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799 lines
30 KiB
/*****************************************************************************
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Copyright (c) 1995, 2013, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/fil0fil.h
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The low-level file system
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Created 10/25/1995 Heikki Tuuri
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*******************************************************/
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#ifndef fil0fil_h
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#define fil0fil_h
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#include "univ.i"
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#include "dict0types.h"
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#include "ut0byte.h"
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#include "os0file.h"
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#ifndef UNIV_HOTBACKUP
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#include "sync0rw.h"
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#include "ibuf0types.h"
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#endif /* !UNIV_HOTBACKUP */
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#include "trx0types.h"
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/** When mysqld is run, the default directory "." is the mysqld datadir,
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but in the MySQL Embedded Server Library and ibbackup it is not the default
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directory, and we must set the base file path explicitly */
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extern const char* fil_path_to_mysql_datadir;
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/** Initial size of a single-table tablespace in pages */
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#define FIL_IBD_FILE_INITIAL_SIZE 4
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/** 'null' (undefined) page offset in the context of file spaces */
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#define FIL_NULL ULINT32_UNDEFINED
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/* Space address data type; this is intended to be used when
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addresses accurate to a byte are stored in file pages. If the page part
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of the address is FIL_NULL, the address is considered undefined. */
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typedef byte fil_faddr_t; /*!< 'type' definition in C: an address
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stored in a file page is a string of bytes */
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#define FIL_ADDR_PAGE 0 /* first in address is the page offset */
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#define FIL_ADDR_BYTE 4 /* then comes 2-byte byte offset within page*/
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#define FIL_ADDR_SIZE 6 /* address size is 6 bytes */
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/** A struct for storing a space address FIL_ADDR, when it is used
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in C program data structures. */
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typedef struct fil_addr_struct fil_addr_t;
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/** File space address */
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struct fil_addr_struct{
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ulint page; /*!< page number within a space */
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ulint boffset; /*!< byte offset within the page */
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};
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/** The null file address */
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extern fil_addr_t fil_addr_null;
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/** The byte offsets on a file page for various variables @{ */
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#define FIL_PAGE_SPACE_OR_CHKSUM 0 /*!< in < MySQL-4.0.14 space id the
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page belongs to (== 0) but in later
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versions the 'new' checksum of the
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page */
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#define FIL_PAGE_OFFSET 4 /*!< page offset inside space */
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#define FIL_PAGE_PREV 8 /*!< if there is a 'natural'
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predecessor of the page, its
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offset. Otherwise FIL_NULL.
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This field is not set on BLOB
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pages, which are stored as a
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singly-linked list. See also
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FIL_PAGE_NEXT. */
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#define FIL_PAGE_NEXT 12 /*!< if there is a 'natural' successor
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of the page, its offset.
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Otherwise FIL_NULL.
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B-tree index pages
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(FIL_PAGE_TYPE contains FIL_PAGE_INDEX)
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on the same PAGE_LEVEL are maintained
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as a doubly linked list via
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FIL_PAGE_PREV and FIL_PAGE_NEXT
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in the collation order of the
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smallest user record on each page. */
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#define FIL_PAGE_LSN 16 /*!< lsn of the end of the newest
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modification log record to the page */
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#define FIL_PAGE_TYPE 24 /*!< file page type: FIL_PAGE_INDEX,...,
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2 bytes.
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The contents of this field can only
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be trusted in the following case:
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if the page is an uncompressed
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B-tree index page, then it is
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guaranteed that the value is
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FIL_PAGE_INDEX.
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The opposite does not hold.
