FreeBSD/Linux Kernel Cross Reference
sys/sys/osd.h
1 /*-
2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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 AUTHORS 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 AUTHORS 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 * $FreeBSD$
27 */
28
29 #ifndef _SYS_OSD_H_
30 #define _SYS_OSD_H_
31
32 #include <sys/queue.h>
33
34 /*
35 * Lock key:
36 * (c) container lock (e.g. jail's pr_mtx) and/or osd_object_lock
37 * (l) osd_list_lock
38 */
39 struct osd {
40 u_int osd_nslots; /* (c) */
41 void **osd_slots; /* (c) */
42 LIST_ENTRY(osd) osd_next; /* (l) */
43 };
44
45 #ifdef _KERNEL
46
47 #define OSD_THREAD 0
48 #define OSD_JAIL 1
49 #define OSD_KHELP 2
50
51 #define OSD_FIRST OSD_THREAD
52 #define OSD_LAST OSD_KHELP
53
54 typedef void (*osd_destructor_t)(void *value);
55 typedef int (*osd_method_t)(void *obj, void *data);
56
57 int osd_register(u_int type, osd_destructor_t destructor,
58 osd_method_t *methods);
59 void osd_deregister(u_int type, u_int slot);
60
61 int osd_set(u_int type, struct osd *osd, u_int slot, void *value);
62 void *osd_get(u_int type, struct osd *osd, u_int slot);
63 void osd_del(u_int type, struct osd *osd, u_int slot);
64 int osd_call(u_int type, u_int method, void *obj, void *data);
65
66 void osd_exit(u_int type, struct osd *osd);
67
68 #define osd_thread_register(destructor) \
69 osd_register(OSD_THREAD, (destructor), NULL)
70 #define osd_thread_deregister(slot) \
71 osd_deregister(OSD_THREAD, (slot))
72 #define osd_thread_set(td, slot, value) \
73 osd_set(OSD_THREAD, &(td)->td_osd, (slot), (value))
74 #define osd_thread_get(td, slot) \
75 osd_get(OSD_THREAD, &(td)->td_osd, (slot))
76 #define osd_thread_del(td, slot) do { \
77 KASSERT((td) == curthread, ("Not curthread.")); \
78 osd_del(OSD_THREAD, &(td)->td_osd, (slot)); \
79 } while (0)
80 #define osd_thread_call(td, method, data) \
81 osd_call(OSD_THREAD, (method), (td), (data))
82 #define osd_thread_exit(td) \
83 osd_exit(OSD_THREAD, &(td)->td_osd)
84
85 #define osd_jail_register(destructor, methods) \
86 osd_register(OSD_JAIL, (destructor), (methods))
87 #define osd_jail_deregister(slot) \
88 osd_deregister(OSD_JAIL, (slot))
89 #define osd_jail_set(pr, slot, value) \
90 osd_set(OSD_JAIL, &(pr)->pr_osd, (slot), (value))
91 #define osd_jail_get(pr, slot) \
92 osd_get(OSD_JAIL, &(pr)->pr_osd, (slot))
93 #define osd_jail_del(pr, slot) \
94 osd_del(OSD_JAIL, &(pr)->pr_osd, (slot))
95 #define osd_jail_call(pr, method, data) \
96 osd_call(OSD_JAIL, (method), (pr), (data))
97 #define osd_jail_exit(pr) \
98 osd_exit(OSD_JAIL, &(pr)->pr_osd)
99
100 #endif /* _KERNEL */
101
102 #endif /* !_SYS_OSD_H_ */
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