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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LNET
35 #include <libcfs/libcfs.h>
37 #define LNET_MINOR 240
39 static inline size_t libcfs_ioctl_packlen(struct libcfs_ioctl_data *data)
41 size_t len = sizeof(*data);
43 len += (data->ioc_inllen1 + 7) & ~7;
44 len += (data->ioc_inllen2 + 7) & ~7;
48 static bool libcfs_ioctl_is_invalid(struct libcfs_ioctl_data *data)
50 if (data->ioc_hdr.ioc_len > BIT(30))
53 if (data->ioc_inllen1 > BIT(30))
56 if (data->ioc_inllen2 > BIT(30))
59 if (data->ioc_inlbuf1 && !data->ioc_inllen1)
62 if (data->ioc_inlbuf2 && !data->ioc_inllen2)
65 if (data->ioc_pbuf1 && !data->ioc_plen1)
68 if (data->ioc_pbuf2 && !data->ioc_plen2)
71 if (data->ioc_plen1 && !data->ioc_pbuf1)
74 if (data->ioc_plen2 && !data->ioc_pbuf2)
77 if (libcfs_ioctl_packlen(data) != data->ioc_hdr.ioc_len)
80 if (data->ioc_inllen1 &&
81 data->ioc_bulk[((data->ioc_inllen1 + 7) & ~7) +
82 data->ioc_inllen2 - 1] != '\0')
88 int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
92 if (libcfs_ioctl_is_invalid(data)) {
93 CERROR("libcfs ioctl: parameter not correctly formatted\n");
97 if (data->ioc_inllen1 != 0)
98 data->ioc_inlbuf1 = &data->ioc_bulk[0];
100 if (data->ioc_inllen2 != 0)
101 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
102 cfs_size_round(data->ioc_inllen1);
107 int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
108 struct libcfs_ioctl_hdr __user *uhdr)
110 struct libcfs_ioctl_hdr hdr;
114 if (copy_from_user(&hdr, uhdr, sizeof(hdr)))
117 if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
118 hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
119 CERROR("libcfs ioctl: version mismatch expected %#x, got %#x\n",
120 LIBCFS_IOCTL_VERSION, hdr.ioc_version);
124 if (hdr.ioc_len < sizeof(struct libcfs_ioctl_hdr)) {
125 CERROR("libcfs ioctl: user buffer too small for ioctl\n");
129 if (hdr.ioc_len > LIBCFS_IOC_DATA_MAX) {
130 CERROR("libcfs ioctl: user buffer is too large %d/%d\n",
131 hdr.ioc_len, LIBCFS_IOC_DATA_MAX);
135 LIBCFS_ALLOC(*hdr_pp, hdr.ioc_len);
139 if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len))
140 GOTO(failed, err = -EFAULT);
144 LIBCFS_FREE(*hdr_pp, hdr.ioc_len);
149 libcfs_psdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
151 if (!capable(CAP_SYS_ADMIN))
154 if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
155 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
156 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
157 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
158 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
162 return libcfs_ioctl(cmd, (void __user *)arg);
165 static struct file_operations libcfs_fops = {
166 .owner = THIS_MODULE,
167 .unlocked_ioctl = libcfs_psdev_ioctl,
170 struct miscdevice libcfs_dev = {