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/module_khelp.h

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    1 /*-
    2  * Copyright (c) 2010 Lawrence Stewart <lstewart@freebsd.org>
    3  * Copyright (c) 2010 The FreeBSD Foundation
    4  * All rights reserved.
    5  *
    6  * This software was developed by Lawrence Stewart while studying at the Centre
    7  * for Advanced Internet Architectures, Swinburne University of Technology, made
    8  * possible in part by grants from the FreeBSD Foundation and Cisco University
    9  * Research Program Fund at Community Foundation Silicon Valley.
   10  *
   11  * Portions of this software were developed at the Centre for Advanced
   12  * Internet Architectures, Swinburne University of Technology, Melbourne,
   13  * Australia by Lawrence Stewart under sponsorship from the FreeBSD Foundation.
   14  *
   15  * Redistribution and use in source and binary forms, with or without
   16  * modification, are permitted provided that the following conditions
   17  * are met:
   18  * 1. Redistributions of source code must retain the above copyright
   19  *    notice, this list of conditions and the following disclaimer.
   20  * 2. Redistributions in binary form must reproduce the above copyright
   21  *    notice, this list of conditions and the following disclaimer in the
   22  *    documentation and/or other materials provided with the distribution.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  * $FreeBSD: releng/9.1/sys/sys/module_khelp.h 220560 2011-04-12 08:13:18Z lstewart $
   37  */
   38 
   39 #ifndef _SYS_MODULE_KHELP_H_
   40 #define _SYS_MODULE_KHELP_H_
   41 
   42 /* XXXLAS: Needed for uma related typedefs. */
   43 #include <vm/uma.h>
   44 
   45 /* Helper flags. */
   46 #define HELPER_NEEDS_OSD        0x0001
   47 
   48 struct helper {
   49         int (*mod_init) (void);
   50         int (*mod_destroy) (void);
   51 #define HELPER_NAME_MAXLEN 16
   52         char                    h_name[HELPER_NAME_MAXLEN];
   53         uma_zone_t              h_zone;
   54         struct hookinfo         *h_hooks;
   55         uint32_t                h_nhooks;
   56         uint32_t                h_classes;
   57         int32_t                 h_id;
   58         volatile uint32_t       h_refcount;
   59         uint16_t                h_flags;
   60         TAILQ_ENTRY(helper)     h_next;
   61 };
   62 
   63 struct khelp_modevent_data {
   64         char                    name[HELPER_NAME_MAXLEN];
   65         struct helper           *helper;
   66         struct hookinfo         *hooks;
   67         int                     nhooks;
   68         int                     uma_zsize;
   69         uma_ctor                umactor;
   70         uma_dtor                umadtor;
   71 };
   72 
   73 #define KHELP_DECLARE_MOD(hname, hdata, hhooks, version)                \
   74         static struct khelp_modevent_data kmd_##hname = {               \
   75                 .name = #hname,                                         \
   76                 .helper = hdata                                         \
   77                 .hooks = hhooks,                                        \
   78                 .nhooks = sizeof(hhooks) / sizeof(hhooks[0]),           \
   79         };                                                              \
   80         static moduledata_t h_##hname = {                               \
   81                 .name = #hname,                                         \
   82                 .evhand = khelp_modevent,                               \
   83                 .priv = &kmd_##hname                                    \
   84         };                                                              \
   85         DECLARE_MODULE(hname, h_##hname, SI_SUB_PROTO_IFATTACHDOMAIN,   \
   86             SI_ORDER_ANY);                                              \
   87         MODULE_VERSION(hname, version)
   88 
   89 #define KHELP_DECLARE_MOD_UMA(hname, hdata, hhooks, version, size, ctor, dtor) \
   90         static struct khelp_modevent_data kmd_##hname = {               \
   91                 .name = #hname,                                         \
   92                 .helper = hdata,                                        \
   93                 .hooks = hhooks,                                        \
   94                 .nhooks = sizeof(hhooks) / sizeof(hhooks[0]),           \
   95                 .uma_zsize = size,                                      \
   96                 .umactor = ctor,                                        \
   97                 .umadtor = dtor                                         \
   98         };                                                              \
   99         static moduledata_t h_##hname = {                               \
  100                 .name = #hname,                                         \
  101                 .evhand = khelp_modevent,                               \
  102                 .priv = &kmd_##hname                                    \
  103         };                                                              \
  104         DECLARE_MODULE(hname, h_##hname, SI_SUB_PROTO_IFATTACHDOMAIN,   \
  105             SI_ORDER_ANY);                                              \
  106         MODULE_VERSION(hname, version)
  107 
  108 int     khelp_modevent(module_t mod, int type, void *data);
  109 
  110 #endif /* _SYS_MODULE_KHELP_H_ */

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