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In tablespaces created by
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MySQL/InnoDB 5.1.7 or later, the
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contents of this field is valid
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for all uncompressed pages. */
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#define FIL_PAGE_FILE_FLUSH_LSN 26 /*!< this is only defined for the
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first page in a system tablespace
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data file (ibdata*, not *.ibd):
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the file has been flushed to disk
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at least up to this lsn */
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#define FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID 34 /*!< starting from 4.1.x this
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contains the space id of the page */
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#define FIL_PAGE_DATA 38 /*!< start of the data on the page */
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#define FIL_PAGE_DATA_ALIGN_32 40
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/* @} */
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/** File page trailer @{ */
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#define FIL_PAGE_END_LSN_OLD_CHKSUM 8 /*!< the low 4 bytes of this are used
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to store the page checksum, the
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last 4 bytes should be identical
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to the last 4 bytes of FIL_PAGE_LSN */
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#define FIL_PAGE_DATA_END 8 /*!< size of the page trailer */
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/* @} */
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/** File page types (values of FIL_PAGE_TYPE) @{ */
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#define FIL_PAGE_INDEX 17855 /*!< B-tree node */
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#define FIL_PAGE_UNDO_LOG 2 /*!< Undo log page */
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#define FIL_PAGE_INODE 3 /*!< Index node */
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#define FIL_PAGE_IBUF_FREE_LIST 4 /*!< Insert buffer free list */
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/* File page types introduced in MySQL/InnoDB 5.1.7 */
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#define FIL_PAGE_TYPE_ALLOCATED 0 /*!< Freshly allocated page */
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#define FIL_PAGE_IBUF_BITMAP 5 /*!< Insert buffer bitmap */
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#define FIL_PAGE_TYPE_SYS 6 /*!< System page */
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#define FIL_PAGE_TYPE_TRX_SYS 7 /*!< Transaction system data */
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#define FIL_PAGE_TYPE_FSP_HDR 8 /*!< File space header */
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#define FIL_PAGE_TYPE_XDES 9 /*!< Extent descriptor page */
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#define FIL_PAGE_TYPE_BLOB 10 /*!< Uncompressed BLOB page */
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#define FIL_PAGE_TYPE_ZBLOB 11 /*!< First compressed BLOB page */
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#define FIL_PAGE_TYPE_ZBLOB2 12 /*!< Subsequent compressed BLOB page */
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#define FIL_PAGE_TYPE_LAST FIL_PAGE_TYPE_ZBLOB2
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/*!< Last page type */
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/* @} */
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/** Space types @{ */
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#define FIL_TABLESPACE 501 /*!< tablespace */
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#define FIL_LOG 502 /*!< redo log */
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/* @} */
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/** The number of fsyncs done to the log */
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extern ulint fil_n_log_flushes;
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/** Number of pending redo log flushes */
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extern ulint fil_n_pending_log_flushes;
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/** Number of pending tablespace flushes */
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extern ulint fil_n_pending_tablespace_flushes;
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#ifndef UNIV_HOTBACKUP
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/*******************************************************************//**
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Returns the version number of a tablespace, -1 if not found.
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@return version number, -1 if the tablespace does not exist in the
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memory cache */
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UNIV_INTERN
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ib_int64_t
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fil_space_get_version(
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/*==================*/
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ulint id); /*!< in: space id */
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/*******************************************************************//**
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Returns the latch of a file space.
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@return latch protecting storage allocation */
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UNIV_INTERN
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rw_lock_t*
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fil_space_get_latch(
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/*================*/
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ulint id, /*!< in: space id */
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ulint* zip_size);/*!< out: compressed page size, or
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0 for uncompressed tablespaces */
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/*******************************************************************//**
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Returns the type of a file space.
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@return FIL_TABLESPACE or FIL_LOG */
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UNIV_INTERN
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ulint
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fil_space_get_type(
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/*===============*/
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ulint id); /*!< in: space id */
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#endif /* !UNIV_HOTBACKUP */
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/*******************************************************************//**
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Appends a new file to the chain of files of a space. File must be closed. */
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UNIV_INTERN
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void
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fil_node_create(
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/*============*/
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const char* name, /*!< in: file name (file must be closed) */
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ulint size, /*!< in: file size in database blocks, rounded
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downwards to an integer */
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ulint id, /*!< in: space id where to append */
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ibool is_raw);/*!< in: TRUE if a raw device or
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a raw disk partition */
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#ifdef UNIV_LOG_ARCHIVE
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/****************************************************************//**
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Drops files from the start of a file space, so that its size is cut by
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the amount given. */
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UNIV_INTERN
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void
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fil_space_truncate_start(
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/*=====================*/
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ulint id, /*!< in: space id */
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ulint trunc_len); /*!< in: truncate by this much; it is an error
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if this does not equal to the combined size of
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some initial files in the space */
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#endif /* UNIV_LOG_ARCHIVE */
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/*******************************************************************//**
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Creates a space memory object and puts it to the 'fil system' hash table. If
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there is an error, prints an error message to the .err log.
