
+	struct per_cpu_dm_data *data;
+
+	data = &per_cpu(dm_cpu_data, cpu);
+	/* At this point, we should have exclusive access
+	 * to this struct and can free the skb inside it.
+	 */
+	consume_skb(data->skb);
+	__net_dm_cpu_data_fini(data);
+}
+
+static void net_dm_hw_cpu_data_init(int cpu)
+{
+	struct per_cpu_dm_data *hw_data;
+
+	hw_data = &per_cpu(dm_hw_cpu_data, cpu);
+	__net_dm_cpu_data_init(hw_data);
+}
+
+static void net_dm_hw_cpu_data_fini(int cpu)
+{
+	struct per_cpu_dm_data *hw_data;
+
+	hw_data = &per_cpu(dm_hw_cpu_data, cpu);
+	kfree(hw_data->hw_entries);
+	__net_dm_cpu_data_fini(hw_data);
+}
+
+static int __init init_net_drop_monitor(void)
+{
 	int cpu, rc;
 
 	pr_info("Initializing network drop monitor service\n");
@@ -962,10 +1648,8 @@ static int __init init_net_drop_monitor(void)
 	rc = 0;
 
 	for_each_possible_cpu(cpu) {
-		data = &per_cpu(dm_cpu_data, cpu);
-		spin_lock_init(&data->lock);
-		skb_queue_head_init(&data->drop_queue);
-		u64_stats_init(&data->stats.syncp);
+		net_dm_cpu_data_init(cpu);
+		net_dm_hw_cpu_data_init(cpu);
 	}
 
 	goto out;
@@ -978,7 +1662,6 @@ out:
 
 static void exit_net_drop_monitor(void)
 {
-	struct per_cpu_dm_data *data;
 	int cpu;
 
 	BUG_ON(unregister_netdevice_notifier(&dropmon_net_notifier));
@@ -989,13 +1672,8 @@ static void exit_net_drop_monitor(void)
 	 */
 
 	for_each_possible_cpu(cpu) {
-		data = &per_cpu(dm_cpu_data, cpu);
-		/*
-		 * At this point, we should have exclusive access
-		 * to this struct and can free the skb inside it
-		 */
-		kfree_skb(data->skb);
-		WARN_ON(!skb_queue_empty(&data->drop_queue));
+		net_dm_hw_cpu_data_fini(cpu);
+		net_dm_cpu_data_fini(cpu);
 	}
 
