4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LNET
39 #include <linux/libcfs/libcfs.h>
41 #define LNET_MINOR 240
43 int libcfs_ioctl_getdata(char *buf, char *end, void *arg)
45 struct libcfs_ioctl_hdr *hdr;
46 struct libcfs_ioctl_data *data;
49 hdr = (struct libcfs_ioctl_hdr *)buf;
50 data = (struct libcfs_ioctl_data *)buf;
52 err = copy_from_user(buf, (void *)arg, sizeof(*hdr));
56 if (hdr->ioc_version != LIBCFS_IOCTL_VERSION) {
57 CERROR("PORTALS: version mismatch kernel vs application\n");
61 if (hdr->ioc_len + buf >= end) {
62 CERROR("PORTALS: user buffer exceeds kernel buffer\n");
67 if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
68 CERROR("PORTALS: user buffer too small for ioctl\n");
72 err = copy_from_user(buf, (void *)arg, hdr->ioc_len);
76 if (libcfs_ioctl_is_invalid(data)) {
77 CERROR("PORTALS: ioctl not correctly formatted\n");
81 if (data->ioc_inllen1)
82 data->ioc_inlbuf1 = &data->ioc_bulk[0];
84 if (data->ioc_inllen2)
85 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
86 cfs_size_round(data->ioc_inllen1);
91 int libcfs_ioctl_popdata(void *arg, void *data, int size)
93 if (copy_to_user((char *)arg, data, size))
98 extern struct cfs_psdev_ops libcfs_psdev_ops;
101 libcfs_psdev_open(struct inode * inode, struct file * file)
103 struct libcfs_device_userstate **pdu = NULL;
108 pdu = (struct libcfs_device_userstate **)&file->private_data;
109 if (libcfs_psdev_ops.p_open != NULL)
110 rc = libcfs_psdev_ops.p_open(0, (void *)pdu);
116 /* called when closing /dev/device */
118 libcfs_psdev_release(struct inode * inode, struct file * file)
120 struct libcfs_device_userstate *pdu;
125 pdu = file->private_data;
126 if (libcfs_psdev_ops.p_close != NULL)
127 rc = libcfs_psdev_ops.p_close(0, (void *)pdu);
133 static long libcfs_ioctl(struct file *file,
134 unsigned int cmd, unsigned long arg)
136 struct cfs_psdev_file pfile;
139 if (!capable(CAP_SYS_ADMIN))
142 if ( _IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
143 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
144 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR ) {
145 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
146 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
150 /* Handle platform-dependent IOC requests */
152 case IOC_LIBCFS_PANIC:
153 if (!cfs_capable(CFS_CAP_SYS_BOOT))
155 panic("debugctl-invoked panic");
157 case IOC_LIBCFS_MEMHOG:
158 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
164 pfile.private_data = file->private_data;
165 if (libcfs_psdev_ops.p_ioctl != NULL)
166 rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void *)arg);
172 static struct file_operations libcfs_fops = {
173 .unlocked_ioctl = libcfs_ioctl,
174 .open = libcfs_psdev_open,
175 .release = libcfs_psdev_release,
178 struct miscdevice libcfs_dev = {
181 .fops = &libcfs_fops,