- Extend the nsswitch to support Services, Protocols and Rpc

  databases.
- Make nsswitch support caching.

Submitted by:	Michael Bushkov <bushman__at__rsu.ru>
Sponsored by:	Google Summer of Code 2005

1 files changed, 156 insertions, 0 deletions

diff --git a/usr.sbin/nscd/config.h b/usr.sbin/nscd/config.h
new file mode 100644
index 0000000..b54dc9b
--- /dev/null
+++ b/usr.sbin/nscd/config.h
@@ -0,0 +1,156 @@
+/*-
+ * Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __CACHED_CONFIG_H__
+#define __CACHED_CONFIG_H__
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <pthread.h>
+#include <nsswitch.h>
+#include <unistd.h>
+#include "cachelib.h"
+
+#define DEFAULT_QUERY_TIMEOUT		8
+#define DEFAULT_THREADS_NUM		8
+
+#define DEFAULT_COMMON_ENTRY_TIMEOUT	10
+#define DEFAULT_MP_ENTRY_TIMEOUT	60
+#define DEFAULT_CACHE_HT_SIZE		257
+
+#define INITIAL_ENTRIES_CAPACITY	8
+#define DEFAULT_SOCKET_PATH		"/var/run/cached"
+#define DEFAULT_PIDFILE_PATH		"/var/run/cached.pid"
+
+#define DEFAULT_POSITIVE_ELEMENTS_SIZE	(2048)
+#define DEFAULT_POSITIVE_LIFETIME 	(3600)
+
+#define DEFAULT_NEGATIVE_ELEMENTS_SIZE	(2048)
+#define DEFAULT_NEGATIVE_LIFETIME	(60)
+
+#define DEFAULT_MULTIPART_ELEMENTS_SIZE	(1024 * 8)
+#define DEFAULT_MULITPART_SESSIONS_SIZE	(1024)
+#define DEFAULT_MULITPART_LIFETIME	(3600)
+
+extern const char *c_default_entries[6];
+
+/*
+ * Configuration entry represents the details of each cache entry in the
+ * config file (i.e. passwd or group). Its purpose also is to acquire locks
+ * of three different types (for usual read/write caching, for multipart
+ * caching and for caching of the negative results) for that cache entry.
+ */
+struct configuration_entry {
+	struct common_cache_entry_params positive_cache_params;
+	struct common_cache_entry_params negative_cache_params;
+	struct mp_cache_entry_params mp_cache_params;
+
+	/*
+	 * configuration_entry holds pointers for all actual cache_entries,
+	 * which are used for it. There is one for positive caching, one for
+	 * for negative caching, and several (one per each euid/egid) for
+	 * multipart caching.
+	 */
+	cache_entry positive_cache_entry;
+	cache_entry negative_cache_entry;
+
+	cache_entry *mp_cache_entries;
+	size_t mp_cache_entries_size;
+
+	struct timeval common_query_timeout;
+	struct timeval mp_query_timeout;
+
+	char	*name;
+	pthread_mutex_t positive_cache_lock;
+	pthread_mutex_t negative_cache_lock;
+	pthread_mutex_t mp_cache_lock;
+
+	int	perform_actual_lookups;
+	int	enabled;
+};
+
+/*
+ * Contains global configuration options and array of all configuration entries
+ */
+struct configuration {
+	char	*pidfile_path;
+	char	*socket_path;
+
+	struct configuration_entry **entries;
+	size_t	entries_capacity;
+	size_t	entries_size;
+
+	pthread_rwlock_t rwlock;
+
+	mode_t	socket_mode;
+	int	force_unlink;
+	int	query_timeout;
+
+	int	threads_num;
+};
+
+enum config_entry_lock_type {
+	CELT_POSITIVE,
+	CELT_NEGATIVE,
+	CELT_MULTIPART
+};
+
+extern struct configuration *init_configuration(void);
+extern void destroy_configuration(struct configuration *);
+extern void fill_configuration_defaults(struct configuration *);
+
+extern int add_configuration_entry(struct configuration *,
+	struct configuration_entry *);
+extern struct configuration_entry *create_def_configuration_entry(
+	const char *);
+extern void destroy_configuration_entry(struct configuration_entry *);
+extern size_t configuration_get_entries_size(struct configuration *);
+extern struct configuration_entry *configuration_get_entry(
+	struct configuration *, size_t);
+extern struct configuration_entry *configuration_find_entry(
+	struct configuration *, const char *);
+
+extern int configuration_entry_add_mp_cache_entry(struct configuration_entry *,
+	cache_entry);
+extern cache_entry configuration_entry_find_mp_cache_entry(
+	struct configuration_entry *,
+	const char *);
+extern int configuration_entry_find_mp_cache_entries(
+	struct configuration_entry *, const char *, cache_entry **,
+	cache_entry **);
+
+extern void configuration_lock_rdlock(struct configuration *config);
+extern void configuration_lock_wrlock(struct configuration *config);
+extern void configuration_unlock(struct configuration *config);
+
+extern void configuration_lock_entry(struct configuration_entry *,
+	enum config_entry_lock_type);
+extern void configuration_unlock_entry(struct configuration_entry *,
+	enum config_entry_lock_type);
+
+#endif