 	BUG_ON(genl_unregister_family(&net_drop_monitor_family));
diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
new file mode 100755
index 000000000000..f101ab9441e2
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
@@ -0,0 +1,364 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# This test is for checking devlink-trap functionality. It makes use of
+# netdevsim which implements the required callbacks.
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+	init_test
+	trap_action_test
+	trap_metadata_test
+	bad_trap_test
+	bad_trap_action_test
+	trap_stats_test
+	trap_group_action_test
+	bad_trap_group_test
+	trap_group_stats_test
+	port_del_test
+	dev_del_test
+"
+NETDEVSIM_PATH=/sys/bus/netdevsim/
+DEV_ADDR=1337
+DEV=netdevsim${DEV_ADDR}
+DEVLINK_DEV=netdevsim/${DEV}
+SLEEP_TIME=1
+NETDEV=""
+NUM_NETIFS=0
+source $lib_dir/lib.sh
+source $lib_dir/devlink_lib.sh
+
+require_command udevadm
+
+modprobe netdevsim &> /dev/null
+if [ ! -d "$NETDEVSIM_PATH" ]; then
+	echo "SKIP: No netdevsim support"
+	exit 1
+fi
+
+if [ -d "${NETDEVSIM_PATH}/devices/netdevsim${DEV_ADDR}" ]; then
+	echo "SKIP: Device netdevsim${DEV_ADDR} already exists"
+	exit 1
+fi
+
+init_test()
+{
+	RET=0
+
+	test $(devlink_traps_num_get) -ne 0
+	check_err $? "No traps were registered"
+
+	log_test "Initialization"
+}
+
+trap_action_test()
+{
+	local orig_action
+	local trap_name
+	local action
+
+	RET=0
+
+	for trap_name in $(devlink_traps_get); do
+		# The action of non-drop traps cannot be changed.
+		if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then
+			devlink_trap_action_set $trap_name "trap"
+			action=$(devlink_trap_action_get $trap_name)
+			if [ $action != "trap" ]; then
+				check_err 1 "Trap $trap_name did not change action to trap"
+			fi
+
+			devlink_trap_action_set $trap_name "drop"
+			action=$(devlink_trap_action_get $trap_name)
+			if [ $action != "drop" ]; then
+				check_err 1 "Trap $trap_name did not change action to drop"
+			fi
+		else
+			orig_action=$(devlink_trap_action_get $trap_name)
+
+			devlink_trap_action_set $trap_name "trap"
+			action=$(devlink_trap_action_get $trap_name)
+			if [ $action != $orig_action ]; then
+				check_err 1 "Trap $trap_name changed action when should not"
+			fi
+
+			devlink_trap_action_set $trap_name "drop"
+			action=$(devlink_trap_action_get $trap_name)
+			if [ $action != $orig_action ]; then
+				check_err 1 "Trap $trap_name changed action when should not"
+			fi
+		fi
+	done
+
+	log_test "Trap action"
+}
+
+trap_metadata_test()
+{
+	local trap_name
+
+	RET=0
+
+	for trap_name in $(devlink_traps_get); do
+		devlink_trap_metadata_test $trap_name "input_port"
+		check_err $? "Input port not reported as metadata of trap $trap_name"
+	done
+
+	log_test "Trap metadata"
+}
+
+bad_trap_test()
+{
+	RET=0
+
+	devlink_trap_action_set "made_up_trap" "drop"
+	check_fail $? "Did not get an error for non-existing trap"
+
+	log_test "Non-existing trap"
+}
+
+bad_trap_action_test()
+{
+	local traps_arr
+	local trap_name
+
+	RET=0
+
+	# Pick first trap.
+	traps_arr=($(devlink_traps_get))
+	trap_name=${traps_arr[0]}
+
+	devlink_trap_action_set $trap_name "made_up_action"
+	check_fail $? "Did not get an error for non-existing trap action"
+
+	log_test "Non-existing trap action"
+}
+
+trap_stats_test()
+{
+	local trap_name
+
+	RET=0
+
+	for trap_name in $(devlink_traps_get); do
+		devlink_trap_stats_idle_test $trap_name
+		check_err $? "Stats of trap $trap_name not idle when netdev down"
+
+		ip link set dev $NETDEV up
+
+		if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then
+			devlink_trap_action_set $trap_name "trap"
+			devlink_trap_stats_idle_test $trap_name
+			check_fail $? "Stats of trap $trap_name idle when action is trap"
+
+			devlink_trap_action_set $trap_name "drop"
+			devlink_trap_stats_idle_test $trap_name
+			check_err $? "Stats of trap $trap_name not idle when action is drop"
+		else
+			devlink_trap_stats_idle_test $trap_name
+			check_fail $? "Stats of non-drop trap $trap_name idle when should not"
+		fi
+
+		ip link set dev $NETDEV down
+	done
+
+	log_test "Trap statistics"
+}
+
+trap_group_action_test()
+{
+	local curr_group group_name
+	local trap_name
+	local trap_type
+	local action
+
+	RET=0
+
+	for group_name in $(devlink_trap_groups_get); do
+		devlink_trap_group_action_set $group_name "trap"
+
+		for trap_name in $(devlink_traps_get); do
+			curr_group=$(devlink_trap_group_get $trap_name)
+			if [ $curr_group != $group_name ]; then
+				continue
+			fi
+
+			trap_type=$(devlink_trap_type_get $trap_name)
+			if [ $trap_type != "drop" ]; then
+				continue
+			fi
+
+			action=$(devlink_trap_action_get $trap_name)
+			if [ $action != "trap" ]; then
+				check_err 1 "Trap $trap_name did not change action to trap"
+			fi
+		done
+
+		devlink_trap_group_action_set $group_name "drop"
+
+		for trap_name in $(devlink_traps_get); do
+			curr_group=$(devlink_trap_group_get $trap_name)
+			if [ $curr_group != $group_name ]; then
+				continue
+			fi
+
+			trap_type=$(devlink_trap_type_get $trap_name)
+			if [ $trap_type != "drop" ]; then
+				continue
+			fi
+
+			action=$(devlink_trap_action_get $trap_name)
+			if [ $action != "drop" ]; then
+				check_err 1 "Trap $trap_name did not change action to drop"
+			fi
+		done
+	done
+
+	log_test "Trap group action"
+}
+
+bad_trap_group_test()
+{
+	RET=0
+
+	devlink_trap_group_action_set "made_up_trap_group" "drop"
+	check_fail $? "Did not get an error for non-existing trap group"
+
+	log_test "Non-existing trap group"
+}
+
+trap_group_stats_test()
+{
+	local group_name
+
+	RET=0
+
+	for group_name in $(devlink_trap_groups_get); do
+		devlink_trap_group_stats_idle_test $group_name
+		check_err $? "Stats of trap group $group_name not idle when netdev down"
+
+		ip link set dev $NETDEV up
+
+		devlink_trap_group_action_set $group_name "trap"
+		devlink_trap_group_stats_idle_test $group_name
+		check_fail $? "Stats of trap group $group_name idle when action is trap"
+
+		devlink_trap_group_action_set $group_name "drop"
+		ip link set dev $NETDEV down
+	done
+
+	log_test "Trap group statistics"
+}
+
+port_del_test()
+{
+	local group_name
+	local i
+
+	# The test never fails. It is meant to exercise different code paths
+	# and make sure we properly dismantle a port while packets are
+	# in-flight.
+	RET=0
+
+	devlink_traps_enable_all
+
+	for i in $(seq 1 10); do
+		ip link set dev $NETDEV up
+
+		sleep $SLEEP_TIME
+
+		netdevsim_port_destroy
+		netdevsim_port_create
+		udevadm settle
+	done
+
+	devlink_traps_disable_all
+
+	log_test "Port delete"
+}
+
+dev_del_test()
+{
+	local group_name
+	local i
+
+	# The test never fails. It is meant to exercise different code paths
+	# and make sure we properly unregister traps while packets are
+	# in-flight.
+	RET=0
+
+	devlink_traps_enable_all
+
+	for i in $(seq 1 10); do
+		ip link set dev $NETDEV up
+
+		sleep $SLEEP_TIME
+
+		cleanup
+		setup_prepare
+	done
+
+	devlink_traps_disable_all
+
+	log_test "Device delete"
+}
+
+netdevsim_dev_create()
+{
+	echo "$DEV_ADDR 0" > ${NETDEVSIM_PATH}/new_device
+}
+
+netdevsim_dev_destroy()
+{
+	echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
+}
+
+netdevsim_port_create()
+{
+	echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/new_port
+}
+
+netdevsim_port_destroy()
+{
+	echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/del_port
+}
+
+setup_prepare()
+{
+	local netdev
+
+	netdevsim_dev_create
+
+	if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}" ]; then
+		echo "Failed to create netdevsim device"
+		exit 1
+	fi
+
+	netdevsim_port_create
+
+	if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}/net/" ]; then
+		echo "Failed to create netdevsim port"
+		exit 1
+	fi
+
+	# Wait for udev to rename newly created netdev.
+	udevadm settle
+
+	NETDEV=$(ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
+}
+
+cleanup()
+{
+	pre_cleanup
+	netdevsim_port_destroy
+	netdevsim_dev_destroy
+}
+
+trap cleanup EXIT
+
+setup_prepare
+
+tests_run
+
+exit $EXIT_STATUS
diff --git a/tools/testing/selftests/net/forwarding/devlink_lib.sh b/tools/testing/selftests/net/forwarding/devlink_lib.sh
index 8553a67a2322..13d03a6d85ba 100644
--- a/tools/testing/selftests/net/forwarding/devlink_lib.sh
+++ b/tools/testing/selftests/net/forwarding/devlink_lib.sh
@@ -4,19 +4,21 @@
 ##############################################################################
 # Defines
 
