Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 929 insertions, 0 deletions

diff --git a/drivers/infiniband/core/roce_gid_mgmt.c b/drivers/infiniband/core/roce_gid_mgmt.c
new file mode 100644
index 000000000..e958c43dd
--- /dev/null
+++ b/drivers/infiniband/core/roce_gid_mgmt.c
@@ -0,0 +1,929 @@
+/*
+ * Copyright (c) 2015, Mellanox Technologies inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "core_priv.h"
+
+#include <linux/in.h>
+#include <linux/in6.h>
+
+/* For in6_dev_get/in6_dev_put */
+#include <net/addrconf.h>
+#include <net/bonding.h>
+
+#include <rdma/ib_cache.h>
+#include <rdma/ib_addr.h>
+
+static struct workqueue_struct *gid_cache_wq;
+
+enum gid_op_type {
+	GID_DEL = 0,
+	GID_ADD
+};
+
+struct update_gid_event_work {
+	struct work_struct work;
+	union ib_gid       gid;
+	struct ib_gid_attr gid_attr;
+	enum gid_op_type gid_op;
+};
+
+#define ROCE_NETDEV_CALLBACK_SZ		3
+struct netdev_event_work_cmd {
+	roce_netdev_callback	cb;
+	roce_netdev_filter	filter;
+	struct net_device	*ndev;
+	struct net_device	*filter_ndev;
+};
+
+struct netdev_event_work {
+	struct work_struct		work;
+	struct netdev_event_work_cmd	cmds[ROCE_NETDEV_CALLBACK_SZ];
+};
+
+static const struct {
+	bool (*is_supported)(const struct ib_device *device, u32 port_num);
+	enum ib_gid_type gid_type;
+} PORT_CAP_TO_GID_TYPE[] = {
+	{rdma_protocol_roce_eth_encap, IB_GID_TYPE_ROCE},
+	{rdma_protocol_roce_udp_encap, IB_GID_TYPE_ROCE_UDP_ENCAP},
+};
+
+#define CAP_TO_GID_TABLE_SIZE	ARRAY_SIZE(PORT_CAP_TO_GID_TYPE)
+
+unsigned long roce_gid_type_mask_support(struct ib_device *ib_dev, u32 port)
+{
+	int i;
+	unsigned int ret_flags = 0;
+
+	if (!rdma_protocol_roce(ib_dev, port))
+		return 1UL << IB_GID_TYPE_IB;
+
+	for (i = 0; i < CAP_TO_GID_TABLE_SIZE; i++)
+		if (PORT_CAP_TO_GID_TYPE[i].is_supported(ib_dev, port))
+			ret_flags |= 1UL << PORT_CAP_TO_GID_TYPE[i].gid_type;
+
+	return ret_flags;
+}
+EXPORT_SYMBOL(roce_gid_type_mask_support);
+
+static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev,
+		       u32 port, union ib_gid *gid,
+		       struct ib_gid_attr *gid_attr)
+{
+	int i;
+	unsigned long gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
+
+	for (i = 0; i < IB_GID_TYPE_SIZE; i++) {
+		if ((1UL << i) & gid_type_mask) {
+			gid_attr->gid_type = i;
+			switch (gid_op) {
+			case GID_ADD:
+				ib_cache_gid_add(ib_dev, port,
+						 gid, gid_attr);
+				break;
+			case GID_DEL:
+				ib_cache_gid_del(ib_dev, port,
+						 gid, gid_attr);
+				break;
+			}
+		}
+	}
+}
+
+enum bonding_slave_state {
+	BONDING_SLAVE_STATE_ACTIVE	= 1UL << 0,
+	BONDING_SLAVE_STATE_INACTIVE	= 1UL << 1,
+	/* No primary slave or the device isn't a slave in bonding */
+	BONDING_SLAVE_STATE_NA		= 1UL << 2,
+};
+
+static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev,
+								   struct net_device *upper)
+{
+	if (upper && netif_is_bond_master(upper)) {
+		struct net_device *pdev =
+			bond_option_active_slave_get_rcu(netdev_priv(upper));
+
+		if (pdev)
+			return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE :
+				BONDING_SLAVE_STATE_INACTIVE;
+	}
+
+	return BONDING_SLAVE_STATE_NA;
+}
+
+#define REQUIRED_BOND_STATES		(BONDING_SLAVE_STATE_ACTIVE |	\
+					 BONDING_SLAVE_STATE_NA)
+static bool
