module_khelp.h

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

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

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sys/sys/module_khelp.h