The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/osd.h

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    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: releng/8.1/sys/sys/osd.h 199583 2009-11-20 15:27:52Z jhb $
   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, methods)                          \
   85         osd_register(OSD_JAIL, (destructor), (methods))
   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_ */

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