06a99fe36f
databases. - Make nsswitch support caching. Submitted by: Michael Bushkov <bushman__at__rsu.ru> Sponsored by: Google Summer of Code 2005
157 lines
5.1 KiB
C
157 lines
5.1 KiB
C
/*-
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* Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __CACHED_CONFIG_H__
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#define __CACHED_CONFIG_H__
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <pthread.h>
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#include <nsswitch.h>
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#include <unistd.h>
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#include "cachelib.h"
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#define DEFAULT_QUERY_TIMEOUT 8
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#define DEFAULT_THREADS_NUM 8
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#define DEFAULT_COMMON_ENTRY_TIMEOUT 10
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#define DEFAULT_MP_ENTRY_TIMEOUT 60
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#define DEFAULT_CACHE_HT_SIZE 257
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#define INITIAL_ENTRIES_CAPACITY 8
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#define DEFAULT_SOCKET_PATH "/var/run/cached"
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#define DEFAULT_PIDFILE_PATH "/var/run/cached.pid"
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#define DEFAULT_POSITIVE_ELEMENTS_SIZE (2048)
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#define DEFAULT_POSITIVE_LIFETIME (3600)
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#define DEFAULT_NEGATIVE_ELEMENTS_SIZE (2048)
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#define DEFAULT_NEGATIVE_LIFETIME (60)
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#define DEFAULT_MULTIPART_ELEMENTS_SIZE (1024 * 8)
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#define DEFAULT_MULITPART_SESSIONS_SIZE (1024)
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#define DEFAULT_MULITPART_LIFETIME (3600)
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extern const char *c_default_entries[6];
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/*
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* Configuration entry represents the details of each cache entry in the
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* config file (i.e. passwd or group). Its purpose also is to acquire locks
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* of three different types (for usual read/write caching, for multipart
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* caching and for caching of the negative results) for that cache entry.
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*/
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struct configuration_entry {
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struct common_cache_entry_params positive_cache_params;
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struct common_cache_entry_params negative_cache_params;
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struct mp_cache_entry_params mp_cache_params;
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/*
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* configuration_entry holds pointers for all actual cache_entries,
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* which are used for it. There is one for positive caching, one for
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* for negative caching, and several (one per each euid/egid) for
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* multipart caching.
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*/
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cache_entry positive_cache_entry;
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cache_entry negative_cache_entry;
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cache_entry *mp_cache_entries;
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size_t mp_cache_entries_size;
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struct timeval common_query_timeout;
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struct timeval mp_query_timeout;
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char *name;
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pthread_mutex_t positive_cache_lock;
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pthread_mutex_t negative_cache_lock;
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pthread_mutex_t mp_cache_lock;
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int perform_actual_lookups;
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int enabled;
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};
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/*
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* Contains global configuration options and array of all configuration entries
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*/
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struct configuration {
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char *pidfile_path;
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char *socket_path;
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struct configuration_entry **entries;
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size_t entries_capacity;
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size_t entries_size;
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pthread_rwlock_t rwlock;
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mode_t socket_mode;
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int force_unlink;
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int query_timeout;
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int threads_num;
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};
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enum config_entry_lock_type {
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CELT_POSITIVE,
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CELT_NEGATIVE,
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CELT_MULTIPART
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};
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extern struct configuration *init_configuration(void);
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extern void destroy_configuration(struct configuration *);
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extern void fill_configuration_defaults(struct configuration *);
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extern int add_configuration_entry(struct configuration *,
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struct configuration_entry *);
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extern struct configuration_entry *create_def_configuration_entry(
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const char *);
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extern void destroy_configuration_entry(struct configuration_entry *);
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extern size_t configuration_get_entries_size(struct configuration *);
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extern struct configuration_entry *configuration_get_entry(
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struct configuration *, size_t);
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extern struct configuration_entry *configuration_find_entry(
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struct configuration *, const char *);
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extern int configuration_entry_add_mp_cache_entry(struct configuration_entry *,
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cache_entry);
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extern cache_entry configuration_entry_find_mp_cache_entry(
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struct configuration_entry *,
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const char *);
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extern int configuration_entry_find_mp_cache_entries(
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struct configuration_entry *, const char *, cache_entry **,
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cache_entry **);
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extern void configuration_lock_rdlock(struct configuration *config);
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extern void configuration_lock_wrlock(struct configuration *config);
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extern void configuration_unlock(struct configuration *config);
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extern void configuration_lock_entry(struct configuration_entry *,
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enum config_entry_lock_type);
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extern void configuration_unlock_entry(struct configuration_entry *,
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enum config_entry_lock_type);
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#endif
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