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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_LNET
#include "../../../include/linux/libcfs/libcfs.h"
#define LNET_MINOR 240
int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
{
if (libcfs_ioctl_is_invalid(data)) {
CERROR("LNET: ioctl not correctly formatted\n");
return -EINVAL;
}
if (data->ioc_inllen1)
data->ioc_inlbuf1 = &data->ioc_bulk[0];
if (data->ioc_inllen2)
data->ioc_inlbuf2 = &data->ioc_bulk[0] +
cfs_size_round(data->ioc_inllen1);
return 0;
}
int libcfs_ioctl_getdata_len(const struct libcfs_ioctl_hdr __user *arg,
__u32 *len)
{
struct libcfs_ioctl_hdr hdr;
if (copy_from_user(&hdr, arg, sizeof(hdr)))
return -EFAULT;
if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
CERROR("LNET: version mismatch expected %#x, got %#x\n",
LIBCFS_IOCTL_VERSION, hdr.ioc_version);
return -EINVAL;
}
*len = hdr.ioc_len;
return 0;
}
int libcfs_ioctl_popdata(void __user *arg, void *data, int size)
{
if (copy_to_user(arg, data, size))
return -EFAULT;
return 0;
}
static int
libcfs_psdev_open(struct inode *inode, struct file *file)
{
int rc = 0;
if (!inode)
return -EINVAL;
if (libcfs_psdev_ops.p_open)
rc = libcfs_psdev_ops.p_open(0, NULL);
else
return -EPERM;
return rc;
}
/* called when closing /dev/device */
static int
libcfs_psdev_release(struct inode *inode, struct file *file)
{
int rc = 0;
if (!inode)
return -EINVAL;
if (libcfs_psdev_ops.p_close)
rc = libcfs_psdev_ops.p_close(0, NULL);
else
rc = -EPERM;
return rc;
}
static long libcfs_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
struct cfs_psdev_file pfile;
int rc = 0;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
_IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
_IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
_IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
return -EINVAL;
}
/* Handle platform-dependent IOC requests */
switch (cmd) {
case IOC_LIBCFS_PANIC:
if (!capable(CFS_CAP_SYS_BOOT))
return -EPERM;
panic("debugctl-invoked panic");
return 0;
}
if (libcfs_psdev_ops.p_ioctl)
rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void __user *)arg);
else
rc = -EPERM;
return rc;
}
static const struct file_operations libcfs_fops = {
.unlocked_ioctl = libcfs_ioctl,
.open = libcfs_psdev_open,
.release = libcfs_psdev_release,
};
struct miscdevice libcfs_dev = {
.minor = LNET_MINOR,
.name = "lnet",
.fops = &libcfs_fops,
};
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