srv0start.c

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

	for (; *str; str++) {

		if (*str == '/') {
			*str = '\\';
		}
	}
#endif
}
	
/*************************************************************************
Adds a slash or a backslash to the end of a string if it is missing
and the string is not empty. */

char*
srv_add_path_separator_if_needed(
/*=============================*/
			/* out: string which has the separator if the
			string is not empty */
	char*	str)	/* in: null-terminated character string */
{
	char*	out_str;
	ulint	len	= ut_strlen(str);

	if (len == 0 || str[len - 1] == SRV_PATH_SEPARATOR) {

		return(str);
	}

	out_str = ut_malloc(len + 2);
	memcpy(out_str, str, len);
	out_str[len] = SRV_PATH_SEPARATOR;
	out_str[len + 1] = 0;

	return(out_str);
}

/*************************************************************************
Calculates the low 32 bits when a file size which is given as a number
database pages is converted to the number of bytes. */
static
ulint
srv_calc_low32(
/*===========*/
				/* out: low 32 bytes of file size when
				expressed in bytes */
	ulint	file_size)	/* in: file size in database pages */
{
	return(0xFFFFFFFFUL & (file_size << UNIV_PAGE_SIZE_SHIFT));
}

/*************************************************************************
Calculates the high 32 bits when a file size which is given as a number
database pages is converted to the number of bytes. */
static
ulint
srv_calc_high32(
/*============*/
				/* out: high 32 bytes of file size when
				expressed in bytes */
	ulint	file_size)	/* in: file size in database pages */
{
	return(file_size >> (32 - UNIV_PAGE_SIZE_SHIFT));
}

#ifndef UNIV_HOTBACKUP
/*************************************************************************
Creates or opens the log files and closes them. */
static
ulint
open_or_create_log_file(
/*====================*/
					/* out: DB_SUCCESS or error code */
        ibool   create_new_db,          /* in: TRUE if we should create a
                                        new database */
	ibool*	log_file_created,	/* out: TRUE if new log file
					created */
	ibool	log_file_has_been_opened,/* in: TRUE if a log file has been
					opened before: then it is an error
					to try to create another log file */
	ulint	k,			/* in: log group number */
	ulint	i)			/* in: log file number in group */
{
	ibool	ret;
	ulint	size;
	ulint	size_high;
	char	name[10000];

	UT_NOT_USED(create_new_db);

	*log_file_created = FALSE;

	srv_normalize_path_for_win(srv_log_group_home_dirs[k]);
	srv_log_group_home_dirs[k] = srv_add_path_separator_if_needed(
						srv_log_group_home_dirs[k]);

	ut_a(strlen(srv_log_group_home_dirs[k]) <
		(sizeof name) - 10 - sizeof "ib_logfile");
	sprintf(name, "%s%s%lu", srv_log_group_home_dirs[k], "ib_logfile", (ulong) i);

	files[i] = os_file_create(name, OS_FILE_CREATE, OS_FILE_NORMAL,
						OS_LOG_FILE, &ret);
	if (ret == FALSE) {
		if (os_file_get_last_error(FALSE) != OS_FILE_ALREADY_EXISTS
#ifdef UNIV_AIX
		   	/* AIX 5.1 after security patch ML7 may have errno set
			to 0 here, which causes our function to return 100;
			work around that AIX problem */
		   && os_file_get_last_error(FALSE) != 100
#endif
		) {
			fprintf(stderr,
			"InnoDB: Error in creating or opening %s\n", name);
				
			return(DB_ERROR);
		}

		files[i] = os_file_create(name, OS_FILE_OPEN, OS_FILE_AIO,
							OS_LOG_FILE, &ret);
		if (!ret) {
			fprintf(stderr,
			"InnoDB: Error in opening %s\n", name);
				
			return(DB_ERROR);
		}

		ret = os_file_get_size(files[i], &size, &size_high);
		ut_a(ret);
		