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@return TRUE if success */
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UNIV_INTERN
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ibool
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fil_space_create(
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/*=============*/
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const char* name, /*!< in: space name */
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ulint id, /*!< in: space id */
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ulint zip_size,/*!< in: compressed page size, or
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0 for uncompressed tablespaces */
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ulint purpose);/*!< in: FIL_TABLESPACE, or FIL_LOG if log */
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/*******************************************************************//**
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Assigns a new space id for a new single-table tablespace. This works simply by
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incrementing the global counter. If 4 billion id's is not enough, we may need
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to recycle id's.
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@return TRUE if assigned, FALSE if not */
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UNIV_INTERN
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ibool
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fil_assign_new_space_id(
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/*====================*/
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ulint* space_id); /*!< in/out: space id */
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/*******************************************************************//**
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Returns the size of the space in pages. The tablespace must be cached in the
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memory cache.
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@return space size, 0 if space not found */
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UNIV_INTERN
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ulint
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fil_space_get_size(
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/*===============*/
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ulint id); /*!< in: space id */
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/*******************************************************************//**
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Returns the flags of the space. The tablespace must be cached
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in the memory cache.
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@return flags, ULINT_UNDEFINED if space not found */
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UNIV_INTERN
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ulint
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fil_space_get_flags(
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/*================*/
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|
ulint id); /*!< in: space id */
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/*******************************************************************//**
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Returns the compressed page size of the space, or 0 if the space
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is not compressed. The tablespace must be cached in the memory cache.
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@return compressed page size, ULINT_UNDEFINED if space not found */
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UNIV_INTERN
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ulint
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fil_space_get_zip_size(
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/*===================*/
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ulint id); /*!< in: space id */
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/*******************************************************************//**
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Checks if the pair space, page_no refers to an existing page in a tablespace
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file space. The tablespace must be cached in the memory cache.
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@return TRUE if the address is meaningful */
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UNIV_INTERN
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ibool
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fil_check_adress_in_tablespace(
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/*===========================*/
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ulint id, /*!< in: space id */
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ulint page_no);/*!< in: page number */
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/****************************************************************//**
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Initializes the tablespace memory cache. */
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UNIV_INTERN
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void
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fil_init(
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/*=====*/
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ulint hash_size, /*!< in: hash table size */
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ulint max_n_open); /*!< in: max number of open files */
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/*******************************************************************//**
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Initializes the tablespace memory cache. */
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UNIV_INTERN
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void
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fil_close(void);
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/*===========*/
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/*******************************************************************//**
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Opens all log files and system tablespace data files. They stay open until the
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database server shutdown. This should be called at a server startup after the
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space objects for the log and the system tablespace have been created. The
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purpose of this operation is to make sure we never run out of file descriptors
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if we need to read from the insert buffer or to write to the log. */
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UNIV_INTERN
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void
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fil_open_log_and_system_tablespace_files(void);
|
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/*==========================================*/
|
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/*******************************************************************//**
|
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Closes all open files. There must not be any pending i/o's or not flushed
|
|
modifications in the files. */
|
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UNIV_INTERN
|
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void
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fil_close_all_files(void);
|
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/*=====================*/
|
|
/*******************************************************************//**
|
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Sets the max tablespace id counter if the given number is bigger than the
|
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previous value. */
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UNIV_INTERN
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void
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fil_set_max_space_id_if_bigger(
|
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/*===========================*/
|
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ulint max_id);/*!< in: maximum known id */
|
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#ifndef UNIV_HOTBACKUP
|
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/****************************************************************//**
|
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Writes the flushed lsn and the latest archived log number to the page
|
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header of the first page of each data file in the system tablespace.