+is_eth_port_of_netdev_filter(struct ib_device *ib_dev, u32 port,
+			     struct net_device *rdma_ndev, void *cookie)
+{
+	struct net_device *real_dev;
+	bool res;
+
+	if (!rdma_ndev)
+		return false;
+
+	rcu_read_lock();
+	real_dev = rdma_vlan_dev_real_dev(cookie);
+	if (!real_dev)
+		real_dev = cookie;
+
+	res = ((rdma_is_upper_dev_rcu(rdma_ndev, cookie) &&
+	       (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) &
+		REQUIRED_BOND_STATES)) ||
+	       real_dev == rdma_ndev);
+
+	rcu_read_unlock();
+	return res;
+}
+
+static bool
+is_eth_port_inactive_slave_filter(struct ib_device *ib_dev, u32 port,
+				  struct net_device *rdma_ndev, void *cookie)
+{
+	struct net_device *master_dev;
+	bool res;
+
+	if (!rdma_ndev)
+		return false;
+
+	rcu_read_lock();
+	master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev);
+	res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) ==
+		BONDING_SLAVE_STATE_INACTIVE;
+	rcu_read_unlock();
+
+	return res;
+}
+
+/**
+ * is_ndev_for_default_gid_filter - Check if a given netdevice
+ * can be considered for default GIDs or not.
+ * @ib_dev:		IB device to check
+ * @port:		Port to consider for adding default GID
+ * @rdma_ndev:		rdma netdevice pointer
+ * @cookie:             Netdevice to consider to form a default GID
+ *
+ * is_ndev_for_default_gid_filter() returns true if a given netdevice can be
+ * considered for deriving default RoCE GID, returns false otherwise.
+ */
+static bool
+is_ndev_for_default_gid_filter(struct ib_device *ib_dev, u32 port,
+			       struct net_device *rdma_ndev, void *cookie)
+{
+	struct net_device *cookie_ndev = cookie;
+	bool res;
+
+	if (!rdma_ndev)
+		return false;
+
+	rcu_read_lock();
+
+	/*
+	 * When rdma netdevice is used in bonding, bonding master netdevice
+	 * should be considered for default GIDs. Therefore, ignore slave rdma
+	 * netdevices when bonding is considered.
+	 * Additionally when event(cookie) netdevice is bond master device,
+	 * make sure that it the upper netdevice of rdma netdevice.
+	 */
+	res = ((cookie_ndev == rdma_ndev && !netif_is_bond_slave(rdma_ndev)) ||
+	       (netif_is_bond_master(cookie_ndev) &&
+		rdma_is_upper_dev_rcu(rdma_ndev, cookie_ndev)));
+
+	rcu_read_unlock();
+	return res;
+}
+
+static bool pass_all_filter(struct ib_device *ib_dev, u32 port,
+			    struct net_device *rdma_ndev, void *cookie)
+{
+	return true;
+}
+
+static bool upper_device_filter(struct ib_device *ib_dev, u32 port,
+				struct net_device *rdma_ndev, void *cookie)
+{
+	bool res;
+
+	if (!rdma_ndev)
+		return false;
+
+	if (rdma_ndev == cookie)
+		return true;
+
+	rcu_read_lock();
+	res = rdma_is_upper_dev_rcu(rdma_ndev, cookie);
+	rcu_read_unlock();
+
+	return res;
+}
+
+/**
+ * is_upper_ndev_bond_master_filter - Check if a given netdevice
+ * is bond master device of netdevice of the RDMA device of port.
+ * @ib_dev:		IB device to check
+ * @port:		Port to consider for adding default GID
+ * @rdma_ndev:		Pointer to rdma netdevice
+ * @cookie:	        Netdevice to consider to form a default GID
+ *
+ * is_upper_ndev_bond_master_filter() returns true if a cookie_netdev
+ * is bond master device and rdma_ndev is its lower netdevice. It might
+ * not have been established as slave device yet.
