1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 #define DEBUG_SUBSYSTEM S_LNET
40 #include <libcfs/libcfs.h>
42 #define LIBCFS_MINOR 240
44 int libcfs_ioctl_getdata(char *buf, char *end, void *arg)
46 struct libcfs_ioctl_hdr *hdr;
47 struct libcfs_ioctl_data *data;
51 hdr = (struct libcfs_ioctl_hdr *)buf;
52 data = (struct libcfs_ioctl_data *)buf;
54 err = cfs_copy_from_user(buf, (void *)arg, sizeof(*hdr));
58 if (hdr->ioc_version != LIBCFS_IOCTL_VERSION) {
59 CERROR("LIBCFS: version mismatch kernel vs application\n");
63 if (hdr->ioc_len + buf >= end) {
64 CERROR("LIBCFS: user buffer exceeds kernel buffer\n");
68 if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
69 CERROR("LIBCFS: user buffer too small for ioctl\n");
73 err = cfs_copy_from_user(buf, (void *)arg, hdr->ioc_len);
77 if (libcfs_ioctl_is_invalid(data)) {
78 CERROR("LIBCFS: ioctl not correctly formatted\n");
82 if (data->ioc_inllen1)
83 data->ioc_inlbuf1 = &data->ioc_bulk[0];
85 if (data->ioc_inllen2)
86 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
87 cfs_size_round(data->ioc_inllen1);
92 int libcfs_ioctl_popdata(void *arg, void *data, int size)
94 if (cfs_copy_to_user((char *)arg, data, size))
99 extern struct cfs_psdev_ops libcfs_psdev_ops;
102 libcfs_psdev_open(struct inode *in, cfs_file_t * file)
104 struct libcfs_device_userstate **pdu = NULL;
107 pdu = (struct libcfs_device_userstate **)&file->private_data;
108 if (libcfs_psdev_ops.p_open != NULL)
109 rc = libcfs_psdev_ops.p_open(0, (void *)pdu);
115 /* called when closing /dev/device */
117 libcfs_psdev_release(struct inode *in, cfs_file_t * file)
119 struct libcfss_device_userstate *pdu;
122 pdu = file->private_data;
123 if (libcfs_psdev_ops.p_close != NULL)
124 rc = libcfs_psdev_ops.p_close(0, (void *)pdu);
131 libcfs_ioctl(cfs_file_t * file, unsigned int cmd, ulong_ptr_t arg)
133 struct cfs_psdev_file pfile;
136 if ( _IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
137 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
138 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR ) {
139 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
140 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
144 /* Handle platform-dependent IOC requests */
146 case IOC_LIBCFS_PANIC:
147 if (!cfs_capable(CFS_CAP_SYS_BOOT))
149 CERROR("debugctl-invoked panic");
150 KeBugCheckEx('LUFS', (ULONG_PTR)libcfs_ioctl, (ULONG_PTR)NULL, (ULONG_PTR)NULL, (ULONG_PTR)NULL);
153 case IOC_LIBCFS_MEMHOG:
155 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
161 pfile.private_data = file->private_data;
162 if (libcfs_psdev_ops.p_ioctl != NULL)
163 rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void *)arg);
169 static struct file_operations libcfs_fops = {
170 /* owner */ THIS_MODULE,
174 /* ioctl: */ libcfs_ioctl,
175 /* open: */ libcfs_psdev_open,
176 /* release:*/ libcfs_psdev_release
179 cfs_psdev_t libcfs_dev = {