mapped_cache.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef __MAPPED_CACHE_H
#define __MAPPED_CACHE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include "cache.h"
#define SECTION_UADDR 0 /* cache manager's uaddr */
#define SECTION_BINDING 1 /* list of bound directories */
#define SECTION_ACTIVE 2 /* list of active servers */
#define NUM_SECTIONS 3
#define SHARED_CACHE_TTL (6*24*60*60)
struct CacheSection {
int count;
int offset;
int length;
};
struct CacheHeader {
int version;
int valid;
int map_size;
int data_size;
CacheSection sections[NUM_SECTIONS];
};
struct BindingEntry {
char *base;
int offset;
int length;
uint32_t exp_time;
int min_rank;
int optimal_rank;
int levels;
char **broken_name;
int binding_len;
void *binding;
};
struct ActiveEntry {
char *base;
int offset;
int length;
endpoint ep;
int active_len;
void *active;
};
class NisMappedCache : public NisCache {
public:
NisMappedCache(nis_error &error, int serverMode = 0,
int discardOldCache = 0);
~NisMappedCache();
nis_error searchDir(char *dname,
nis_bound_directory **binding, int near);
void addBinding(nis_bound_directory *binding);
void removeBinding(nis_bound_directory *binding);
void print();
void activeAdd(nis_active_endpoint *act);
void activeRemove(endpoint *ep, int all);
int activeCheck(endpoint *ep);
int activeGet(endpoint *ep, nis_active_endpoint **act);
int activeCheckInternal(endpoint *ep);
int activeGetInternal(endpoint *ep, nis_active_endpoint **act);
int getStaleEntries(nis_bound_directory ***bindings);
int getAllEntries(nis_bound_directory ***bindings);
int nextStale();
int getAllActive(nis_active_endpoint ***actlist);
int updateUaddr(char *uaddr);
char *getUaddr();
void markUp();
void markDown();
int checkUp();
void *operator new(size_t bytes) { return calloc(1, bytes); }
void operator delete(void *arg) { free(arg); }
private:
rwlock_t lock;
int up;
int serverMode;
char *mapBase;
int mapSize;
ino_t mapInode;
dev_t mapDev;
CacheHeader *header;
int sem_writer;
time_t mapTime;
int checkUID();
int createSemaphores();
int getSemaphores();
int mapCache(int discardOldCache);
int mapCache();
void unmapCache();
int createCache();
void freeSpace(int offset, int size, int section);
int addSpace(int offset, int size, int sect);
void writeCache(int offset, char *src, int len);
int createBindingEntry(nis_bound_directory *binding,
BindingEntry *entry);
void readBinding(BindingEntry *entry, int offset);
void firstBinding(BindingEntry *entry);
void nextBinding(BindingEntry *entry);
int createActiveEntry(ActiveEntry *entry, nis_active_endpoint *act);
void readActiveEntry(ActiveEntry *entry, int offset);
void firstActiveEntry(ActiveEntry *entry);
void nextActiveEntry(ActiveEntry *entry);
int align(int n);
intptr_t align_ipt(intptr_t n);
int updatePublicCache();
int lockExclusive();
void unlockExclusive();
int lockShared();
void unlockShared();
CacheHeader *mapSharedCacheHeader();
void markSharedCacheInvalid(CacheHeader *hdr);
};
#ifdef __cplusplus
}
#endif
#endif /* __MAPPED_CACHE_H */