+ */
+static bool
+is_upper_ndev_bond_master_filter(struct ib_device *ib_dev, u32 port,
+				 struct net_device *rdma_ndev,
+				 void *cookie)
+{
+	struct net_device *cookie_ndev = cookie;
+	bool match = false;
+
+	if (!rdma_ndev)
+		return false;
+
+	rcu_read_lock();
+	if (netif_is_bond_master(cookie_ndev) &&
+	    rdma_is_upper_dev_rcu(rdma_ndev, cookie_ndev))
+		match = true;
+	rcu_read_unlock();
+	return match;
+}
+
+static void update_gid_ip(enum gid_op_type gid_op,
+			  struct ib_device *ib_dev,
+			  u32 port, struct net_device *ndev,
+			  struct sockaddr *addr)
+{
+	union ib_gid gid;
+	struct ib_gid_attr gid_attr;
+
+	rdma_ip2gid(addr, &gid);
+	memset(&gid_attr, 0, sizeof(gid_attr));
+	gid_attr.ndev = ndev;
+
+	update_gid(gid_op, ib_dev, port, &gid, &gid_attr);
+}
+
+static void bond_delete_netdev_default_gids(struct ib_device *ib_dev,
+					    u32 port,
+					    struct net_device *rdma_ndev,
+					    struct net_device *event_ndev)
+{
+	struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev);
+	unsigned long gid_type_mask;
+
+	if (!rdma_ndev)
+		return;
+
+	if (!real_dev)
+		real_dev = event_ndev;
+
+	rcu_read_lock();
+
+	if (((rdma_ndev != event_ndev &&
+	      !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) ||
+	     is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev)
+						 ==
+	     BONDING_SLAVE_STATE_INACTIVE)) {
+		rcu_read_unlock();
+		return;
+	}
+
+	rcu_read_unlock();
+
+	gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
+
+	ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev,
+				     gid_type_mask,
+				     IB_CACHE_GID_DEFAULT_MODE_DELETE);
+}
+
+static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
+				 u32 port, struct net_device *ndev)
+{
+	const struct in_ifaddr *ifa;
+	struct in_device *in_dev;
+	struct sin_list {
+		struct list_head	list;
+		struct sockaddr_in	ip;
+	};
+	struct sin_list *sin_iter;
+	struct sin_list *sin_temp;
+
+	LIST_HEAD(sin_list);
+	if (ndev->reg_state >= NETREG_UNREGISTERING)
+		return;
+
+	rcu_read_lock();
+	in_dev = __in_dev_get_rcu(ndev);
+	if (!in_dev) {
+		rcu_read_unlock();
+		return;
+	}
+
+	in_dev_for_each_ifa_rcu(ifa, in_dev) {
+		struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+
+		if (!entry)
+			continue;
+
+		entry->ip.sin_family = AF_INET;
+		entry->ip.sin_addr.s_addr = ifa->ifa_address;
+		list_add_tail(&entry->list, &sin_list);
+	}
+
+	rcu_read_unlock();
+
+	list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) {
+		update_gid_ip(GID_ADD, ib_dev, port, ndev,
+			      (struct sockaddr *)&sin_iter->ip);
+		list_del(&sin_iter->list);
+		kfree(sin_iter);
+	}
+}
+
+static void enum_netdev_ipv6_ips(struct ib_device *ib_dev,
+				 u32 port, struct net_device *ndev)
+{
+	struct inet6_ifaddr *ifp;
+	struct inet6_dev *in6_dev;
+	struct sin6_list {
+		struct list_head	list;
+		struct sockaddr_in6	sin6;
+	};
+	struct sin6_list *sin6_iter;
+	struct sin6_list *sin6_temp;
+	struct ib_gid_attr gid_attr = {.ndev = ndev};
+	LIST_HEAD(sin6_list);
+
+	if (ndev->reg_state >= NETREG_UNREGISTERING)
+		return;
+
+	in6_dev = in6_dev_get(ndev);
+	if (!in6_dev)
+		return;
+
+	read_lock_bh(&in6_dev->lock);
+	list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
+		struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+
+		if (!entry)
+			continue;
+
+		entry->sin6.sin6_family = AF_INET6;
+		entry->sin6.sin6_addr = ifp->addr;
+		list_add_tail(&entry->list, &sin6_list);
+	}
+	read_unlock_bh(&in6_dev->lock);
+
+	in6_dev_put(in6_dev);
+
+	list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) {
+		union ib_gid	gid;
+
+		rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid);
+		update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr);
+		list_del(&sin6_iter->list);
+		kfree(sin6_iter);
+	}
+}
+
+static void _add_netdev_ips(struct ib_device *ib_dev, u32 port,
+			    struct net_device *ndev)
+{
+	enum_netdev_ipv4_ips(ib_dev, port, ndev);
+	if (IS_ENABLED(CONFIG_IPV6))
+		enum_netdev_ipv6_ips(ib_dev, port, ndev);
+}
+
+static void add_netdev_ips(struct ib_device *ib_dev, u32 port,
+			   struct net_device *rdma_ndev, void *cookie)
+{
+	_add_netdev_ips(ib_dev, port, cookie);
+}
+
+static void del_netdev_ips(struct ib_device *ib_dev, u32 port,
+			   struct net_device *rdma_ndev, void *cookie)
+{
+	ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie);
+}
+
+/**
+ * del_default_gids - Delete default GIDs of the event/cookie netdevice
+ * @ib_dev:	RDMA device pointer
+ * @port:	Port of the RDMA device whose GID table to consider
+ * @rdma_ndev:	Unused rdma netdevice
+ * @cookie:	Pointer to event netdevice
+ *
+ * del_default_gids() deletes the default GIDs of the event/cookie netdevice.