|
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@return DB_SUCCESS or error number */
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UNIV_INTERN
|
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ulint
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fil_write_flushed_lsn_to_data_files(
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/*================================*/
|
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ib_uint64_t lsn, /*!< in: lsn to write */
|
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ulint arch_log_no); /*!< in: latest archived log
|
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file number */
|
|
/*******************************************************************//**
|
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Reads the flushed lsn, arch no, and tablespace flag fields from a data
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file at database startup.
|
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@retval NULL on success, or if innodb_force_recovery is set
|
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@return pointer to an error message string */
|
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UNIV_INTERN
|
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const char*
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fil_read_first_page(
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/*================*/
|
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os_file_t data_file, /*!< in: open data file */
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ibool one_read_already, /*!< in: TRUE if min and max
|
|
parameters below already
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contain sensible data */
|
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ulint* flags, /*!< out: tablespace flags */
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#ifdef UNIV_LOG_ARCHIVE
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ulint* min_arch_log_no, /*!< out: min of archived
|
|
log numbers in data files */
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|
ulint* max_arch_log_no, /*!< out: max of archived
|
|
log numbers in data files */
|
|
#endif /* UNIV_LOG_ARCHIVE */
|
|
ib_uint64_t* min_flushed_lsn, /*!< out: min of flushed
|
|
lsn values in data files */
|
|
ib_uint64_t* max_flushed_lsn) /*!< out: max of flushed
|
|
lsn values in data files */
|
|
__attribute__((warn_unused_result));
|
|
/*******************************************************************//**
|
|
Increments the count of pending operation, if space is not being deleted.
|
|
@return TRUE if being deleted, and operation should be skipped */
|
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UNIV_INTERN
|
|
ibool
|
|
fil_inc_pending_ops(
|
|
/*================*/
|
|
ulint id); /*!< in: space id */
|
|
/*******************************************************************//**
|
|
Decrements the count of pending operations. */
|
|
UNIV_INTERN
|
|
void
|
|
fil_decr_pending_ops(
|
|
/*=================*/
|
|
ulint id); /*!< in: space id */
|
|
#endif /* !UNIV_HOTBACKUP */
|
|
/*******************************************************************//**
|
|
Parses the body of a log record written about an .ibd file operation. That is,
|
|
the log record part after the standard (type, space id, page no) header of the
|
|
log record.
|
|
|
|
If desired, also replays the delete or rename operation if the .ibd file
|
|
exists and the space id in it matches. Replays the create operation if a file
|
|
at that path does not exist yet. If the database directory for the file to be
|
|
created does not exist, then we create the directory, too.
|
|
|
|
Note that ibbackup --apply-log sets fil_path_to_mysql_datadir to point to the
|
|
datadir that we should use in replaying the file operations.
|
|
@return end of log record, or NULL if the record was not completely
|
|
contained between ptr and end_ptr */
|
|
UNIV_INTERN
|
|
byte*
|
|
fil_op_log_parse_or_replay(
|
|
/*=======================*/
|
|
byte* ptr, /*!< in: buffer containing the log record body,
|
|
or an initial segment of it, if the record does
|
|
not fir completely between ptr and end_ptr */
|
|
byte* end_ptr, /*!< in: buffer end */
|
|
ulint type, /*!< in: the type of this log record */
|
|
ulint space_id, /*!< in: the space id of the tablespace in
|
|
question, or 0 if the log record should
|
|
only be parsed but not replayed */
|
|
ulint log_flags); /*!< in: redo log flags
|
|
(stored in the page number parameter) */
|
|
/*******************************************************************//**
|
|
Deletes a single-table tablespace. The tablespace must be cached in the
|
|
memory cache.
|
|
@return TRUE if success */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_delete_tablespace(
|
|
/*==================*/
|
|
ulint id, /*!< in: space id */
|
|
ibool evict_all); /*!< in: TRUE if we want all pages
|
|
evicted from LRU. */
|
|
#ifndef UNIV_HOTBACKUP
|
|
/*******************************************************************//**
|
|
Discards a single-table tablespace. The tablespace must be cached in the
|
|
memory cache. Discarding is like deleting a tablespace, but
|
|
1) we do not drop the table from the data dictionary;
|
|
2) we remove all insert buffer entries for the tablespace immediately; in DROP
|
|
TABLE they are only removed gradually in the background;
|
|
3) when the user does IMPORT TABLESPACE, the tablespace will have the same id
|
|
as it originally had.
