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Diffstat (limited to 'drivers/staging/dgrp/dgrp_mon_ops.c')
-rw-r--r--drivers/staging/dgrp/dgrp_mon_ops.c327
1 files changed, 0 insertions, 327 deletions
diff --git a/drivers/staging/dgrp/dgrp_mon_ops.c b/drivers/staging/dgrp/dgrp_mon_ops.c
deleted file mode 100644
index d18be4180e3b..000000000000
--- a/drivers/staging/dgrp/dgrp_mon_ops.c
+++ /dev/null
@@ -1,327 +0,0 @@
-/*****************************************************************************
- *
- * Copyright 1999 Digi International (www.digi.com)
- * James Puzzo <jamesp at digi dot com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- */
-
-/*
- *
- * Filename:
- *
- * dgrp_mon_ops.c
- *
- * Description:
- *
- * Handle the file operations required for the "monitor" devices.
- * Includes those functions required to register the "mon" devices
- * in "/proc".
- *
- * Author:
- *
- * James A. Puzzo
- *
- */
-
-#include <linux/module.h>
-#include <linux/tty.h>
-#include <linux/sched.h>
-#include <asm/unaligned.h>
-#include <linux/slab.h>
-#include <linux/proc_fs.h>
-#include <linux/uaccess.h>
-
-#include "dgrp_common.h"
-
-/* File operation declarations */
-static int dgrp_mon_open(struct inode *, struct file *);
-static int dgrp_mon_release(struct inode *, struct file *);
-static ssize_t dgrp_mon_read(struct file *, char __user *, size_t, loff_t *);
-static long dgrp_mon_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg);
-
-const struct file_operations dgrp_mon_ops = {
- .owner = THIS_MODULE,
- .read = dgrp_mon_read,
- .unlocked_ioctl = dgrp_mon_ioctl,
- .open = dgrp_mon_open,
- .release = dgrp_mon_release,
-};
-
-/**
- * dgrp_mon_open() -- open /proc/dgrp/ports device for a PortServer
- * @inode: struct inode *
- * @file: struct file *
- *
- * Open function to open the /proc/dgrp/ports device for a PortServer.
- */
-static int dgrp_mon_open(struct inode *inode, struct file *file)
-{
- struct nd_struct *nd;
- struct timeval tv;
- uint32_t time;
- u8 *buf;
- int rtn;
-
- rtn = try_module_get(THIS_MODULE);
- if (!rtn)
- return -ENXIO;
-
- rtn = 0;
-
- if (!capable(CAP_SYS_ADMIN)) {
- rtn = -EPERM;
- goto done;
- }
-
- /*
- * Make sure that the "private_data" field hasn't already been used.
- */
- if (file->private_data) {
- rtn = -EINVAL;
- goto done;
- }
-
- /*
- * Get the node pointer, and fail if it doesn't exist.
- */
- nd = PDE_DATA(inode);
- if (!nd) {
- rtn = -ENXIO;
- goto done;
- }
-
- file->private_data = (void *) nd;
-
- /*
- * Allocate the monitor buffer.
- */
-
- /*
- * Grab the MON lock.
- */
- down(&nd->nd_mon_semaphore);
-
- if (nd->nd_mon_buf) {
- rtn = -EBUSY;
- goto done_up;
- }
-
- nd->nd_mon_buf = kmalloc(MON_MAX, GFP_KERNEL);
-
- if (!nd->nd_mon_buf) {
- rtn = -ENOMEM;
- goto done_up;
- }
-
- /*
- * Enter an RPDUMP file header into the buffer.
- */
-
- buf = nd->nd_mon_buf;
-
- strcpy(buf, RPDUMP_MAGIC);
- buf += strlen(buf) + 1;
-
- do_gettimeofday(&tv);
-
- /*
- * tv.tv_sec might be a 64 bit quantity. Pare
- * it down to 32 bits before attempting to encode
- * it.