+ */
+static void del_default_gids(struct ib_device *ib_dev, u32 port,
+			     struct net_device *rdma_ndev, void *cookie)
+{
+	struct net_device *cookie_ndev = cookie;
+	unsigned long gid_type_mask;
+
+	gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
+
+	ib_cache_gid_set_default_gid(ib_dev, port, cookie_ndev, gid_type_mask,
+				     IB_CACHE_GID_DEFAULT_MODE_DELETE);
+}
+
+static void add_default_gids(struct ib_device *ib_dev, u32 port,
+			     struct net_device *rdma_ndev, void *cookie)
+{
+	struct net_device *event_ndev = cookie;
+	unsigned long gid_type_mask;
+
+	gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
+	ib_cache_gid_set_default_gid(ib_dev, port, event_ndev, gid_type_mask,
+				     IB_CACHE_GID_DEFAULT_MODE_SET);
+}
+
+static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev,
+				    u32 port,
+				    struct net_device *rdma_ndev,
+				    void *cookie)
+{
+	struct net *net;
+	struct net_device *ndev;
+
+	/* Lock the rtnl to make sure the netdevs does not move under
+	 * our feet
+	 */
+	rtnl_lock();
+	down_read(&net_rwsem);
+	for_each_net(net)
+		for_each_netdev(net, ndev) {
+			/*
+			 * Filter and add default GIDs of the primary netdevice
+			 * when not in bonding mode, or add default GIDs
+			 * of bond master device, when in bonding mode.
+			 */
+			if (is_ndev_for_default_gid_filter(ib_dev, port,
+							   rdma_ndev, ndev))
+				add_default_gids(ib_dev, port, rdma_ndev, ndev);
+
+			if (is_eth_port_of_netdev_filter(ib_dev, port,
+							 rdma_ndev, ndev))
+				_add_netdev_ips(ib_dev, port, ndev);
+		}
+	up_read(&net_rwsem);
+	rtnl_unlock();
+}
+
+/**
+ * rdma_roce_rescan_device - Rescan all of the network devices in the system
+ * and add their gids, as needed, to the relevant RoCE devices.
