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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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26 * Copyright (c) 2012, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
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33 #define DEBUG_SUBSYSTEM S_LNET
35 #include "../../../include/linux/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 += cfs_size_round(data->ioc_inllen1);
44 len += cfs_size_round(data->ioc_inllen2);
48 static inline bool libcfs_ioctl_is_invalid(struct libcfs_ioctl_data *data)
50 if (data->ioc_hdr.ioc_len > BIT(30)) {
51 CERROR("LIBCFS ioctl: ioc_len larger than 1<<30\n");
54 if (data->ioc_inllen1 > BIT(30)) {
55 CERROR("LIBCFS ioctl: ioc_inllen1 larger than 1<<30\n");
58 if (data->ioc_inllen2 > BIT(30)) {
59 CERROR("LIBCFS ioctl: ioc_inllen2 larger than 1<<30\n");
62 if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
63 CERROR("LIBCFS ioctl: inlbuf1 pointer but 0 length\n");
66 if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
67 CERROR("LIBCFS ioctl: inlbuf2 pointer but 0 length\n");
70 if (data->ioc_pbuf1 && !data->ioc_plen1) {
71 CERROR("LIBCFS ioctl: pbuf1 pointer but 0 length\n");
74 if (data->ioc_pbuf2 && !data->ioc_plen2) {
75 CERROR("LIBCFS ioctl: pbuf2 pointer but 0 length\n");
78 if (data->ioc_plen1 && !data->ioc_pbuf1) {
79 CERROR("LIBCFS ioctl: plen1 nonzero but no pbuf1 pointer\n");
82 if (data->ioc_plen2 && !data->ioc_pbuf2) {
83 CERROR("LIBCFS ioctl: plen2 nonzero but no pbuf2 pointer\n");
86 if ((__u32)libcfs_ioctl_packlen(data) != data->ioc_hdr.ioc_len) {
87 CERROR("LIBCFS ioctl: packlen != ioc_len\n");
90 if (data->ioc_inllen1 &&
91 data->ioc_bulk[data->ioc_inllen1 - 1] != '\0') {
92 CERROR("LIBCFS ioctl: inlbuf1 not 0 terminated\n");
95 if (data->ioc_inllen2 &&
96 data->ioc_bulk[cfs_size_round(data->ioc_inllen1) +
97 data->ioc_inllen2 - 1] != '\0') {
98 CERROR("LIBCFS ioctl: inlbuf2 not 0 terminated\n");
104 int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
106 if (libcfs_ioctl_is_invalid(data)) {
107 CERROR("libcfs ioctl: parameter not correctly formatted\n");
111 if (data->ioc_inllen1)
112 data->ioc_inlbuf1 = &data->ioc_bulk[0];
114 if (data->ioc_inllen2)
115 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
116 cfs_size_round(data->ioc_inllen1);
121 int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
122 const struct libcfs_ioctl_hdr __user *uhdr)
124 struct libcfs_ioctl_hdr hdr;
127 if (copy_from_user(&hdr, uhdr, sizeof(hdr)))
130 if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
131 hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
132 CERROR("libcfs ioctl: version mismatch expected %#x, got %#x\n",
133 LIBCFS_IOCTL_VERSION, hdr.ioc_version);
137 if (hdr.ioc_len < sizeof(struct libcfs_ioctl_data)) {
138 CERROR("libcfs ioctl: user buffer too small for ioctl\n");
142 if (hdr.ioc_len > LIBCFS_IOC_DATA_MAX) {
143 CERROR("libcfs ioctl: user buffer is too large %d/%d\n",
144 hdr.ioc_len, LIBCFS_IOC_DATA_MAX);
148 LIBCFS_ALLOC(*hdr_pp, hdr.ioc_len);
152 if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len)) {
153 LIBCFS_FREE(*hdr_pp, hdr.ioc_len);
160 libcfs_psdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
162 if (!capable(CAP_SYS_ADMIN))
165 if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
166 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
167 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
168 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
169 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
173 return libcfs_ioctl(cmd, (void __user *)arg);
176 static const struct file_operations libcfs_fops = {
177 .owner = THIS_MODULE,
178 .unlocked_ioctl = libcfs_psdev_ioctl,
181 struct miscdevice libcfs_dev = {
184 .fops = &libcfs_fops,