Merge tag 'net-next-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core:

   - Allow live renaming when an interface is up

   - Add retpoline wrappers for tc, improving considerably the
     performances of complex queue discipline configurations

   - Add inet drop monitor support

   - A few GRO performance improvements

   - Add infrastructure for atomic dev stats, addressing long standing
     data races

   - De-duplicate common code between OVS and conntrack offloading
     infrastructure

   - A bunch of UBSAN_BOUNDS/FORTIFY_SOURCE improvements

   - Netfilter: introduce packet parser for tunneled packets

   - Replace IPVS timer-based estimators with kthreads to scale up the
     workload with the number of available CPUs

   - Add the helper support for connection-tracking OVS offload

  BPF:

   - Support for user defined BPF objects: the use case is to allocate
     own objects, build own object hierarchies and use the building
     blocks to build own data structures flexibly, for example, linked
     lists in BPF

   - Make cgroup local storage available to non-cgroup attached BPF
     programs

   - Avoid unnecessary deadlock detection and failures wrt BPF task
     storage helpers

   - A relevant bunch of BPF verifier fixes and improvements

   - Veristat tool improvements to support custom filtering, sorting,
     and replay of results

   - Add LLVM disassembler as default library for dumping JITed code

   - Lots of new BPF documentation for various BPF maps

   - Add bpf_rcu_read_{,un}lock() support for sleepable programs

   - Add RCU grace period chaining to BPF to wait for the completion of
     access from both sleepable and non-sleepable BPF programs

   - Add support storing struct task_struct objects as kptrs in maps

   - Improve helper UAPI by explicitly defining BPF_FUNC_xxx integer
     values

   - Add libbpf *_opts API-variants for bpf_*_get_fd_by_id() functions

  Protocols:

   - TCP: implement Protective Load Balancing across switch links

   - TCP: allow dynamically disabling TCP-MD5 static key, reverting back
     to fast[er]-path

   - UDP: Introduce optional per-netns hash lookup table

   - IPv6: simplify and cleanup sockets disposal

   - Netlink: support different type policies for each generic netlink
     operation

   - MPTCP: add MSG_FASTOPEN and FastOpen listener side support

   - MPTCP: add netlink notification support for listener sockets events

   - SCTP: add VRF support, allowing sctp sockets binding to VRF devices

   - Add bridging MAC Authentication Bypass (MAB) support

   - Extensions for Ethernet VPN bridging implementation to better
     support multicast scenarios

   - More work for Wi-Fi 7 support, comprising conversion of all the
     existing drivers to internal TX queue usage

   - IPSec: introduce a new offload type (packet offload) allowing
     complete header processing and crypto offloading

   - IPSec: extended ack support for more descriptive XFRM error
     reporting

   - RXRPC: increase SACK table size and move processing into a
     per-local endpoint kernel thread, reducing considerably the
     required locking

   - IEEE 802154: synchronous send frame and extended filtering support,
     initial support for scanning available 15.4 networks

   - Tun: bump the link speed from 10Mbps to 10Gbps

   - Tun/VirtioNet: implement UDP segmentation offload support

  Driver API:

   - PHY/SFP: improve power level switching between standard level 1 and
     the higher power levels

   - New API for netdev <-> devlink_port linkage

   - PTP: convert existing drivers to new frequency adjustment
     implementation

   - DSA: add support for rx offloading

   - Autoload DSA tagging driver when dynamically changing protocol

   - Add new PCP and APPTRUST attributes to Data Center Bridging

   - Add configuration support for 800Gbps link speed

   - Add devlink port function attribute to enable/disable RoCE and
     migratable

   - Extend devlink-rate to support strict prioriry and weighted fair
     queuing

   - Add devlink support to directly reading from region memory

   - New device tree helper to fetch MAC address from nvmem

   - New big TCP helper to simplify temporary header stripping

  New hardware / drivers:

   - Ethernet:
      - Marvel Octeon CNF95N and CN10KB Ethernet Switches
      - Marvel Prestera AC5X Ethernet Switch
      - WangXun 10 Gigabit NIC
      - Motorcomm yt8521 Gigabit Ethernet
      - Microchip ksz9563 Gigabit Ethernet Switch
      - Microsoft Azure Network Adapter
      - Linux Automation 10Base-T1L adapter

   - PHY:
      - Aquantia AQR112 and AQR412
      - Motorcomm YT8531S

   - PTP:
      - Orolia ART-CARD

   - WiFi:
      - MediaTek Wi-Fi 7 (802.11be) devices
      - RealTek rtw8821cu, rtw8822bu, rtw8822cu and rtw8723du USB
        devices