|
|
@return TRUE if success */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_discard_tablespace(
|
|
/*===================*/
|
|
ulint id); /*!< in: space id */
|
|
#endif /* !UNIV_HOTBACKUP */
|
|
/*******************************************************************//**
|
|
Renames a single-table tablespace. The tablespace must be cached in the
|
|
tablespace memory cache.
|
|
@return TRUE if success */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_rename_tablespace(
|
|
/*==================*/
|
|
const char* old_name, /*!< in: old table name in the standard
|
|
databasename/tablename format of
|
|
InnoDB, or NULL if we do the rename
|
|
based on the space id only */
|
|
ulint id, /*!< in: space id */
|
|
const char* new_name); /*!< in: new table name in the standard
|
|
databasename/tablename format
|
|
of InnoDB */
|
|
|
|
/*******************************************************************//**
|
|
Creates a new single-table tablespace to a database directory of MySQL.
|
|
Database directories are under the 'datadir' of MySQL. The datadir is the
|
|
directory of a running mysqld program. We can refer to it by simply the
|
|
path '.'. Tables created with CREATE TEMPORARY TABLE we place in the temp
|
|
dir of the mysqld server.
|
|
@return DB_SUCCESS or error code */
|
|
UNIV_INTERN
|
|
ulint
|
|
fil_create_new_single_table_tablespace(
|
|
/*===================================*/
|
|
ulint space_id, /*!< in: space id */
|
|
const char* tablename, /*!< in: the table name in the usual
|
|
databasename/tablename format
|
|
of InnoDB, or a dir path to a temp
|
|
table */
|
|
ibool is_temp, /*!< in: TRUE if a table created with
|
|
CREATE TEMPORARY TABLE */
|
|
ulint flags, /*!< in: tablespace flags */
|
|
ulint size); /*!< in: the initial size of the
|
|
tablespace file in pages,
|
|
must be >= FIL_IBD_FILE_INITIAL_SIZE */
|
|
#ifndef UNIV_HOTBACKUP
|
|
/********************************************************************//**
|
|
Tries to open a single-table tablespace and optionally checks the space id is
|
|
right in it. If does not succeed, prints an error message to the .err log. This
|
|
function is used to open a tablespace when we start up mysqld, and also in
|
|
IMPORT TABLESPACE.
|
|
NOTE that we assume this operation is used either at the database startup
|
|
or under the protection of the dictionary mutex, so that two users cannot
|
|
race here. This operation does not leave the file associated with the
|
|
tablespace open, but closes it after we have looked at the space id in it.
|
|
@return TRUE if success */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_open_single_table_tablespace(
|
|
/*=============================*/
|
|
ibool check_space_id, /*!< in: should we check that the space
|
|
id in the file is right; we assume
|
|
that this function runs much faster
|
|
if no check is made, since accessing
|
|
the file inode probably is much
|
|
faster (the OS caches them) than
|
|
accessing the first page of the file */
|
|
ulint id, /*!< in: space id */
|
|
ulint flags, /*!< in: tablespace flags */
|
|
const char* name, /*!< in: table name in the
|
|
databasename/tablename format */
|
|
trx_t* trx); /*!< in: transaction. This is only used
|
|
for IMPORT TABLESPACE, must be NULL
|
|
otherwise */
|
|
/********************************************************************//**
|
|
It is possible, though very improbable, that the lsn's in the tablespace to be
|
|
imported have risen above the current system lsn, if a lengthy purge, ibuf
|
|
merge, or rollback was performed on a backup taken with ibbackup. If that is
|
|
the case, reset page lsn's in the file. We assume that mysqld was shut down
|
|
after it performed these cleanup operations on the .ibd file, so that it at
|
|
the shutdown stamped the latest lsn to the FIL_PAGE_FILE_FLUSH_LSN in the
|
|
first page of the .ibd file, and we can determine whether we need to reset the
|
|
lsn's just by looking at that flush lsn.