		if (size != srv_calc_low32(srv_log_file_size)
		    || size_high != srv_calc_high32(srv_log_file_size)) {
		    	
			fprintf(stderr,
"InnoDB: Error: log file %s is of different size %lu %lu bytes\n"
"InnoDB: than specified in the .cnf file %lu %lu bytes!\n",
				name, (ulong) size_high, (ulong) size,
				(ulong) srv_calc_high32(srv_log_file_size),
				(ulong) srv_calc_low32(srv_log_file_size));
				
			return(DB_ERROR);
		}					
	} else {
		*log_file_created = TRUE;

	    	ut_print_timestamp(stderr);

		fprintf(stderr,
		"  InnoDB: Log file %s did not exist: new to be created\n",
									name);
		if (log_file_has_been_opened) {

			return(DB_ERROR);
		}

		fprintf(stderr, "InnoDB: Setting log file %s size to %lu MB\n",
			             name, (ulong) srv_log_file_size
			>> (20 - UNIV_PAGE_SIZE_SHIFT));

		fprintf(stderr,
	    "InnoDB: Database physically writes the file full: wait...\n");

		ret = os_file_set_size(name, files[i],
					srv_calc_low32(srv_log_file_size),
					srv_calc_high32(srv_log_file_size));
		if (!ret) {
			fprintf(stderr,
		"InnoDB: Error in creating %s: probably out of disk space\n",
			name);

			return(DB_ERROR);
		}
	}

	ret = os_file_close(files[i]);
	ut_a(ret);

	if (i == 0) {
		/* Create in memory the file space object
		which is for this log group */
				
		fil_space_create(name,
		2 * k + SRV_LOG_SPACE_FIRST_ID, FIL_LOG);
	}

	ut_a(fil_validate());

	fil_node_create(name, srv_log_file_size,
				2 * k + SRV_LOG_SPACE_FIRST_ID, FALSE);
#ifdef UNIV_LOG_ARCHIVE
	/* If this is the first log group, create the file space object
	for archived logs.
	Under MySQL, no archiving ever done. */

	if (k == 0 && i == 0) {
		arch_space_id = 2 * k + 1 + SRV_LOG_SPACE_FIRST_ID;

	    	fil_space_create("arch_log_space", arch_space_id, FIL_LOG);
	} else {
		arch_space_id = ULINT_UNDEFINED;
	}
#endif /* UNIV_LOG_ARCHIVE */
	if (i == 0) {
		log_group_init(k, srv_n_log_files,
				srv_log_file_size * UNIV_PAGE_SIZE,
				2 * k + SRV_LOG_SPACE_FIRST_ID,
				SRV_LOG_SPACE_FIRST_ID + 1); /* dummy arch
								space id */
	}

	return(DB_SUCCESS);
}

/*************************************************************************
Creates or opens database data files and closes them. */
static
ulint
open_or_create_data_files(
/*======================*/
				/* out: DB_SUCCESS or error code */
	ibool*	create_new_db,	/* out: TRUE if new database should be
								created */
#ifdef UNIV_LOG_ARCHIVE
	ulint*	min_arch_log_no,/* out: min of archived log numbers in data
				files */
	ulint*	max_arch_log_no,/* out: */
#endif /* UNIV_LOG_ARCHIVE */
	dulint*	min_flushed_lsn,/* out: min of flushed lsn values in data
				files */
	dulint*	max_flushed_lsn,/* out: */
	ulint*	sum_of_new_sizes)/* out: sum of sizes of the new files added */
{
	ibool	ret;
	ulint	i;
	ibool	one_opened	= FALSE;
	ibool	one_created	= FALSE;
	ulint	size;
	ulint	size_high;
	ulint	rounded_size_pages;
	char	name[10000];

	if (srv_n_data_files >= 1000) {
		fprintf(stderr, "InnoDB: can only have < 1000 data files\n"
				"InnoDB: you have defined %lu\n",
				(ulong) srv_n_data_files);
		return(DB_ERROR);
	}

