From 34ff636f322c6d5e4f0a52338fa63a7dff09a495 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Sat, 18 Jul 2026 13:15:36 -0400 Subject: scftorture: Count single_rpc offline failures in statistics output scf_torture_stats_print() aggregates each invoker thread's counters into a local scf_statistics structure before printing, but the n_single_rpc_ofl field is missing from the aggregation loop. As a result, the "single_rpc_ofl" value printed in the statistics line is always zero, even when smp_call_function_single() invocations for the RPC test have failed due to offline CPUs and been counted by the invoker threads. Add the missing accumulation so that the printed value reflects the actual counts. Signed-off-by: Joel Fernandes Signed-off-by: Paul E. McKenney --- drivers/nfc/virtual_ncidev.c | 212 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 212 insertions(+) create mode 100644 drivers/nfc/virtual_ncidev.c (limited to 'drivers/nfc/virtual_ncidev.c') diff --git a/drivers/nfc/virtual_ncidev.c b/drivers/nfc/virtual_ncidev.c new file mode 100644 index 000000000..8eeb447ac --- /dev/null +++ b/drivers/nfc/virtual_ncidev.c @@ -0,0 +1,212 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Virtual NCI device simulation driver + * + * Copyright (C) 2020 Samsung Electronics + * Bongsu Jeon + */ + +#include +#include +#include +#include +#include +#include + +#define IOCTL_GET_NCIDEV_IDX 0 +#define VIRTUAL_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ + NFC_PROTO_MIFARE_MASK | \ + NFC_PROTO_FELICA_MASK | \ + NFC_PROTO_ISO14443_MASK | \ + NFC_PROTO_ISO14443_B_MASK | \ + NFC_PROTO_ISO15693_MASK) + +struct virtual_nci_dev { + struct nci_dev *ndev; + struct mutex mtx; + struct sk_buff *send_buff; + struct wait_queue_head wq; + bool running; +}; + +static int virtual_nci_open(struct nci_dev *ndev) +{ + struct virtual_nci_dev *vdev = nci_get_drvdata(ndev); + + vdev->running = true; + return 0; +} + +static int virtual_nci_close(struct nci_dev *ndev) +{ + struct virtual_nci_dev *vdev = nci_get_drvdata(ndev); + + mutex_lock(&vdev->mtx); + kfree_skb(vdev->send_buff); + vdev->send_buff = NULL; + vdev->running = false; + mutex_unlock(&vdev->mtx); + + return 0; +} + +static int virtual_nci_send(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct virtual_nci_dev *vdev = nci_get_drvdata(ndev); + + mutex_lock(&vdev->mtx); + if (vdev->send_buff || !vdev->running) { + mutex_unlock(&vdev->mtx); + kfree_skb(skb); + return -1; + } + vdev->send_buff = skb_copy(skb, GFP_KERNEL); + if (!vdev->send_buff) { + mutex_unlock(&vdev->mtx); + kfree_skb(skb); + return -1; + } + mutex_unlock(&vdev->mtx); + wake_up_interruptible(&vdev->wq); + consume_skb(skb); + + return 0; +} + +static const struct nci_ops virtual_nci_ops = { + .open = virtual_nci_open, + .close = virtual_nci_close, + .send = virtual_nci_send +}; + +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(&vdev->mtx); + while (!vdev->send_buff) { + mutex_unlock(&vdev->mtx); + if (wait_event_interruptible(vdev->wq, vdev->send_buff)) + return -EFAULT; + mutex_lock(&vdev->mtx); + } + + actual_len = min_t(size_t, count, vdev->send_buff->len); + + if (copy_to_user(buf, vdev->send_buff->data, actual_len)) { + mutex_unlock(&vdev->mtx); + return -EFAULT; + } + + skb_pull(vdev->send_buff, actual_len); + if (vdev->send_buff->len == 0) { + consume_skb(vdev->send_buff); + vdev->send_buff = NULL; + } + mutex_unlock(&vdev->mtx); + + return actual_len; +} + +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); + if (!skb) + return -ENOMEM; + + if (copy_from_user(skb_put(skb, count), buf, count)) { + kfree_skb(skb); + return -EFAULT; + } + + 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; + + vdev = kzalloc_obj(*vdev); + if (!vdev) + return -ENOMEM; + vdev->ndev = nci_allocate_device(&virtual_nci_ops, + VIRTUAL_NFC_PROTOCOLS, 0, 0); + if (!vdev->ndev) { + kfree(vdev); + return -ENOMEM; + } + + 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(vdev->ndev); + mutex_destroy(&vdev->mtx); + kfree(vdev); + return ret; + } + + return 0; +} + +static int virtual_ncidev_close(struct inode *inode, struct file *file) +{ + struct virtual_nci_dev *vdev = file->private_data; + + 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 *file, unsigned int cmd, + unsigned long arg) +{ + 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) + return -ENOTTY; + + if (copy_to_user(p, &nfc_dev->idx, sizeof(nfc_dev->idx))) + return -EFAULT; + + return 0; +} + +static const struct file_operations virtual_ncidev_fops = { + .owner = THIS_MODULE, + .read = virtual_ncidev_read, + .write = virtual_ncidev_write, + .open = virtual_ncidev_open, + .release = virtual_ncidev_close, + .unlocked_ioctl = virtual_ncidev_ioctl +}; + +static struct miscdevice miscdev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "virtual_nci", + .fops = &virtual_ncidev_fops, + .mode = 0600, +}; + +module_misc_device(miscdev); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Virtual NCI device simulation driver"); +MODULE_AUTHOR("Bongsu Jeon "); -- cgit v1.3.1