mirror of https://github.com/torvalds/linux.git
64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Provide diagnose information via misc device /dev/diag.
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*
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* Copyright IBM Corp. 2024
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*/
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/ioctl.h>
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#include <linux/kernel.h>
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#include <linux/miscdevice.h>
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#include <linux/types.h>
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#include <uapi/asm/diag.h>
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#include "diag_ioctl.h"
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static long diag_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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long rc;
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switch (cmd) {
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case DIAG324_GET_PIBLEN:
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rc = diag324_piblen(arg);
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break;
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case DIAG324_GET_PIBBUF:
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rc = diag324_pibbuf(arg);
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break;
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case DIAG310_GET_STRIDE:
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rc = diag310_memtop_stride(arg);
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break;
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case DIAG310_GET_MEMTOPLEN:
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rc = diag310_memtop_len(arg);
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break;
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case DIAG310_GET_MEMTOPBUF:
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rc = diag310_memtop_buf(arg);
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break;
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default:
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rc = -ENOIOCTLCMD;
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break;
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}
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return rc;
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}
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static const struct file_operations fops = {
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.owner = THIS_MODULE,
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.open = nonseekable_open,
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.unlocked_ioctl = diag_ioctl,
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};
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static struct miscdevice diagdev = {
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.name = "diag",
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.minor = MISC_DYNAMIC_MINOR,
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.fops = &fops,
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.mode = 0444,
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};
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static int diag_init(void)
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{
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return misc_register(&diagdev);
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}
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device_initcall(diag_init);
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