| /* |
| * 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, (void *)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, (void *)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; |
| } |
| |
| extern struct cfs_psdev_ops libcfs_psdev_ops; |
| |
| 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, |
| }; |