Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | /*
* 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_getdata(char *buf, char *end, void *arg)
{
struct libcfs_ioctl_hdr *hdr;
struct libcfs_ioctl_data *data;
int orig_len;
hdr = (struct libcfs_ioctl_hdr *)buf;
data = (struct libcfs_ioctl_data *)buf;
if (copy_from_user(buf, arg, sizeof(*hdr)))
return -EFAULT;
if (hdr->ioc_version != LIBCFS_IOCTL_VERSION) {
CERROR("PORTALS: version mismatch kernel vs application\n");
return -EINVAL;
}
if (hdr->ioc_len >= end - buf) {
CERROR("PORTALS: user buffer exceeds kernel buffer\n");
return -EINVAL;
}
if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
CERROR("PORTALS: user buffer too small for ioctl\n");
return -EINVAL;
}
orig_len = hdr->ioc_len;
if (copy_from_user(buf, arg, hdr->ioc_len))
return -EFAULT;
if (orig_len != data->ioc_len)
return -EINVAL;
if (libcfs_ioctl_is_invalid(data)) {
CERROR("PORTALS: 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_popdata(void *arg, void *data, int size)
{
if (copy_to_user((char *)arg, data, size))
return -EFAULT;
return 0;
}
static int
libcfs_psdev_open(struct inode *inode, struct file *file)
{
struct libcfs_device_userstate **pdu = NULL;
int rc = 0;
if (!inode)
return -EINVAL;
pdu = (struct libcfs_device_userstate **)&file->private_data;
if (libcfs_psdev_ops.p_open != NULL)
rc = libcfs_psdev_ops.p_open(0, (void *)pdu);
else
return -EPERM;
return rc;
}
/* called when closing /dev/device */
static int
libcfs_psdev_release(struct inode *inode, struct file *file)
{
struct libcfs_device_userstate *pdu;
int rc = 0;
if (!inode)
return -EINVAL;
pdu = file->private_data;
if (libcfs_psdev_ops.p_close != NULL)
rc = libcfs_psdev_ops.p_close(0, (void *)pdu);
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;
case IOC_LIBCFS_MEMHOG:
if (!capable(CFS_CAP_SYS_ADMIN))
return -EPERM;
/* go thought */
}
pfile.off = 0;
pfile.private_data = file->private_data;
if (libcfs_psdev_ops.p_ioctl != NULL)
rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void *)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,
};
|