	*sum_of_new_sizes = 0;
	
	*create_new_db = FALSE;

	srv_normalize_path_for_win(srv_data_home);
	srv_data_home = srv_add_path_separator_if_needed(srv_data_home);

	for (i = 0; i < srv_n_data_files; i++) {
		srv_normalize_path_for_win(srv_data_file_names[i]);

		ut_a(strlen(srv_data_home) + strlen(srv_data_file_names[i])
			< (sizeof name) - 1);
		sprintf(name, "%s%s", srv_data_home, srv_data_file_names[i]);
	
		if (srv_data_file_is_raw_partition[i] == 0) {

			/* First we try to create the file: if it already
			exists, ret will get value FALSE */

			files[i] = os_file_create(name, OS_FILE_CREATE,
					OS_FILE_NORMAL, OS_DATA_FILE, &ret);

			if (ret == FALSE && os_file_get_last_error(FALSE) !=
						OS_FILE_ALREADY_EXISTS
#ifdef UNIV_AIX
		   		/* AIX 5.1 after security patch ML7 may have
				errno set to 0 here, which causes our function
				to return 100; work around that AIX problem */
		   	    && os_file_get_last_error(FALSE) != 100
#endif
			) {
				fprintf(stderr,
				"InnoDB: Error in creating or opening %s\n",
				name);

				return(DB_ERROR);
			}
		} else if (srv_data_file_is_raw_partition[i] == SRV_NEW_RAW) {
			/* The partition is opened, not created; then it is
			written over */

			srv_start_raw_disk_in_use = TRUE;
			srv_created_new_raw = TRUE;

			files[i] = os_file_create(
				name, OS_FILE_OPEN_RAW, OS_FILE_NORMAL,
							OS_DATA_FILE, &ret);
			if (!ret) {
				fprintf(stderr,
				"InnoDB: Error in opening %s\n", name);

				return(DB_ERROR);
			}
		} else if (srv_data_file_is_raw_partition[i] == SRV_OLD_RAW) {
			srv_start_raw_disk_in_use = TRUE;

			ret = FALSE;
		} else {
			ut_a(0);
		}

		if (ret == FALSE) {
			/* We open the data file */

			if (one_created) {
				fprintf(stderr,
	"InnoDB: Error: data files can only be added at the end\n");
				fprintf(stderr,
	"InnoDB: of a tablespace, but data file %s existed beforehand.\n",
				name);
				return(DB_ERROR);
			}
				
			if (srv_data_file_is_raw_partition[i] == SRV_OLD_RAW) {
				files[i] = os_file_create(
					name, OS_FILE_OPEN_RAW, OS_FILE_NORMAL,
							 OS_DATA_FILE, &ret);
			} else if (i == 0) {
				files[i] = os_file_create(
					name, OS_FILE_OPEN_RETRY,
							OS_FILE_NORMAL,
							OS_DATA_FILE, &ret);
			} else {
				files[i] = os_file_create(
					name, OS_FILE_OPEN, OS_FILE_NORMAL,
							 OS_DATA_FILE, &ret);
			}

			if (!ret) {
				fprintf(stderr,
				"InnoDB: Error in opening %s\n", name);
				os_file_get_last_error(TRUE);

				return(DB_ERROR);
			}

			if (srv_data_file_is_raw_partition[i] == SRV_OLD_RAW) {

				goto skip_size_check;
			}

			ret = os_file_get_size(files[i], &size, &size_high);
			ut_a(ret);
			/* Round size downward to megabytes */
		
			rounded_size_pages = (size / (1024 * 1024)
							+ 4096 * size_high)
					     << (20 - UNIV_PAGE_SIZE_SHIFT);

			if (i == srv_n_data_files - 1
				    && srv_auto_extend_last_data_file) {

				if (srv_data_file_sizes[i] >
				    		rounded_size_pages
				    	   || (srv_last_file_size_max > 0
				    	      && srv_last_file_size_max <
				    	       rounded_size_pages)) {
				    	       	