-DEVLINK_DEV=$(devlink port show "${NETIFS[p1]}" -j \
-		     | jq -r '.port | keys[]' | cut -d/ -f-2)
-if [ -z "$DEVLINK_DEV" ]; then
-	echo "SKIP: ${NETIFS[p1]} has no devlink device registered for it"
-	exit 1
-fi
-if [[ "$(echo $DEVLINK_DEV | grep -c pci)" -eq 0 ]]; then
-	echo "SKIP: devlink device's bus is not PCI"
-	exit 1
-fi
+if [[ ! -v DEVLINK_DEV ]]; then
+	DEVLINK_DEV=$(devlink port show "${NETIFS[p1]}" -j \
+			     | jq -r '.port | keys[]' | cut -d/ -f-2)
+	if [ -z "$DEVLINK_DEV" ]; then
+		echo "SKIP: ${NETIFS[p1]} has no devlink device registered for it"
+		exit 1
+	fi
+	if [[ "$(echo $DEVLINK_DEV | grep -c pci)" -eq 0 ]]; then
+		echo "SKIP: devlink device's bus is not PCI"
+		exit 1
+	fi
 
-DEVLINK_VIDDID=$(lspci -s $(echo $DEVLINK_DEV | cut -d"/" -f2) \
-		 -n | cut -d" " -f3)
+	DEVLINK_VIDDID=$(lspci -s $(echo $DEVLINK_DEV | cut -d"/" -f2) \
+			 -n | cut -d" " -f3)
+fi
 
 ##############################################################################
 # Sanity checks
@@ -27,6 +29,12 @@ if [ $? -ne 0 ]; then
 	exit 1
 fi
 
+devlink help 2>&1 | grep trap &> /dev/null
+if [ $? -ne 0 ]; then
+	echo "SKIP: iproute2 too old, missing devlink trap support"
+	exit 1
+fi
+
 ##############################################################################
 # Devlink helpers
 