   - Bluetooth:
      - Broadcom BCM4377/4378/4387 Bluetooth chipsets
      - Realtek RTL8852BE and RTL8723DS
      - Cypress.CYW4373A0 WiFi + Bluetooth combo device

  Drivers:

   - CAN:
      - gs_usb: bus error reporting support
      - kvaser_usb: listen only and bus error reporting support

   - Ethernet NICs:
      - Intel (100G):
         - extend action skbedit to RX queue mapping
         - implement devlink-rate support
         - support direct read from memory
      - nVidia/Mellanox (mlx5):
         - SW steering improvements, increasing rules update rate
         - Support for enhanced events compression
         - extend H/W offload packet manipulation capabilities
         - implement IPSec packet offload mode
      - nVidia/Mellanox (mlx4):
         - better big TCP support
      - Netronome Ethernet NICs (nfp):
         - IPsec offload support
         - add support for multicast filter
      - Broadcom:
         - RSS and PTP support improvements
      - AMD/SolarFlare:
         - netlink extened ack improvements
         - add basic flower matches to offload, and related stats
      - Virtual NICs:
         - ibmvnic: introduce affinity hint support
      - small / embedded:
         - FreeScale fec: add initial XDP support
         - Marvel mv643xx_eth: support MII/GMII/RGMII modes for Kirkwood
         - TI am65-cpsw: add suspend/resume support
         - Mediatek MT7986: add RX wireless wthernet dispatch support
         - Realtek 8169: enable GRO software interrupt coalescing per
           default

   - Ethernet high-speed switches:
      - Microchip (sparx5):
         - add support for Sparx5 TC/flower H/W offload via VCAP
      - Mellanox mlxsw:
         - add 802.1X and MAC Authentication Bypass offload support
         - add ip6gre support

   - Embedded Ethernet switches:
      - Mediatek (mtk_eth_soc):
         - improve PCS implementation, add DSA untag support
         - enable flow offload support
      - Renesas:
         - add rswitch R-Car Gen4 gPTP support
      - Microchip (lan966x):
         - add full XDP support
         - add TC H/W offload via VCAP
         - enable PTP on bridge interfaces
      - Microchip (ksz8):
         - add MTU support for KSZ8 series

   - Qualcomm 802.11ax WiFi (ath11k):
      - support configuring channel dwell time during scan

   - MediaTek WiFi (mt76):
      - enable Wireless Ethernet Dispatch (WED) offload support
      - add ack signal support
      - enable coredump support
      - remain_on_channel support

   - Intel WiFi (iwlwifi):
      - enable Wi-Fi 7 Extremely High Throughput (EHT) PHY capabilities
      - 320 MHz channels support

   - RealTek WiFi (rtw89):
      - new dynamic header firmware format support
      - wake-over-WLAN support"

* tag 'net-next-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2002 commits)
  ipvs: fix type warning in do_div() on 32 bit
  net: lan966x: Remove a useless test in lan966x_ptp_add_trap()
  net: ipa: add IPA v4.7 support
  dt-bindings: net: qcom,ipa: Add SM6350 compatible
  bnxt: Use generic HBH removal helper in tx path
  IPv6/GRO: generic helper to remove temporary HBH/jumbo header in driver
  selftests: forwarding: Add bridge MDB test
  selftests: forwarding: Rename bridge_mdb test
  bridge: mcast: Support replacement of MDB port group entries
  bridge: mcast: Allow user space to specify MDB entry routing protocol
  bridge: mcast: Allow user space to add (*, G) with a source list and filter mode
  bridge: mcast: Add support for (*, G) with a source list and filter mode
  bridge: mcast: Avoid arming group timer when (S, G) corresponds to a source
  bridge: mcast: Add a flag for user installed source entries
  bridge: mcast: Expose __br_multicast_del_group_src()
  bridge: mcast: Expose br_multicast_new_group_src()
  bridge: mcast: Add a centralized error path
  bridge: mcast: Place netlink policy before validation functions
  bridge: mcast: Split (*, G) and (S, G) addition into different functions
  bridge: mcast: Do not derive entry type from its filter mode
  ...