+ *
+ * @ib_dev:         the rdma device
+ */
+void rdma_roce_rescan_device(struct ib_device *ib_dev)
+{
+	ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL,
+			    enum_all_gids_of_dev_cb, NULL);
+}
+EXPORT_SYMBOL(rdma_roce_rescan_device);
+
+static void callback_for_addr_gid_device_scan(struct ib_device *device,
+					      u32 port,
+					      struct net_device *rdma_ndev,
+					      void *cookie)
+{
+	struct update_gid_event_work *parsed = cookie;
+
+	return update_gid(parsed->gid_op, device,
+			  port, &parsed->gid,
+			  &parsed->gid_attr);
+}
+
+struct upper_list {
+	struct list_head list;
+	struct net_device *upper;
+};
+
+static int netdev_upper_walk(struct net_device *upper,
+			     struct netdev_nested_priv *priv)
+{
+	struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+	struct list_head *upper_list = (struct list_head *)priv->data;
+
+	if (!entry)
+		return 0;
+
+	list_add_tail(&entry->list, upper_list);
+	dev_hold(upper);
+	entry->upper = upper;
+
+	return 0;
+}
+
+static void handle_netdev_upper(struct ib_device *ib_dev, u32 port,
+				void *cookie,
+				void (*handle_netdev)(struct ib_device *ib_dev,
+						      u32 port,
+						      struct net_device *ndev))
+{
+	struct net_device *ndev = cookie;
+	struct netdev_nested_priv priv;
+	struct upper_list *upper_iter;
+	struct upper_list *upper_temp;
+	LIST_HEAD(upper_list);
+
+	priv.data = &upper_list;
+	rcu_read_lock();
+	netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &priv);
+	rcu_read_unlock();
+
+	handle_netdev(ib_dev, port, ndev);
+	list_for_each_entry_safe(upper_iter, upper_temp, &upper_list,
+				 list) {
+		handle_netdev(ib_dev, port, upper_iter->upper);
+		dev_put(upper_iter->upper);
+		list_del(&upper_iter->list);
+		kfree(upper_iter);
+	}
+}
+
+static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u32 port,
+				      struct net_device *event_ndev)
+{
+	ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
+}
+
+static void del_netdev_upper_ips(struct ib_device *ib_dev, u32 port,
+				 struct net_device *rdma_ndev, void *cookie)
+{
+	handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids);
+}
+
+static void add_netdev_upper_ips(struct ib_device *ib_dev, u32 port,
+				 struct net_device *rdma_ndev, void *cookie)
+{
+	handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips);
+}
+
+static void del_netdev_default_ips_join(struct ib_device *ib_dev, u32 port,
+					struct net_device *rdma_ndev,
+					void *cookie)
+{
+	struct net_device *master_ndev;
+
+	rcu_read_lock();
+	master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev);
+	if (master_ndev)
+		dev_hold(master_ndev);
+	rcu_read_unlock();
+
+	if (master_ndev) {
+		bond_delete_netdev_default_gids(ib_dev, port, rdma_ndev,
+						master_ndev);
+		dev_put(master_ndev);
+	}
+}
+
+/* The following functions operate on all IB devices. netdevice_event and
+ * addr_event execute ib_enum_all_roce_netdevs through a work.
+ * ib_enum_all_roce_netdevs iterates through all IB devices.
+ */
+
+static void netdevice_event_work_handler(struct work_struct *_work)
+{
+	struct netdev_event_work *work =
+		container_of(_work, struct netdev_event_work, work);
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) {
+		ib_enum_all_roce_netdevs(work->cmds[i].filter,
+					 work->cmds[i].filter_ndev,
+					 work->cmds[i].cb,
+					 work->cmds[i].ndev);
+		dev_put(work->cmds[i].ndev);
+		dev_put(work->cmds[i].filter_ndev);
+	}
+
+	kfree(work);
+}
+
+static int netdevice_queue_work(struct netdev_event_work_cmd *cmds,
+				struct net_device *ndev)
+{
+	unsigned int i;
+	struct netdev_event_work *ndev_work =
+		kmalloc(sizeof(*ndev_work), GFP_KERNEL);
+
+	if (!ndev_work)
+		return NOTIFY_DONE;
+
+	memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds));
+	for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) {
+		if (!ndev_work->cmds[i].ndev)
+			ndev_work->cmds[i].ndev = ndev;
+		if (!ndev_work->cmds[i].filter_ndev)
+			ndev_work->cmds[i].filter_ndev = ndev;
+		dev_hold(ndev_work->cmds[i].ndev);
+		dev_hold(ndev_work->cmds[i].filter_ndev);
+	}
+	INIT_WORK(&ndev_work->work, netdevice_event_work_handler);
+
+	queue_work(gid_cache_wq, &ndev_work->work);
+
+	return NOTIFY_DONE;
+}
+
+static const struct netdev_event_work_cmd add_cmd = {
+	.cb	= add_netdev_ips,
+	.filter	= is_eth_port_of_netdev_filter
+};
+
+static const struct netdev_event_work_cmd add_cmd_upper_ips = {
+	.cb	= add_netdev_upper_ips,
+	.filter = is_eth_port_of_netdev_filter
+};
+
+static void
+ndev_event_unlink(struct netdev_notifier_changeupper_info *changeupper_info,
+		  struct netdev_event_work_cmd *cmds)
+{
+	static const struct netdev_event_work_cmd
+			upper_ips_del_cmd = {
+				.cb	= del_netdev_upper_ips,
+				.filter	= upper_device_filter
+	};
+
+	cmds[0] = upper_ips_del_cmd;
+	cmds[0].ndev = changeupper_info->upper_dev;
+	cmds[1] = add_cmd;
+}
+
+static const struct netdev_event_work_cmd bonding_default_add_cmd = {
+	.cb	= add_default_gids,
+	.filter	= is_upper_ndev_bond_master_filter
+};
+
+static void
+ndev_event_link(struct net_device *event_ndev,
+		struct netdev_notifier_changeupper_info *changeupper_info,
+		struct netdev_event_work_cmd *cmds)
+{
+	static const struct netdev_event_work_cmd
+			bonding_default_del_cmd = {
+				.cb	= del_default_gids,
+				.filter	= is_upper_ndev_bond_master_filter
+			};
+	/*
+	 * When a lower netdev is linked to its upper bonding
+	 * netdev, delete lower slave netdev's default GIDs.
