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      1 /*	$NetBSD: rf_shutdown.c,v 1.21 2021/07/21 23:10:12 oster Exp $	*/
      2 /*
      3  * rf_shutdown.c
      4  */
      5 /*
      6  * Copyright (c) 1996 Carnegie-Mellon University.
      7  * All rights reserved.
      8  *
      9  * Author: Jim Zelenka
     10  *
     11  * Permission to use, copy, modify and distribute this software and
     12  * its documentation is hereby granted, provided that both the copyright
     13  * notice and this permission notice appear in all copies of the
     14  * software, derivative works or modified versions, and any portions
     15  * thereof, and that both notices appear in supporting documentation.
     16  *
     17  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     18  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     19  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     20  *
     21  * Carnegie Mellon requests users of this software to return to
     22  *
     23  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     24  *  School of Computer Science
     25  *  Carnegie Mellon University
     26  *  Pittsburgh PA 15213-3890
     27  *
     28  * any improvements or extensions that they make and grant Carnegie the
     29  * rights to redistribute these changes.
     30  */
     31 /*
     32  * Maintain lists of cleanup functions. Also, mechanisms for coordinating
     33  * thread startup and shutdown.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: rf_shutdown.c,v 1.21 2021/07/21 23:10:12 oster Exp $");
     38 
     39 #include <dev/raidframe/raidframevar.h>
     40 
     41 #include "rf_archs.h"
     42 #include "rf_shutdown.h"
     43 #include "rf_debugMem.h"
     44 
     45 
     46 #ifndef RF_DEBUG_SHUTDOWN
     47 #define RF_DEBUG_SHUTDOWN 0
     48 #endif
     49 
     50 static void rf_FreeShutdownEnt(RF_ShutdownList_t *);
     51 
     52 static void
     53 rf_FreeShutdownEnt(RF_ShutdownList_t *ent)
     54 {
     55 	free(ent, M_RAIDFRAME);
     56 }
     57 
     58 #if RF_DEBUG_SHUTDOWN
     59 void
     60 _rf_ShutdownCreate(RF_ShutdownList_t **listp,  void (*cleanup)(void *arg),
     61 		   void *arg, char *file, int line)
     62 #else
     63 void
     64 _rf_ShutdownCreate(RF_ShutdownList_t **listp,  void (*cleanup)(void *arg),
     65 		   void *arg)
     66 #endif
     67 {
     68 	RF_ShutdownList_t *ent;
     69 
     70 	/*
     71          * Have to directly allocate memory here, since we start up before
     72          * and shutdown after RAIDframe internal allocation system.
     73          */
     74 	ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
     75 					   M_RAIDFRAME, M_WAITOK);
     76 	ent->cleanup = cleanup;
     77 	ent->arg = arg;
     78 #if RF_DEBUG_SHUTDOWN
     79 	ent->file = file;
     80 	ent->line = line;
     81 #endif
     82 	ent->next = *listp;
     83 	*listp = ent;
     84 }
     85 
     86 void
     87 rf_ShutdownList(RF_ShutdownList_t **list)
     88 {
     89 	RF_ShutdownList_t *r, *next;
     90 #if RF_DEBUG_SHUTDOWN
     91 	char   *file;
     92 	int     line;
     93 #endif
     94 
     95 	for (r = *list; r; r = next) {
     96 		next = r->next;
     97 #if RF_DEBUG_SHUTDOWN
     98 		file = r->file;
     99 		line = r->line;
    100 
    101 		if (rf_shutdownDebug) {
    102 			printf("call shutdown, created %s:%d\n", file, line);
    103 		}
    104 #endif
    105 		r->cleanup(r->arg);
    106 #if RF_DEBUG_SHUTDOWN
    107 		if (rf_shutdownDebug) {
    108 			printf("completed shutdown, created %s:%d\n", file, line);
    109 		}
    110 #endif
    111 		rf_FreeShutdownEnt(r);
    112 	}
    113 	*list = NULL;
    114 }
    115