1 files changed, 71 insertions, 76 deletions

diff --git a/drivers/nfc/virtual_ncidev.c b/drivers/nfc/virtual_ncidev.c
index 85c06dbb2c44..bb76c7c7cc82 100644
--- a/drivers/nfc/virtual_ncidev.c
+++ b/drivers/nfc/virtual_ncidev.c
@@ -13,12 +13,6 @@
 #include <linux/wait.h>
 #include <net/nfc/nci_core.h>
 
-enum virtual_ncidev_mode {
-	virtual_ncidev_enabled,
-	virtual_ncidev_disabled,
-	virtual_ncidev_disabling,
-};
-
 #define IOCTL_GET_NCIDEV_IDX    0
 #define VIRTUAL_NFC_PROTOCOLS	(NFC_PROTO_JEWEL_MASK | \
 				 NFC_PROTO_MIFARE_MASK | \
@@ -27,12 +21,12 @@ enum virtual_ncidev_mode {
 				 NFC_PROTO_ISO14443_B_MASK | \
 				 NFC_PROTO_ISO15693_MASK)
 
-static enum virtual_ncidev_mode state;
-static DECLARE_WAIT_QUEUE_HEAD(wq);
-static struct miscdevice miscdev;
-static struct sk_buff *send_buff;
-static struct nci_dev *ndev;
-static DEFINE_MUTEX(nci_mutex);
+struct virtual_nci_dev {
+	struct nci_dev *ndev;
+	struct mutex mtx;
+	struct sk_buff *send_buff;
+	struct wait_queue_head wq;
+};
 
 static int virtual_nci_open(struct nci_dev *ndev)
 {
@@ -41,31 +35,34 @@ static int virtual_nci_open(struct nci_dev *ndev)
 
 static int virtual_nci_close(struct nci_dev *ndev)
 {
-	mutex_lock(&nci_mutex);
-	kfree_skb(send_buff);
-	send_buff = NULL;
-	mutex_unlock(&nci_mutex);
+	struct virtual_nci_dev *vdev = nci_get_drvdata(ndev);
+
+	mutex_lock(&vdev->mtx);
+	kfree_skb(vdev->send_buff);
+	vdev->send_buff = NULL;
+	mutex_unlock(&vdev->mtx);
 
 	return 0;
 }
 
 static int virtual_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
 {
-	mutex_lock(&nci_mutex);
-	if (state != virtual_ncidev_enabled) {
-		mutex_unlock(&nci_mutex);
+	struct virtual_nci_dev *vdev = nci_get_drvdata(ndev);
+
+	mutex_lock(&vdev->mtx);
+	if (vdev->send_buff) {
+		mutex_unlock(&vdev->mtx);
 		kfree_skb(skb);
-		return 0;
+		return -1;
 	}
-
-	if (send_buff) {
-		mutex_unlock(&nci_mutex);
+	vdev->send_buff = skb_copy(skb, GFP_KERNEL);
+	if (!vdev->send_buff) {
+		mutex_unlock(&vdev->mtx);
 		kfree_skb(skb);
 		return -1;
 	}
-	send_buff = skb_copy(skb, GFP_KERNEL);
-	mutex_unlock(&nci_mutex);
-	wake_up_interruptible(&wq);
+	mutex_unlock(&vdev->mtx);
+	wake_up_interruptible(&vdev->wq);
 	consume_skb(skb);
 
 	return 0;
@@ -80,29 +77,30 @@ static const struct nci_ops virtual_nci_ops = {
 static ssize_t virtual_ncidev_read(struct file *file, char __user *buf,
 				   size_t count, loff_t *ppos)
 {
+	struct virtual_nci_dev *vdev = file->private_data;
 	size_t actual_len;
 
-	mutex_lock(&nci_mutex);
-	while (!send_buff) {
-		mutex_unlock(&nci_mutex);
-		if (wait_event_interruptible(wq, send_buff))
+	mutex_lock(&vdev->mtx);
+	while (!vdev->send_buff) {
+		mutex_unlock(&vdev->mtx);
+		if (wait_event_interruptible(vdev->wq, vdev->send_buff))
 			return -EFAULT;
-		mutex_lock(&nci_mutex);
+		mutex_lock(&vdev->mtx);
 	}
 
-	actual_len = min_t(size_t, count, send_buff->len);
+	actual_len = min_t(size_t, count, vdev->send_buff->len);
 
-	if (copy_to_user(buf, send_buff->data, actual_len)) {
-		mutex_unlock(&nci_mutex);
+	if (copy_to_user(buf, vdev->send_buff->data, actual_len)) {
+		mutex_unlock(&vdev->mtx);
 		return -EFAULT;
 	}
 
