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/* Copyright (C) 2007 Michael Widenius
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
Storage of records in block
*/
#define LSN_SIZE 7
#define DIR_COUNT_SIZE 1 /* Stores number of rows on page */
#define DIR_FREE_SIZE 1 /* Pointer to first free dir entry */
#define EMPTY_SPACE_SIZE 2 /* Stores empty space on page */
#define PAGE_TYPE_SIZE 1
#define PAGE_SUFFIX_SIZE 4 /* Bytes for checksum */
#define PAGE_HEADER_SIZE_RAW (LSN_SIZE + DIR_COUNT_SIZE + DIR_FREE_SIZE + \
EMPTY_SPACE_SIZE + PAGE_TYPE_SIZE)
#define PAGE_HEADER_SIZE(share) (PAGE_HEADER_SIZE_RAW + \
(share)->crypt_page_header_space)
#define PAGE_OVERHEAD_SIZE_RAW (PAGE_HEADER_SIZE_RAW + DIR_ENTRY_SIZE + \
PAGE_SUFFIX_SIZE)
#define PAGE_OVERHEAD_SIZE(share) (PAGE_OVERHEAD_SIZE_RAW + \
(share)->crypt_page_header_space)
#define BLOCK_RECORD_POINTER_SIZE 6
#define FULL_PAGE_HEADER_SIZE(share) (LSN_SIZE + PAGE_TYPE_SIZE + \
(share)->crypt_page_header_space)
#define FULL_PAGE_SIZE(share) ((share)->block_size - \
FULL_PAGE_HEADER_SIZE(share) - \
PAGE_SUFFIX_SIZE)
#define FULL_PAGE_SIZE2(block_size, crypt_size) \
((block_size) - (LSN_SIZE + PAGE_TYPE_SIZE + PAGE_SUFFIX_SIZE + (crypt_size)))
#define ROW_EXTENT_PAGE_SIZE 5
#define ROW_EXTENT_COUNT_SIZE 2
#define SUB_RANGE_SIZE 2
#define BLOCK_FILLER_SIZE 2
#define ROW_EXTENT_SIZE (ROW_EXTENT_PAGE_SIZE + ROW_EXTENT_COUNT_SIZE)
#define TAIL_BIT 0x8000 /* Bit in page_count to signify tail */
#define START_EXTENT_BIT 0x4000 /* Bit in page_count to signify start*/
/* page_count set by bitmap code for tail pages */
#define TAIL_PAGE_COUNT_MARKER 0xffff
/* Number of extents reserved MARIA_BITMAP_BLOCKS to store head part */
#define ELEMENTS_RESERVED_FOR_MAIN_PART 4
/* This is just used to prealloc a dynamic array */
#define AVERAGE_BLOB_SIZE 1024L*1024L
/* Number of pages to store continuous blob parts */
#define BLOB_SEGMENT_MIN_SIZE 128
/* Fields before 'row->null_field_lengths' used by find_where_to_split_row */
#define EXTRA_LENGTH_FIELDS 3
/* Size for the different parts in the row header (and head page) */
#define FLAG_SIZE 1
#define VERPTR_SIZE 7
#define DIR_ENTRY_SIZE 4
#define FIELD_OFFSET_SIZE 2 /* size of pointers to field starts */
/* Minimum header size needed for a new row */
#define BASE_ROW_HEADER_SIZE FLAG_SIZE
#define PAGE_TYPE_MASK 7
enum en_page_type { UNALLOCATED_PAGE, HEAD_PAGE, TAIL_PAGE, BLOB_PAGE, MAX_PAGE_TYPE };
#define PAGE_CAN_BE_COMPACTED 128 /* Bit in PAGE_TYPE */
#define PAGE_TYPE_OFFSET LSN_SIZE
#define DIR_COUNT_OFFSET (LSN_SIZE+PAGE_TYPE_SIZE)
#define DIR_FREE_OFFSET (DIR_COUNT_OFFSET+DIR_COUNT_SIZE)
#define EMPTY_SPACE_OFFSET (DIR_FREE_OFFSET+DIR_FREE_SIZE)
/* for encryption */
#define KEY_VERSION_OFFSET (EMPTY_SPACE_OFFSET+EMPTY_SPACE_SIZE)
#define FULL_PAGE_KEY_VERSION_OFFSET (PAGE_TYPE_OFFSET + PAGE_TYPE_SIZE)
/* Bits used for flag uchar (one byte, first in record) */
#define ROW_FLAG_TRANSID 1
#define ROW_FLAG_VER_PTR 2
#define ROW_FLAG_DELETE_TRANSID 4
#define ROW_FLAG_NULLS_EXTENDED 8
#define ROW_FLAG_EXTENTS 128
#define ROW_FLAG_ALL (1+2+4+8+128)
/* Size for buffer to hold information about bitmap */
#define MAX_BITMAP_INFO_LENGTH ((MARIA_MAX_KEY_BLOCK_LENGTH*8/3)*(61*11/60)+10)
/******** Variables that affects how data pages are utilized ********/
/* Minium size of tail segment */
#define MIN_TAIL_SIZE 32
/*
Fixed length part of Max possible header size; See row data structure
table in ma_blockrec.c.