+	 */
+	cmds[0] = bonding_default_del_cmd;
+	cmds[0].ndev = event_ndev;
+	cmds[0].filter_ndev = changeupper_info->upper_dev;
+
+	/* Now add bonding upper device default GIDs */
+	cmds[1] = bonding_default_add_cmd;
+	cmds[1].ndev = changeupper_info->upper_dev;
+	cmds[1].filter_ndev = changeupper_info->upper_dev;
+
+	/* Now add bonding upper device IP based GIDs */
+	cmds[2] = add_cmd_upper_ips;
+	cmds[2].ndev = changeupper_info->upper_dev;
+	cmds[2].filter_ndev = changeupper_info->upper_dev;
+}
+
+static void netdevice_event_changeupper(struct net_device *event_ndev,
+		struct netdev_notifier_changeupper_info *changeupper_info,
+		struct netdev_event_work_cmd *cmds)
+{
+	if (changeupper_info->linking)
+		ndev_event_link(event_ndev, changeupper_info, cmds);
+	else
+		ndev_event_unlink(changeupper_info, cmds);
+}
+
+static const struct netdev_event_work_cmd add_default_gid_cmd = {
+	.cb	= add_default_gids,
+	.filter	= is_ndev_for_default_gid_filter,
+};
+
+static int netdevice_event(struct notifier_block *this, unsigned long event,
+			   void *ptr)
+{
+	static const struct netdev_event_work_cmd del_cmd = {
+		.cb = del_netdev_ips, .filter = pass_all_filter};
+	static const struct netdev_event_work_cmd
+			bonding_default_del_cmd_join = {
+				.cb	= del_netdev_default_ips_join,
+				.filter	= is_eth_port_inactive_slave_filter
+			};
+	static const struct netdev_event_work_cmd
+			netdev_del_cmd = {
+				.cb	= del_netdev_ips,
+				.filter = is_eth_port_of_netdev_filter
+			};
+	static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = {
+		.cb = del_netdev_upper_ips, .filter = upper_device_filter};
+	struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
+	struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} };
+
+	if (ndev->type != ARPHRD_ETHER)
+		return NOTIFY_DONE;
+
+	switch (event) {
+	case NETDEV_REGISTER:
+	case NETDEV_UP:
+		cmds[0] = bonding_default_del_cmd_join;
+		cmds[1] = add_default_gid_cmd;
+		cmds[2] = add_cmd;
+		break;
+
+	case NETDEV_UNREGISTER:
+		if (ndev->reg_state < NETREG_UNREGISTERED)
+			cmds[0] = del_cmd;
+		else
+			return NOTIFY_DONE;
+		break;
+
+	case NETDEV_CHANGEADDR:
+		cmds[0] = netdev_del_cmd;
+		if (ndev->reg_state == NETREG_REGISTERED) {
+			cmds[1] = add_default_gid_cmd;
+			cmds[2] = add_cmd;
+		}
+		break;
+
+	case NETDEV_CHANGEUPPER:
+		netdevice_event_changeupper(ndev,
+			container_of(ptr, struct netdev_notifier_changeupper_info, info),
+			cmds);
+		break;
+
+	case NETDEV_BONDING_FAILOVER:
+		cmds[0] = bonding_event_ips_del_cmd;
+		/* Add default GIDs of the bond device */
+		cmds[1] = bonding_default_add_cmd;
+		/* Add IP based GIDs of the bond device */
+		cmds[2] = add_cmd_upper_ips;
+		break;
+
+	default:
+		return NOTIFY_DONE;
+	}
+
+	return netdevice_queue_work(cmds, ndev);
+}
+
+static void update_gid_event_work_handler(struct work_struct *_work)
+{
+	struct update_gid_event_work *work =
+		container_of(_work, struct update_gid_event_work, work);
+