-	skb_pull(send_buff, actual_len);
-	if (send_buff->len == 0) {
-		consume_skb(send_buff);
-		send_buff = NULL;
+	skb_pull(vdev->send_buff, actual_len);
+	if (vdev->send_buff->len == 0) {
+		consume_skb(vdev->send_buff);
+		vdev->send_buff = NULL;
 	}
-	mutex_unlock(&nci_mutex);
+	mutex_unlock(&vdev->mtx);
 
 	return actual_len;
 }
@@ -111,6 +109,7 @@ static ssize_t virtual_ncidev_write(struct file *file,
 				    const char __user *buf,
 				    size_t count, loff_t *ppos)
 {
+	struct virtual_nci_dev *vdev = file->private_data;
 	struct sk_buff *skb;
 
 	skb = alloc_skb(count, GFP_KERNEL);
@@ -122,63 +121,58 @@ static ssize_t virtual_ncidev_write(struct file *file,
 		return -EFAULT;
 	}
 
-	nci_recv_frame(ndev, skb);
+	nci_recv_frame(vdev->ndev, skb);
 	return count;
 }
 
 static int virtual_ncidev_open(struct inode *inode, struct file *file)
 {
 	int ret = 0;
+	struct virtual_nci_dev *vdev;
 
-	mutex_lock(&nci_mutex);
-	if (state != virtual_ncidev_disabled) {
-		mutex_unlock(&nci_mutex);
-		return -EBUSY;
-	}
-
-	ndev = nci_allocate_device(&virtual_nci_ops, VIRTUAL_NFC_PROTOCOLS,
-				   0, 0);
-	if (!ndev) {
-		mutex_unlock(&nci_mutex);
+	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
+	if (!vdev)
+		return -ENOMEM;
+	vdev->ndev = nci_allocate_device(&virtual_nci_ops,
+		VIRTUAL_NFC_PROTOCOLS, 0, 0);
+	if (!vdev->ndev) {
+		kfree(vdev);
 		return -ENOMEM;
 	}
 
-	ret = nci_register_device(ndev);
+	mutex_init(&vdev->mtx);
+	init_waitqueue_head(&vdev->wq);
+	file->private_data = vdev;
+	nci_set_drvdata(vdev->ndev, vdev);
+
+	ret = nci_register_device(vdev->ndev);
 	if (ret < 0) {
-		nci_free_device(ndev);
-		mutex_unlock(&nci_mutex);
+		nci_free_device(vdev->ndev);
+		mutex_destroy(&vdev->mtx);
+		kfree(vdev);
 		return ret;
 	}
-	state = virtual_ncidev_enabled;
-	mutex_unlock(&nci_mutex);
 
 	return 0;
 }
 
 static int virtual_ncidev_close(struct inode *inode, struct file *file)
 {
-	mutex_lock(&nci_mutex);
-
-	if (state == virtual_ncidev_enabled) {
-		state = virtual_ncidev_disabling;
-		mutex_unlock(&nci_mutex);
+	struct virtual_nci_dev *vdev = file->private_data;
 
-		nci_unregister_device(ndev);
-		nci_free_device(ndev);
-
-		mutex_lock(&nci_mutex);
-	}
-
-	state = virtual_ncidev_disabled;
-	mutex_unlock(&nci_mutex);
+	nci_unregister_device(vdev->ndev);
+	nci_free_device(vdev->ndev);
+	mutex_destroy(&vdev->mtx);
+	kfree(vdev);
 
 	return 0;
 }
 
-static long virtual_ncidev_ioctl(struct file *flip, unsigned int cmd,
+static long virtual_ncidev_ioctl(struct file *file, unsigned int cmd,
 				 unsigned long arg)
 {
-	const struct nfc_dev *nfc_dev = ndev->nfc_dev;
+	struct virtual_nci_dev *vdev = file->private_data;
+	const struct nfc_dev *nfc_dev = vdev->ndev->nfc_dev;
 	void __user *p = (void __user *)arg;
 
 	if (cmd != IOCTL_GET_NCIDEV_IDX)
@@ -199,14 +193,15 @@ static const struct file_operations virtual_ncidev_fops = {
 	.unlocked_ioctl = virtual_ncidev_ioctl
 };
 
+static struct miscdevice miscdev = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name = "virtual_nci",
+	.fops = &virtual_ncidev_fops,
+	.mode = 0600,
+};
+
 static int __init virtual_ncidev_init(void)
 {
-	state = virtual_ncidev_disabled;
-	miscdev.minor = MISC_DYNAMIC_MINOR;
-	miscdev.name = "virtual_nci";
-	miscdev.fops = &virtual_ncidev_fops;
-	miscdev.mode = 0600;
-
 	return misc_register(&miscdev);
 }