*/
#define MAX_FIXED_HEADER_SIZE (FLAG_SIZE + 3 + ROW_EXTENT_SIZE + 3)
#define TRANS_MAX_FIXED_HEADER_SIZE (MAX_FIXED_HEADER_SIZE + \
TRANSID_SIZE + VERPTR_SIZE + \
TRANSID_SIZE)
/* We use 1 uchar in record header to store number of directory entries */
#define MAX_ROWS_PER_PAGE 255
#define END_OF_DIR_FREE_LIST ((uchar) 255)
/* Bits for MARIA_BITMAP_BLOCKS->used */
/* We stored data on disk in the block */
#define BLOCKUSED_USED 1
/* Bitmap on disk is block->org_bitmap_value ; Happens only on update */
#define BLOCKUSED_USE_ORG_BITMAP 2
/* We stored tail data on disk for the block */
#define BLOCKUSED_TAIL 4
/******* defines that affects allocation (density) of data *******/
/*
If the tail part (from the main block or a blob) would use more than 75 % of
the size of page, store the tail on a full page instead of a shared
tail page.
*/
#define MAX_TAIL_SIZE(block_size) ((block_size) *3 / 4)
/* Don't allocate memory for too many row extents on the stack */
#define ROW_EXTENTS_ON_STACK 32
/* Functions to convert MARIA_RECORD_POS to/from page:offset */
static inline MARIA_RECORD_POS ma_recordpos(pgcache_page_no_t page,
uint dir_entry)
{
DBUG_ASSERT(dir_entry <= 255);
DBUG_ASSERT(page > 0); /* page 0 is bitmap, not data page */
return (MARIA_RECORD_POS) (((ulonglong) page << 8) | dir_entry);
}
static inline pgcache_page_no_t ma_recordpos_to_page(MARIA_RECORD_POS record_pos)
{
return (pgcache_page_no_t) (record_pos >> 8);
}
static inline uint ma_recordpos_to_dir_entry(MARIA_RECORD_POS record_pos)
{
return (uint) (record_pos & 255);
}
static inline uchar *dir_entry_pos(uchar *buff, uint block_size, uint pos)
{
return (buff + block_size - DIR_ENTRY_SIZE * pos - PAGE_SUFFIX_SIZE -
DIR_ENTRY_SIZE);
}
/* ma_blockrec.c */
void _ma_init_block_record_data(void);
my_bool _ma_once_init_block_record(MARIA_SHARE *share, File dfile);
my_bool _ma_once_end_block_record(MARIA_SHARE *share);
my_bool _ma_init_block_record(MARIA_HA *info);
void _ma_end_block_record(MARIA_HA *info);
my_bool _ma_update_block_record(MARIA_HA *info, MARIA_RECORD_POS pos,
const uchar *oldrec, const uchar *newrec);
my_bool _ma_delete_block_record(MARIA_HA *info, const uchar *record);
int _ma_read_block_record(MARIA_HA *info, uchar *record,
MARIA_RECORD_POS record_pos);
int _ma_read_block_record2(MARIA_HA *info, uchar *record,
uchar *data, uchar *end_of_data);
int _ma_scan_block_record(MARIA_HA *info, uchar *record,
MARIA_RECORD_POS, my_bool);
my_bool _ma_cmp_block_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def,
const uchar *record, MARIA_RECORD_POS pos);
my_bool _ma_scan_init_block_record(MARIA_HA *info);
void _ma_scan_end_block_record(MARIA_HA *info);
int _ma_scan_remember_block_record(MARIA_HA *info,
MARIA_RECORD_POS *lastpos);
int _ma_scan_restore_block_record(MARIA_HA *info,
MARIA_RECORD_POS lastpos);
MARIA_RECORD_POS _ma_write_init_block_record(MARIA_HA *info,
const uchar *record);
my_bool _ma_write_block_record(MARIA_HA *info, const uchar *record);
my_bool _ma_write_abort_block_record(MARIA_HA *info);
my_bool _ma_compare_block_record(register MARIA_HA *info,
register const uchar *record);
void _ma_compact_block_page(MARIA_SHARE *share, uchar *buff, uint rownr,
my_bool extend_block, TrID min_read_from,
uint min_row_length);
my_bool enough_free_entries_on_page(MARIA_SHARE *share, uchar *page_buff);
TRANSLOG_ADDRESS
maria_page_get_lsn(uchar *page, pgcache_page_no_t page_no, uchar* data_ptr);
/* ma_bitmap.c */
extern const char *bits_to_txt[];
my_bool _ma_bitmap_init(MARIA_SHARE *share, File file,
pgcache_page_no_t *last_page);
my_bool _ma_bitmap_end(MARIA_SHARE *share);
my_bool _ma_bitmap_flush(MARIA_SHARE *share);
my_bool _ma_bitmap_flush_all(MARIA_SHARE *share);
void _ma_bitmap_reset_cache(MARIA_SHARE *share);
my_bool _ma_bitmap_find_place(MARIA_HA *info, MARIA_ROW *row,
MARIA_BITMAP_BLOCKS *result_blocks);
my_bool _ma_bitmap_release_unused(MARIA_HA *info, MARIA_BITMAP_BLOCKS *blocks);
my_bool _ma_bitmap_free_full_pages(MARIA_HA *info, const uchar *extents,
uint count);
