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 50 #define OSD_FIRST OSD_THREAD 51 #define OSD_LAST OSD_JAIL 52 53 typedef void (*osd_destructor_t)(void *value); 54 typedef int (*osd_method_t)(void *obj, void *data); 55 56 int osd_register(u_int type, osd_destructor_t destructor, 57 osd_method_t *methods); 58 void osd_deregister(u_int type, u_int slot); 59 60 int osd_set(u_int type, struct osd *osd, u_int slot, void *value); 61 void *osd_get(u_int type, struct osd *osd, u_int slot); 62 void osd_del(u_int type, struct osd *osd, u_int slot); 63 int osd_call(u_int type, u_int method, void *obj, void *data); 64 65 void osd_exit(u_int type, struct osd *osd); 66 67 #define osd_thread_register(destructor) \ 68 osd_register(OSD_THREAD, (destructor), NULL) 69 #define osd_thread_deregister(slot) \ 70 osd_deregister(OSD_THREAD, (slot)) 71 #define osd_thread_set(td, slot, value) \ 72 osd_set(OSD_THREAD, &(td)->td_osd, (slot), (value)) 73 #define osd_thread_get(td, slot) \ 74 osd_get(OSD_THREAD, &(td)->td_osd, (slot)) 75 #define osd_thread_del(td, slot) do { \ 76 KASSERT((td) == curthread, ("Not curthread.")); \ 77 osd_del(OSD_THREAD, &(td)->td_osd, (slot)); \ 78 } while (0) 79 #define osd_thread_call(td, method, data) \ 80 osd_call(OSD_THREAD, (method), (td), (data)) 81 #define osd_thread_exit(td) \ 82 osd_exit(OSD_THREAD, &(td)->td_osd) 83 84 #define osd_jail_register(destructor) \ 85 osd_register(OSD_JAIL, (destructor), NULL) 86 #define osd_jail_deregister(slot) \ 87 osd_deregister(OSD_JAIL, (slot)) 88 #define osd_jail_set(pr, slot, value) \ 89 osd_set(OSD_JAIL, &(pr)->pr_osd, (slot), (value)) 90 #define osd_jail_get(pr, slot) \ 91 osd_get(OSD_JAIL, &(pr)->pr_osd, (slot)) 92 #define osd_jail_del(pr, slot) \ 93 osd_del(OSD_JAIL, &(pr)->pr_osd, (slot)) 94 #define osd_jail_call(pr, method, data) \ 95 osd_call(OSD_JAIL, (method), (pr), (data)) 96 #define osd_jail_exit(pr) \ 97 osd_exit(OSD_JAIL, &(pr)->pr_osd) 98 99 #endif /* _KERNEL */ 100 101 #endif /* !_SYS_OSD_H_ */ 102