|
|
@return TRUE if success */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_reset_too_high_lsns(
|
|
/*====================*/
|
|
const char* name, /*!< in: table name in the
|
|
databasename/tablename format */
|
|
ib_uint64_t current_lsn); /*!< in: reset lsn's if the lsn stamped
|
|
to FIL_PAGE_FILE_FLUSH_LSN in the
|
|
first page is too high */
|
|
#endif /* !UNIV_HOTBACKUP */
|
|
/********************************************************************//**
|
|
At the server startup, if we need crash recovery, scans the database
|
|
directories under the MySQL datadir, looking for .ibd files. Those files are
|
|
single-table tablespaces. We need to know the space id in each of them so that
|
|
we know into which file we should look to check the contents of a page stored
|
|
in the doublewrite buffer, also to know where to apply log records where the
|
|
space id is != 0.
|
|
@return DB_SUCCESS or error number */
|
|
UNIV_INTERN
|
|
ulint
|
|
fil_load_single_table_tablespaces(void);
|
|
/*===================================*/
|
|
/*******************************************************************//**
|
|
Returns TRUE if a single-table tablespace does not exist in the memory cache,
|
|
or is being deleted there.
|
|
@return TRUE if does not exist or is being\ deleted */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_tablespace_deleted_or_being_deleted_in_mem(
|
|
/*===========================================*/
|
|
ulint id, /*!< in: space id */
|
|
ib_int64_t version);/*!< in: tablespace_version should be this; if
|
|
you pass -1 as the value of this, then this
|
|
parameter is ignored */
|
|
/*******************************************************************//**
|
|
Returns TRUE if a single-table tablespace exists in the memory cache.
|
|
@return TRUE if exists */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_tablespace_exists_in_mem(
|
|
/*=========================*/
|
|
ulint id); /*!< in: space id */
|
|
#ifndef UNIV_HOTBACKUP
|
|
/*******************************************************************//**
|
|
Returns TRUE if a matching tablespace exists in the InnoDB tablespace memory
|
|
cache. Note that if we have not done a crash recovery at the database startup,
|
|
there may be many tablespaces which are not yet in the memory cache.
|
|
@return TRUE if a matching tablespace exists in the memory cache */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_space_for_table_exists_in_mem(
|
|
/*==============================*/
|
|
ulint id, /*!< in: space id */
|
|
const char* name, /*!< in: table name in the standard
|
|
'databasename/tablename' format or
|
|
the dir path to a temp table */
|
|
ibool is_temp, /*!< in: TRUE if created with CREATE
|
|
TEMPORARY TABLE */
|
|
ibool mark_space, /*!< in: in crash recovery, at database
|
|
startup we mark all spaces which have
|
|
an associated table in the InnoDB
|
|
data dictionary, so that
|
|
we can print a warning about orphaned
|
|
tablespaces */
|
|
ibool print_error_if_does_not_exist);
|
|
/*!< in: print detailed error
|
|
information to the .err log if a
|
|
matching tablespace is not found from
|
|
memory */
|
|
#else /* !UNIV_HOTBACKUP */
|
|
/********************************************************************//**
|
|
Extends all tablespaces to the size stored in the space header. During the
|
|
ibbackup --apply-log phase we extended the spaces on-demand so that log records
|
|
could be appllied, but that may have left spaces still too small compared to
|
|
the size stored in the space header. */
|
|
UNIV_INTERN
|
|
void
|
|
fil_extend_tablespaces_to_stored_len(void);
|
|
/*======================================*/
|
|
#endif /* !UNIV_HOTBACKUP */
|
|
/**********************************************************************//**
|
|
Tries to extend a data file so that it would accommodate the number of pages
|
|
given. The tablespace must be cached in the memory cache. If the space is big
|
|
enough already, does nothing.
