log_method.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1999-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: log_method.c,v 11.32 2002/05/30 22:16:47 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #ifdef HAVE_RPC
- #include <rpc/rpc.h>
- #endif
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include "db_int.h"
- #include "dbinc/log.h"
- #ifdef HAVE_RPC
- #include "dbinc_auto/db_server.h"
- #include "dbinc_auto/rpc_client_ext.h"
- #endif
- static int __log_set_lg_bsize __P((DB_ENV *, u_int32_t));
- static int __log_set_lg_dir __P((DB_ENV *, const char *));
- static int __log_set_lg_max __P((DB_ENV *, u_int32_t));
- static int __log_set_lg_regionmax __P((DB_ENV *, u_int32_t));
- /*
- * __log_dbenv_create --
- * Log specific initialization of the DB_ENV structure.
- *
- * PUBLIC: void __log_dbenv_create __P((DB_ENV *));
- */
- void
- __log_dbenv_create(dbenv)
- DB_ENV *dbenv;
- {
- /*
- * !!!
- * Our caller has not yet had the opportunity to reset the panic
- * state or turn off mutex locking, and so we can neither check
- * the panic state or acquire a mutex in the DB_ENV create path.
- */
- dbenv->lg_bsize = LG_BSIZE_DEFAULT;
- dbenv->lg_regionmax = LG_BASE_REGION_SIZE;
- #ifdef HAVE_RPC
- /*
- * If we have a client, overwrite what we just setup to
- * point to client functions.
- */
- if (F_ISSET(dbenv, DB_ENV_RPCCLIENT)) {
- dbenv->set_lg_bsize = __dbcl_set_lg_bsize;
- dbenv->set_lg_dir = __dbcl_set_lg_dir;
- dbenv->set_lg_max = __dbcl_set_lg_max;
- dbenv->set_lg_regionmax = __dbcl_set_lg_regionmax;
- dbenv->log_archive = __dbcl_log_archive;
- dbenv->log_cursor = __dbcl_log_cursor;
- dbenv->log_file = __dbcl_log_file;
- dbenv->log_flush = __dbcl_log_flush;
- dbenv->log_put = __dbcl_log_put;
- dbenv->log_stat = __dbcl_log_stat;
- } else
- #endif
- {
- dbenv->set_lg_bsize = __log_set_lg_bsize;
- dbenv->set_lg_dir = __log_set_lg_dir;
- dbenv->set_lg_max = __log_set_lg_max;
- dbenv->set_lg_regionmax = __log_set_lg_regionmax;
- dbenv->log_archive = __log_archive;
- dbenv->log_cursor = __log_cursor;
- dbenv->log_file = __log_file;
- dbenv->log_flush = __log_flush;
- dbenv->log_put = __log_put;
- dbenv->log_stat = __log_stat;
- }
- }
- /*
- * __log_set_lg_bsize --
- * Set the log buffer size.
- */
- static int
- __log_set_lg_bsize(dbenv, lg_bsize)
- DB_ENV *dbenv;
- u_int32_t lg_bsize;
- {
- u_int32_t lg_max;
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lg_bsize");
- if (lg_bsize == 0)
- lg_bsize = LG_BSIZE_DEFAULT;
- /* Let's not be silly. */
- lg_max = dbenv->lg_size == 0 ? LG_MAX_DEFAULT : dbenv->lg_size;
- if (lg_bsize > lg_max / 4) {
- __db_err(dbenv, "log buffer size must be <= log file size / 4");
- return (EINVAL);
- }
- dbenv->lg_bsize = lg_bsize;
- return (0);
- }
- /*
- * __log_set_lg_max --
- * Set the maximum log file size.
- */
- static int
- __log_set_lg_max(dbenv, lg_max)
- DB_ENV *dbenv;
- u_int32_t lg_max;
- {
- LOG *region;
- if (lg_max == 0)
- lg_max = LG_MAX_DEFAULT;
- if (F_ISSET(dbenv, DB_ENV_OPEN_CALLED)) {
- if (!LOGGING_ON(dbenv))
- return (__db_env_config(
- dbenv, "set_lg_max", DB_INIT_LOG));
- region = ((DB_LOG *)dbenv->lg_handle)->reginfo.primary;
- /* Let's not be silly. */
- if (lg_max < region->buffer_size * 4)
- goto err;
- region->log_nsize = lg_max;
- } else {
- /* Let's not be silly. */
- if (lg_max < dbenv->lg_bsize * 4)
- goto err;
- dbenv->lg_size = lg_max;
- }
- return (0);
- err: __db_err(dbenv, "log file size must be >= log buffer size * 4");
- return (EINVAL);
- }
- /*
- * __log_set_lg_regionmax --
- * Set the region size.
- */
- static int
- __log_set_lg_regionmax(dbenv, lg_regionmax)
- DB_ENV *dbenv;
- u_int32_t lg_regionmax;
- {
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lg_regionmax");
- /* Let's not be silly. */
- if (lg_regionmax != 0 && lg_regionmax < LG_BASE_REGION_SIZE) {
- __db_err(dbenv,
- "log file size must be >= %d", LG_BASE_REGION_SIZE);
- return (EINVAL);
- }
- dbenv->lg_regionmax = lg_regionmax;
- return (0);
- }
- /*
- * __log_set_lg_dir --
- * Set the log file directory.
- */
- static int
- __log_set_lg_dir(dbenv, dir)
- DB_ENV *dbenv;
- const char *dir;
- {
- if (dbenv->db_log_dir != NULL)
- __os_free(dbenv, dbenv->db_log_dir);
- return (__os_strdup(dbenv, dir, &dbenv->db_log_dir));
- }