my_bool _ma_bitmap_set(MARIA_HA *info, pgcache_page_no_t pos, my_bool head,
uint empty_space);
my_bool _ma_bitmap_reset_full_page_bits(MARIA_HA *info,
MARIA_FILE_BITMAP *bitmap,
pgcache_page_no_t page,
uint page_count);
my_bool _ma_bitmap_set_full_page_bits(MARIA_HA *info,
MARIA_FILE_BITMAP *bitmap,
pgcache_page_no_t page, uint page_count);
uint _ma_free_size_to_head_pattern(MARIA_FILE_BITMAP *bitmap, uint size);
my_bool _ma_bitmap_find_new_place(MARIA_HA *info, MARIA_ROW *new_row,
pgcache_page_no_t page, uint free_size,
MARIA_BITMAP_BLOCKS *result_blocks);
my_bool _ma_check_bitmap_data(MARIA_HA *info,
enum en_page_type page_type,
uint empty_space, uint bitmap_pattern);
my_bool _ma_check_if_right_bitmap_type(MARIA_HA *info,
enum en_page_type page_type,
pgcache_page_no_t page,
uint *bitmap_pattern);
uint _ma_bitmap_get_page_bits(MARIA_HA *info, MARIA_FILE_BITMAP *bitmap,
pgcache_page_no_t page);
void _ma_bitmap_delete_all(MARIA_SHARE *share);
int _ma_bitmap_create_first(MARIA_SHARE *share);
void _ma_bitmap_flushable(MARIA_HA *info, int non_flushable_inc);
void _ma_bitmap_lock(MARIA_SHARE *share);
void _ma_bitmap_unlock(MARIA_SHARE *share);
void _ma_bitmap_set_pagecache_callbacks(PAGECACHE_FILE *file,
MARIA_SHARE *share);
#ifndef DBUG_OFF
void _ma_print_bitmap(MARIA_FILE_BITMAP *bitmap, uchar *data,
pgcache_page_no_t page);
#endif
void _ma_get_bitmap_description(MARIA_FILE_BITMAP *bitmap,
uchar *bitmap_data,
pgcache_page_no_t page,
char *out);
uint _ma_apply_redo_insert_row_head_or_tail(MARIA_HA *info, LSN lsn,
uint page_type,
my_bool new_page,
const uchar *header,
const uchar *data,
size_t data_length);
uint _ma_apply_redo_purge_row_head_or_tail(MARIA_HA *info, LSN lsn,
uint page_type,
const uchar *header);
uint _ma_apply_redo_free_blocks(MARIA_HA *info, LSN lsn, LSN rec_lsn,
const uchar *header);
uint _ma_apply_redo_free_head_or_tail(MARIA_HA *info, LSN lsn,
const uchar *header);
uint _ma_apply_redo_insert_row_blobs(MARIA_HA *info, LSN lsn,
const uchar *header, LSN redo_lsn,
uint * const number_of_blobs,
uint * const number_of_ranges,
pgcache_page_no_t * const first_page,
pgcache_page_no_t * const last_page);
my_bool _ma_apply_redo_bitmap_new_page(MARIA_HA *info, LSN lsn,
const uchar *header);
my_bool _ma_apply_undo_row_insert(MARIA_HA *info, LSN undo_lsn,
const uchar *header);
my_bool _ma_apply_undo_row_delete(MARIA_HA *info, LSN undo_lsn,
const uchar *header, size_t length);
my_bool _ma_apply_undo_row_update(MARIA_HA *info, LSN undo_lsn,
const uchar *header, size_t length);
my_bool _ma_apply_undo_bulk_insert(MARIA_HA *info, LSN undo_lsn);
my_bool write_hook_for_redo(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
void *hook_arg);
my_bool write_hook_for_undo(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
void *hook_arg);
my_bool write_hook_for_redo_delete_all(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info,
LSN *lsn, void *hook_arg);
my_bool write_hook_for_undo_row_insert(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info,
LSN *lsn, void *hook_arg);
my_bool write_hook_for_undo_row_delete(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info,
LSN *lsn, void *hook_arg);
my_bool write_hook_for_undo_row_update(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info,
LSN *lsn, void *hook_arg);
my_bool write_hook_for_undo_bulk_insert(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info,
LSN *lsn, void *hook_arg);
my_bool write_hook_for_file_id(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
void *hook_arg);
my_bool write_hook_for_commit(enum translog_record_type type,
TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
void *hook_arg);
void _ma_block_get_status(void *param, my_bool concurrent_insert);
my_bool _ma_block_start_trans(void* param);
my_bool _ma_block_start_trans_no_versioning(void *param);
void _ma_block_update_status(void *param);
void _ma_block_restore_status(void *param);
my_bool _ma_block_check_status(void *param);
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