|
|
@return TRUE if success */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_extend_space_to_desired_size(
|
|
/*=============================*/
|
|
ulint* actual_size, /*!< out: size of the space after extension;
|
|
if we ran out of disk space this may be lower
|
|
than the desired size */
|
|
ulint space_id, /*!< in: space id */
|
|
ulint size_after_extend);/*!< in: desired size in pages after the
|
|
extension; if the current space size is bigger
|
|
than this already, the function does nothing */
|
|
/*******************************************************************//**
|
|
Tries to reserve free extents in a file space.
|
|
@return TRUE if succeed */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_space_reserve_free_extents(
|
|
/*===========================*/
|
|
ulint id, /*!< in: space id */
|
|
ulint n_free_now, /*!< in: number of free extents now */
|
|
ulint n_to_reserve); /*!< in: how many one wants to reserve */
|
|
/*******************************************************************//**
|
|
Releases free extents in a file space. */
|
|
UNIV_INTERN
|
|
void
|
|
fil_space_release_free_extents(
|
|
/*===========================*/
|
|
ulint id, /*!< in: space id */
|
|
ulint n_reserved); /*!< in: how many one reserved */
|
|
/*******************************************************************//**
|
|
Gets the number of reserved extents. If the database is silent, this number
|
|
should be zero. */
|
|
UNIV_INTERN
|
|
ulint
|
|
fil_space_get_n_reserved_extents(
|
|
/*=============================*/
|
|
ulint id); /*!< in: space id */
|
|
/********************************************************************//**
|
|
Reads or writes data. This operation is asynchronous (aio).
|
|
@return DB_SUCCESS, or DB_TABLESPACE_DELETED if we are trying to do
|
|
i/o on a tablespace which does not exist */
|
|
#define fil_io(type, sync, space_id, zip_size, block_offset, byte_offset, len, buf, message) \
|
|
_fil_io(type, sync, space_id, zip_size, block_offset, byte_offset, len, buf, message, NULL)
|
|
|
|
UNIV_INTERN
|
|
ulint
|
|
_fil_io(
|
|
/*===*/
|
|
ulint type, /*!< in: OS_FILE_READ or OS_FILE_WRITE,
|
|
ORed to OS_FILE_LOG, if a log i/o
|
|
and ORed to OS_AIO_SIMULATED_WAKE_LATER
|
|
if simulated aio and we want to post a
|
|
batch of i/os; NOTE that a simulated batch
|
|
may introduce hidden chances of deadlocks,
|
|
because i/os are not actually handled until
|
|
all have been posted: use with great
|
|
caution! */
|
|
ibool sync, /*!< in: TRUE if synchronous aio is desired */
|
|
ulint space_id, /*!< in: space id */
|
|
ulint zip_size, /*!< in: compressed page size in bytes;
|
|
0 for uncompressed pages */
|
|
ulint block_offset, /*!< in: offset in number of blocks */
|
|
ulint byte_offset, /*!< in: remainder of offset in bytes; in
|
|
aio this must be divisible by the OS block
|
|
size */
|
|
ulint len, /*!< in: how many bytes to read or write; this
|
|
must not cross a file boundary; in aio this
|
|
must be a block size multiple */
|
|
void* buf, /*!< in/out: buffer where to store read data
|
|
or from where to write; in aio this must be
|
|
appropriately aligned */
|
|
void* message, /*!< in: message for aio handler if non-sync
|
|
aio used, else ignored */
|
|
trx_t* trx);
|
|
/********************************************************************//**
|
|
Confirm whether the parameters are valid or not */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_is_exist(
|
|
/*==============*/
|
|
ulint space_id, /*!< in: space id */
|
|
ulint block_offset); /*!< in: offset in number of blocks */
|
|
/**********************************************************************//**
|
|
Waits for an aio operation to complete. This function is used to write the
|
|
handler for completed requests. The aio array of pending requests is divided
|
|
into segments (see os0file.c for more info). The thread specifies which
|
|
segment it wants to wait for. */
|
|
UNIV_INTERN
|
|
void
|
|
fil_aio_wait(
|
|
/*=========*/
|
|
ulint segment); /*!< in: the number of the segment in the aio
|
|
array to wait for */
|
|
/**********************************************************************//**
|
|
Flushes to disk possible writes cached by the OS. If the space does not exist
|
|
or is being dropped, does not do anything. */
|
|
UNIV_INTERN
|
|
void
|
|
fil_flush(
|
|
/*======*/
|
|
ulint space_id, /*!< in: file space id (this can be a group of
|
|
log files or a tablespace of the database) */
|
|
ibool metadata);
|
|
/**********************************************************************//**
|
|
Flushes to disk writes in file spaces of the given type possibly cached by
|
|
the OS. */
|
|
UNIV_INTERN
|
|
void
|
|
fil_flush_file_spaces(
|
|
/*==================*/
|
|
ulint purpose); /*!< in: FIL_TABLESPACE, FIL_LOG */
|
|
/******************************************************************//**
|
|
Checks the consistency of the tablespace cache.