					fprintf(stderr,
"InnoDB: Error: auto-extending data file %s is of a different size\n"
"InnoDB: %lu pages (rounded down to MB) than specified in the .cnf file:\n"
"InnoDB: initial %lu pages, max %lu (relevant if non-zero) pages!\n",
		  name, (ulong) rounded_size_pages,
		  (ulong) srv_data_file_sizes[i],
		  (ulong) srv_last_file_size_max);

					return(DB_ERROR);
				}
				    	     
				srv_data_file_sizes[i] = rounded_size_pages;
			}
				
			if (rounded_size_pages != srv_data_file_sizes[i]) {

				fprintf(stderr,
"InnoDB: Error: data file %s is of a different size\n"
"InnoDB: %lu pages (rounded down to MB)\n"
"InnoDB: than specified in the .cnf file %lu pages!\n", name,
					       (ulong) rounded_size_pages,
					       (ulong) srv_data_file_sizes[i]);
				
				return(DB_ERROR);
			}
skip_size_check:
			fil_read_flushed_lsn_and_arch_log_no(files[i],
					one_opened,
#ifdef UNIV_LOG_ARCHIVE
					min_arch_log_no, max_arch_log_no,
#endif /* UNIV_LOG_ARCHIVE */
					min_flushed_lsn, max_flushed_lsn);
			one_opened = TRUE;
		} else {
		        /* We created the data file and now write it full of
			zeros */

			one_created = TRUE;

			if (i > 0) {
	    			ut_print_timestamp(stderr);
				fprintf(stderr, 
		"  InnoDB: Data file %s did not exist: new to be created\n",
									name);
			} else {
				fprintf(stderr, 
 		"InnoDB: The first specified data file %s did not exist:\n"
		"InnoDB: a new database to be created!\n", name);
				*create_new_db = TRUE;
			}
			
	    		ut_print_timestamp(stderr);
			fprintf(stderr, 
				"  InnoDB: Setting file %s size to %lu MB\n",
			       name, (ulong) (srv_data_file_sizes[i]
				      >> (20 - UNIV_PAGE_SIZE_SHIFT)));

			fprintf(stderr,
	"InnoDB: Database physically writes the file full: wait...\n");

			ret = os_file_set_size(name, files[i],
				srv_calc_low32(srv_data_file_sizes[i]),
				srv_calc_high32(srv_data_file_sizes[i]));

			if (!ret) {
				fprintf(stderr, 
	"InnoDB: Error in creating %s: probably out of disk space\n", name);

				return(DB_ERROR);
			}

			*sum_of_new_sizes = *sum_of_new_sizes
						+ srv_data_file_sizes[i];
		}

		ret = os_file_close(files[i]);
		ut_a(ret);

		if (i == 0) {
			fil_space_create(name, 0, FIL_TABLESPACE);
		}

		ut_a(fil_validate());

		if (srv_data_file_is_raw_partition[i]) {

		        fil_node_create(name, srv_data_file_sizes[i], 0, TRUE);
		} else {
		        fil_node_create(name, srv_data_file_sizes[i], 0,
									FALSE);
		}
	}

	ios = 0;

	mutex_create(&ios_mutex);
	mutex_set_level(&ios_mutex, SYNC_NO_ORDER_CHECK);

	return(DB_SUCCESS);
}

/********************************************************************
Starts InnoDB and creates a new database if database files
are not found and the user wants. Server parameters are
read from a file of name "srv_init" in the ib_home directory. */

int
innobase_start_or_create_for_mysql(void)
/*====================================*/
				/* out: DB_SUCCESS or error code */
{
	buf_pool_t*	ret;
	ibool	create_new_db;
	ibool	log_file_created;
	ibool	log_created	= FALSE;
	ibool	log_opened	= FALSE;
	dulint	min_flushed_lsn;
	dulint	max_flushed_lsn;