1/*-
2 * Copyright (c) 2014 Vassilis Laganakos
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/exec.h>
33#include <sys/imgact.h>
34#include <sys/imgact_elf.h>
35#include <sys/kernel.h>
36#include <sys/malloc.h>
37#include <sys/mutex.h>
38#include <sys/sx.h>
39
40#include <compat/linux/linux.h>
41#include <compat/linux/linux_emul.h>
42#include <compat/linux/linux_ioctl.h>
43#include <compat/linux/linux_mib.h>
44#include <compat/linux/linux_util.h>
45
46SET_DECLARE(linux_device_handler_set, struct linux_device_handler);
47
48TAILQ_HEAD(, linux_ioctl_handler_element) linux_ioctl_handlers =
49    TAILQ_HEAD_INITIALIZER(linux_ioctl_handlers);
50struct sx linux_ioctl_sx;
51SX_SYSINIT(linux_ioctl, &linux_ioctl_sx, "Linux ioctl handlers");
52
53static int
54linux_common_modevent(module_t mod, int type, void *data)
55{
56	struct linux_device_handler **ldhp;
57
58	switch(type) {
59	case MOD_LOAD:
60#ifdef INVARIANTS
61		linux_check_errtbl();
62#endif
63		linux_dev_shm_create();
64		linux_osd_jail_register();
65		SET_FOREACH(ldhp, linux_device_handler_set)
66			linux_device_register_handler(*ldhp);
67		LIST_INIT(&futex_list);
68		mtx_init(&futex_mtx, "ftllk", NULL, MTX_DEF);
69		break;
70	case MOD_UNLOAD:
71		linux_dev_shm_destroy();
72		linux_osd_jail_deregister();
73		SET_FOREACH(ldhp, linux_device_handler_set)
74			linux_device_unregister_handler(*ldhp);
75		mtx_destroy(&futex_mtx);
76		break;
77	default:
78		return (EOPNOTSUPP);
79	}
80	return (0);
81}
82
83static moduledata_t linux_common_mod = {
84	"linux_common",
85	linux_common_modevent,
86	0
87};
88
89DECLARE_MODULE(linux_common, linux_common_mod, SI_SUB_EXEC, SI_ORDER_ANY);
90MODULE_VERSION(linux_common, 1);
91