|
|
@return TRUE if ok */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_validate(void);
|
|
/*==============*/
|
|
/********************************************************************//**
|
|
Returns TRUE if file address is undefined.
|
|
@return TRUE if undefined */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_addr_is_null(
|
|
/*=============*/
|
|
fil_addr_t addr); /*!< in: address */
|
|
/********************************************************************//**
|
|
Get the predecessor of a file page.
|
|
@return FIL_PAGE_PREV */
|
|
UNIV_INTERN
|
|
ulint
|
|
fil_page_get_prev(
|
|
/*==============*/
|
|
const byte* page); /*!< in: file page */
|
|
/********************************************************************//**
|
|
Get the successor of a file page.
|
|
@return FIL_PAGE_NEXT */
|
|
UNIV_INTERN
|
|
ulint
|
|
fil_page_get_next(
|
|
/*==============*/
|
|
const byte* page); /*!< in: file page */
|
|
/*********************************************************************//**
|
|
Sets the file page type. */
|
|
UNIV_INTERN
|
|
void
|
|
fil_page_set_type(
|
|
/*==============*/
|
|
byte* page, /*!< in/out: file page */
|
|
ulint type); /*!< in: type */
|
|
/*********************************************************************//**
|
|
Gets the file page type.
|
|
@return type; NOTE that if the type has not been written to page, the
|
|
return value not defined */
|
|
UNIV_INTERN
|
|
ulint
|
|
fil_page_get_type(
|
|
/*==============*/
|
|
const byte* page); /*!< in: file page */
|
|
|
|
/*******************************************************************//**
|
|
Returns TRUE if a single-table tablespace is being deleted.
|
|
@return TRUE if being deleted */
|
|
UNIV_INTERN
|
|
ibool
|
|
fil_tablespace_is_being_deleted(
|
|
/*============================*/
|
|
ulint id); /*!< in: space id */
|
|
|
|
/*************************************************************************
|
|
Return local hash table informations. */
|
|
|
|
ulint
|
|
fil_system_hash_cells(void);
|
|
/*========================*/
|
|
|
|
ulint
|
|
fil_system_hash_nodes(void);
|
|
/*========================*/
|
|
|
|
/*************************************************************************
|
|
functions to access is_corrupt flag of fil_space_t*/
|
|
|
|
ibool
|
|
fil_space_is_corrupt(
|
|
/*=================*/
|
|
ulint space_id);
|
|
|
|
void
|
|
fil_space_set_corrupt(
|
|
/*==================*/
|
|
ulint space_id);
|
|
|
|
/****************************************************************//**
|
|
Generate redo logs for swapping two .ibd files */
|
|
UNIV_INTERN
|
|
void
|
|
fil_mtr_rename_log(
|
|
/*===============*/
|
|
ulint old_space_id, /*!< in: tablespace id of the old
|
|
table. */
|
|
const char* old_name, /*!< in: old table name */
|
|
ulint new_space_id, /*!< in: tablespace id of the new
|
|
table */
|
|
const char* new_name, /*!< in: new table name */
|
|
const char* tmp_name); /*!< in: temp table name used while
|
|
swapping */
|
|
|
|
typedef struct fil_space_struct fil_space_t;
|
|
|
|
#endif
|