- */
- time = (uint32_t) (tv.tv_sec & 0xffffffff);
-
- put_unaligned_be32(time, buf);
- put_unaligned_be16(0, buf + 4);
- buf += 6;
-
- if (nd->nd_tx_module) {
- buf[0] = RPDUMP_CLIENT;
- put_unaligned_be32(0, buf + 1);
- put_unaligned_be16(1, buf + 5);
- buf[7] = 0xf0 + nd->nd_tx_module;
- buf += 8;
- }
-
- if (nd->nd_rx_module) {
- buf[0] = RPDUMP_SERVER;
- put_unaligned_be32(0, buf + 1);
- put_unaligned_be16(1, buf + 5);
- buf[7] = 0xf0 + nd->nd_rx_module;
- buf += 8;
- }
-
- nd->nd_mon_out = 0;
- nd->nd_mon_in = buf - nd->nd_mon_buf;
- nd->nd_mon_lbolt = jiffies;
-
-done_up:
- up(&nd->nd_mon_semaphore);
-
-done:
- if (rtn)
- module_put(THIS_MODULE);
- return rtn;
-}
-
-
-/**
- * dgrp_mon_release() - Close the MON device for a particular PortServer
- * @inode: struct inode *
- * @file: struct file *
- */
-static int dgrp_mon_release(struct inode *inode, struct file *file)
-{
- struct nd_struct *nd;
-
- /*
- * Get the node pointer, and quit if it doesn't exist.
- */
- nd = (struct nd_struct *)(file->private_data);
- if (!nd)
- goto done;
-
- /*
- * Free the monitor buffer.
- */
-
- down(&nd->nd_mon_semaphore);
-
- kfree(nd->nd_mon_buf);
- nd->nd_mon_buf = NULL;
- nd->nd_mon_out = nd->nd_mon_in;
-
- /*
- * Wakeup any thread waiting for buffer space.
- */
-
- if (nd->nd_mon_flag & MON_WAIT_SPACE) {
- nd->nd_mon_flag &= ~MON_WAIT_SPACE;
- wake_up_interruptible(&nd->nd_mon_wqueue);
- }
-
- up(&nd->nd_mon_semaphore);
-
- /*
- * Make sure there is no thread in the middle of writing a packet.
- */
- down(&nd->nd_net_semaphore);
- up(&nd->nd_net_semaphore);
-
-done:
- module_put(THIS_MODULE);
- file->private_data = NULL;
- return 0;
-}
-
-/**
- * dgrp_mon_read() -- Copy data from the monitoring buffer to the user
- */
-static ssize_t dgrp_mon_read(struct file *file, char __user *buf, size_t count,
- loff_t *ppos)
-{
- struct nd_struct *nd;
- int r;
- int offset = 0;
- int res = 0;
- ssize_t rtn;
-
- /*
- * Get the node pointer, and quit if it doesn't exist.
- */
- nd = (struct nd_struct *)(file->private_data);
- if (!nd)
- return -ENXIO;
-
- /*
- * Wait for some data to appear in the buffer.
- */
-
- down(&nd->nd_mon_semaphore);
-
- for (;;) {
- res = (nd->nd_mon_in - nd->nd_mon_out) & MON_MASK;
-
- if (res)
- break;
-
- nd->nd_mon_flag |= MON_WAIT_DATA;
-
- up(&nd->nd_mon_semaphore);
-
- /*
- * Go to sleep waiting until the condition becomes true.
- */
- rtn = wait_event_interruptible(nd->nd_mon_wqueue,
- ((nd->nd_mon_flag & MON_WAIT_DATA) == 0));
-
- if (rtn)
- return rtn;
-
- down(&nd->nd_mon_semaphore);
- }
-
- /*
- * Read whatever is there.
- */
-
- if (res > count)
- res = count;
-
- r = MON_MAX - nd->nd_mon_out;
-
- if (r <= res) {
- rtn = copy_to_user((void __user *)buf,
- nd->nd_mon_buf + nd->nd_mon_out, r);
- if (rtn) {
- up(&nd->nd_mon_semaphore);
- return -EFAULT;
- }
-
- nd->nd_mon_out = 0;
- res -= r;
- offset = r;
- }
-
- rtn = copy_to_user((void __user *) buf + offset,
- nd->nd_mon_buf + nd->nd_mon_out, res);
- if (rtn) {
- up(&nd->nd_mon_semaphore);
- return -EFAULT;
- }
-
- nd->nd_mon_out += res;
-
- *ppos += res;
-
- up(&nd->nd_mon_semaphore);
-
- /*
- * Wakeup any thread waiting for buffer space.
- */
-
- if (nd->nd_mon_flag & MON_WAIT_SPACE) {
- nd->nd_mon_flag &= ~MON_WAIT_SPACE;
- wake_up_interruptible(&nd->nd_mon_wqueue);
- }
-
- return res;
-}
-
-/* ioctl is not valid on monitor device */
-static long dgrp_mon_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- return -EINVAL;
-}
generated by cgit (git 2.34.1) at 2024-06-08 00:43:16 +0000