+	ib_enum_all_roce_netdevs(is_eth_port_of_netdev_filter,
+				 work->gid_attr.ndev,
+				 callback_for_addr_gid_device_scan, work);
+
+	dev_put(work->gid_attr.ndev);
+	kfree(work);
+}
+
+static int addr_event(struct notifier_block *this, unsigned long event,
+		      struct sockaddr *sa, struct net_device *ndev)
+{
+	struct update_gid_event_work *work;
+	enum gid_op_type gid_op;
+
+	if (ndev->type != ARPHRD_ETHER)
+		return NOTIFY_DONE;
+
+	switch (event) {
+	case NETDEV_UP:
+		gid_op = GID_ADD;
+		break;
+
+	case NETDEV_DOWN:
+		gid_op = GID_DEL;
+		break;
+
+	default:
+		return NOTIFY_DONE;
+	}
+
+	work = kmalloc(sizeof(*work), GFP_ATOMIC);
+	if (!work)
+		return NOTIFY_DONE;
+
+	INIT_WORK(&work->work, update_gid_event_work_handler);
+
+	rdma_ip2gid(sa, &work->gid);
+	work->gid_op = gid_op;
+
+	memset(&work->gid_attr, 0, sizeof(work->gid_attr));
+	dev_hold(ndev);
+	work->gid_attr.ndev   = ndev;
+
+	queue_work(gid_cache_wq, &work->work);
+
+	return NOTIFY_DONE;
+}
+
+static int inetaddr_event(struct notifier_block *this, unsigned long event,
+			  void *ptr)
+{
+	struct sockaddr_in	in;
+	struct net_device	*ndev;
+	struct in_ifaddr	*ifa = ptr;
+
+	in.sin_family = AF_INET;
+	in.sin_addr.s_addr = ifa->ifa_address;
+	ndev = ifa->ifa_dev->dev;
+
+	return addr_event(this, event, (struct sockaddr *)&in, ndev);
+}
+
+static int inet6addr_event(struct notifier_block *this, unsigned long event,
+			   void *ptr)
+{
+	struct sockaddr_in6	in6;
+	struct net_device	*ndev;
+	struct inet6_ifaddr	*ifa6 = ptr;
+
+	in6.sin6_family = AF_INET6;
+	in6.sin6_addr = ifa6->addr;
+	ndev = ifa6->idev->dev;
+
+	return addr_event(this, event, (struct sockaddr *)&in6, ndev);
+}
+
+static struct notifier_block nb_netdevice = {
+	.notifier_call = netdevice_event
+};
+
+static struct notifier_block nb_inetaddr = {
+	.notifier_call = inetaddr_event
+};
+
+static struct notifier_block nb_inet6addr = {
+	.notifier_call = inet6addr_event
+};
+
+int __init roce_gid_mgmt_init(void)
+{
+	gid_cache_wq = alloc_ordered_workqueue("gid-cache-wq", 0);
+	if (!gid_cache_wq)
+		return -ENOMEM;
+
+	register_inetaddr_notifier(&nb_inetaddr);
+	if (IS_ENABLED(CONFIG_IPV6))
+		register_inet6addr_notifier(&nb_inet6addr);
+	/* We relay on the netdevice notifier to enumerate all
+	 * existing devices in the system. Register to this notifier
+	 * last to make sure we will not miss any IP add/del
+	 * callbacks.
+	 */
+	register_netdevice_notifier(&nb_netdevice);
+
+	return 0;
+}
+
+void __exit roce_gid_mgmt_cleanup(void)
+{
+	if (IS_ENABLED(CONFIG_IPV6))
+		unregister_inet6addr_notifier(&nb_inet6addr);
+	unregister_inetaddr_notifier(&nb_inetaddr);
+	unregister_netdevice_notifier(&nb_netdevice);
+	/* Ensure all gid deletion tasks complete before we go down,
+	 * to avoid any reference to free'd memory. By the time
+	 * ib-core is removed, all physical devices have been removed,
+	 * so no issue with remaining hardware contexts.
+	 */
+	destroy_workqueue(gid_cache_wq);
+}