@@ -190,3 +198,160 @@ devlink_tc_bind_pool_th_restore()
 	devlink sb tc bind set $port tc $tc type $dir \
 		pool ${orig[0]} th ${orig[1]}
 }
+
+devlink_traps_num_get()
+{
+	devlink -j trap | jq '.[]["'$DEVLINK_DEV'"] | length'
+}
+
+devlink_traps_get()
+{
+	devlink -j trap | jq -r '.[]["'$DEVLINK_DEV'"][].name'
+}
+
+devlink_trap_type_get()
+{
+	local trap_name=$1; shift
+
+	devlink -j trap show $DEVLINK_DEV trap $trap_name \
+		| jq -r '.[][][].type'
+}
+
+devlink_trap_action_set()
+{
+	local trap_name=$1; shift
+	local action=$1; shift
+
+	# Pipe output to /dev/null to avoid expected warnings.
+	devlink trap set $DEVLINK_DEV trap $trap_name \
+		action $action &> /dev/null
+}
+
+devlink_trap_action_get()
+{
+	local trap_name=$1; shift
+
+	devlink -j trap show $DEVLINK_DEV trap $trap_name \
+		| jq -r '.[][][].action'
+}
+
+devlink_trap_group_get()
+{
+	devlink -j trap show $DEVLINK_DEV trap $trap_name \
+		| jq -r '.[][][].group'
+}
+
+devlink_trap_metadata_test()
+{
+	local trap_name=$1; shift
+	local metadata=$1; shift
+
+	devlink -jv trap show $DEVLINK_DEV trap $trap_name \
+		| jq -e '.[][][].metadata | contains(["'$metadata'"])' \
+		&> /dev/null
+}
+
+devlink_trap_rx_packets_get()
+{
+	local trap_name=$1; shift
+
+	devlink -js trap show $DEVLINK_DEV trap $trap_name \
+		| jq '.[][][]["stats"]["rx"]["packets"]'
+}
+
+devlink_trap_rx_bytes_get()
+{
+	local trap_name=$1; shift
+
+	devlink -js trap show $DEVLINK_DEV trap $trap_name \
+		| jq '.[][][]["stats"]["rx"]["bytes"]'
+}
+
+devlink_trap_stats_idle_test()
+{
+	local trap_name=$1; shift
+	local t0_packets t0_bytes
+	local t1_packets t1_bytes
+
+	t0_packets=$(devlink_trap_rx_packets_get $trap_name)
+	t0_bytes=$(devlink_trap_rx_bytes_get $trap_name)
+
+	sleep 1
+
+	t1_packets=$(devlink_trap_rx_packets_get $trap_name)
+	t1_bytes=$(devlink_trap_rx_bytes_get $trap_name)
+
+	if [[ $t0_packets -eq $t1_packets && $t0_bytes -eq $t1_bytes ]]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+devlink_traps_enable_all()
+{
+	local trap_name
+
+	for trap_name in $(devlink_traps_get); do
+		devlink_trap_action_set $trap_name "trap"
+	done
+}
+
+devlink_traps_disable_all()
+{
+	for trap_name in $(devlink_traps_get); do
+		devlink_trap_action_set $trap_name "drop"
+	done
+}
+
+devlink_trap_groups_get()
+{
+	devlink -j trap group | jq -r '.[]["'$DEVLINK_DEV'"][].name'
+}
+
+devlink_trap_group_action_set()
+{
+	local group_name=$1; shift
+	local action=$1; shift
+
+	# Pipe output to /dev/null to avoid expected warnings.
+	devlink trap group set $DEVLINK_DEV group $group_name action $action \
+		&> /dev/null
+}
+
+devlink_trap_group_rx_packets_get()
+{
+	local group_name=$1; shift
+
+	devlink -js trap group show $DEVLINK_DEV group $group_name \
+		| jq '.[][][]["stats"]["rx"]["packets"]'
+}
+
+devlink_trap_group_rx_bytes_get()
+{
+	local group_name=$1; shift
+
+	devlink -js trap group show $DEVLINK_DEV group $group_name \
+		| jq '.[][][]["stats"]["rx"]["bytes"]'
+}
+
+devlink_trap_group_stats_idle_test()
+{
+	local group_name=$1; shift
+	local t0_packets t0_bytes
+	local t1_packets t1_bytes
+
+	t0_packets=$(devlink_trap_group_rx_packets_get $group_name)
+	t0_bytes=$(devlink_trap_group_rx_bytes_get $group_name)
+
+	sleep 1
+
+	t1_packets=$(devlink_trap_group_rx_packets_get $group_name)
+	t1_bytes=$(devlink_trap_group_rx_bytes_get $group_name)
+
+	if [[ $t0_packets -eq $t1_packets && $t0_bytes -eq $t1_bytes ]]; then
+		return 0
+	else
+		return 1
+	fi
+}