1
/*****************************************************************************
3
Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved.
5
This program is free software; you can redistribute it and/or modify it under
6
the terms of the GNU General Public License as published by the Free Software
7
Foundation; version 2 of the License.
9
This program is distributed in the hope that it will be useful, but WITHOUT
10
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13
You should have received a copy of the GNU General Public License along with
14
this program; if not, write to the Free Software Foundation, Inc.,
15
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
17
*****************************************************************************/
19
/**************************************************//**
20
@file include/fsp0fsp.h
23
Created 12/18/1995 Heikki Tuuri
24
*******************************************************/
31
#ifndef UNIV_INNOCHECKSUM
36
#include "page0types.h"
37
#include "fsp0types.h"
39
#endif /* !UNIV_INNOCHECKSUM */
41
/* @defgroup fsp_flags InnoDB Tablespace Flag Constants @{ */
43
/** Width of the POST_ANTELOPE flag */
44
#define FSP_FLAGS_WIDTH_POST_ANTELOPE 1
45
/** Number of flag bits used to indicate the tablespace zip page size */
46
#define FSP_FLAGS_WIDTH_ZIP_SSIZE 4
47
/** Width of the ATOMIC_BLOBS flag. The ability to break up a long
48
column into an in-record prefix and an externally stored part is available
49
to the two Barracuda row formats COMPRESSED and DYNAMIC. */
50
#define FSP_FLAGS_WIDTH_ATOMIC_BLOBS 1
51
/** Number of flag bits used to indicate the tablespace page size */
52
#define FSP_FLAGS_WIDTH_PAGE_SSIZE 4
53
/** Width of the DATA_DIR flag. This flag indicates that the tablespace
54
is found in a remote location, not the default data directory. */
55
#define FSP_FLAGS_WIDTH_DATA_DIR 1
56
/** Width of all the currently known tablespace flags */
57
#define FSP_FLAGS_WIDTH (FSP_FLAGS_WIDTH_POST_ANTELOPE \
58
+ FSP_FLAGS_WIDTH_ZIP_SSIZE \
59
+ FSP_FLAGS_WIDTH_ATOMIC_BLOBS \
60
+ FSP_FLAGS_WIDTH_PAGE_SSIZE \
61
+ FSP_FLAGS_WIDTH_DATA_DIR)
63
/** A mask of all the known/used bits in tablespace flags */
64
#define FSP_FLAGS_MASK (~(~0 << FSP_FLAGS_WIDTH))
66
/** Zero relative shift position of the POST_ANTELOPE field */
67
#define FSP_FLAGS_POS_POST_ANTELOPE 0
68
/** Zero relative shift position of the ZIP_SSIZE field */
69
#define FSP_FLAGS_POS_ZIP_SSIZE (FSP_FLAGS_POS_POST_ANTELOPE \
70
+ FSP_FLAGS_WIDTH_POST_ANTELOPE)
71
/** Zero relative shift position of the ATOMIC_BLOBS field */
72
#define FSP_FLAGS_POS_ATOMIC_BLOBS (FSP_FLAGS_POS_ZIP_SSIZE \
73
+ FSP_FLAGS_WIDTH_ZIP_SSIZE)
74
/** Zero relative shift position of the PAGE_SSIZE field */
75
#define FSP_FLAGS_POS_PAGE_SSIZE (FSP_FLAGS_POS_ATOMIC_BLOBS \
76
+ FSP_FLAGS_WIDTH_ATOMIC_BLOBS)
77
/** Zero relative shift position of the start of the UNUSED bits */
78
#define FSP_FLAGS_POS_DATA_DIR (FSP_FLAGS_POS_PAGE_SSIZE \
79
+ FSP_FLAGS_WIDTH_PAGE_SSIZE)
80
/** Zero relative shift position of the start of the UNUSED bits */
81
#define FSP_FLAGS_POS_UNUSED (FSP_FLAGS_POS_DATA_DIR \
82
+ FSP_FLAGS_WIDTH_DATA_DIR)
84
/** Bit mask of the POST_ANTELOPE field */
85
#define FSP_FLAGS_MASK_POST_ANTELOPE \
86
((~(~0 << FSP_FLAGS_WIDTH_POST_ANTELOPE)) \
87
<< FSP_FLAGS_POS_POST_ANTELOPE)
88
/** Bit mask of the ZIP_SSIZE field */
89
#define FSP_FLAGS_MASK_ZIP_SSIZE \
90
((~(~0 << FSP_FLAGS_WIDTH_ZIP_SSIZE)) \
91
<< FSP_FLAGS_POS_ZIP_SSIZE)
92
/** Bit mask of the ATOMIC_BLOBS field */
93
#define FSP_FLAGS_MASK_ATOMIC_BLOBS \
94
((~(~0 << FSP_FLAGS_WIDTH_ATOMIC_BLOBS)) \
95
<< FSP_FLAGS_POS_ATOMIC_BLOBS)
96
/** Bit mask of the PAGE_SSIZE field */
97
#define FSP_FLAGS_MASK_PAGE_SSIZE \
98
((~(~0 << FSP_FLAGS_WIDTH_PAGE_SSIZE)) \
99
<< FSP_FLAGS_POS_PAGE_SSIZE)
100
/** Bit mask of the DATA_DIR field */
101
#define FSP_FLAGS_MASK_DATA_DIR \
102
((~(~0 << FSP_FLAGS_WIDTH_DATA_DIR)) \
103
<< FSP_FLAGS_POS_DATA_DIR)
105
/** Return the value of the POST_ANTELOPE field */
106
#define FSP_FLAGS_GET_POST_ANTELOPE(flags) \
107
((flags & FSP_FLAGS_MASK_POST_ANTELOPE) \
108
>> FSP_FLAGS_POS_POST_ANTELOPE)
109
/** Return the value of the ZIP_SSIZE field */
110
#define FSP_FLAGS_GET_ZIP_SSIZE(flags) \
111
((flags & FSP_FLAGS_MASK_ZIP_SSIZE) \
112
>> FSP_FLAGS_POS_ZIP_SSIZE)
113
/** Return the value of the ATOMIC_BLOBS field */
114
#define FSP_FLAGS_HAS_ATOMIC_BLOBS(flags) \
115
((flags & FSP_FLAGS_MASK_ATOMIC_BLOBS) \
116
>> FSP_FLAGS_POS_ATOMIC_BLOBS)
117
/** Return the value of the PAGE_SSIZE field */
118
#define FSP_FLAGS_GET_PAGE_SSIZE(flags) \
119
((flags & FSP_FLAGS_MASK_PAGE_SSIZE) \
120
>> FSP_FLAGS_POS_PAGE_SSIZE)
121
/** Return the value of the DATA_DIR field */
122
#define FSP_FLAGS_HAS_DATA_DIR(flags) \
123
((flags & FSP_FLAGS_MASK_DATA_DIR) \
124
>> FSP_FLAGS_POS_DATA_DIR)
125
/** Return the contents of the UNUSED bits */
126
#define FSP_FLAGS_GET_UNUSED(flags) \
127
(flags >> FSP_FLAGS_POS_UNUSED)
129
/** Set a PAGE_SSIZE into the correct bits in a given
131
#define FSP_FLAGS_SET_PAGE_SSIZE(flags, ssize) \
132
(flags | (ssize << FSP_FLAGS_POS_PAGE_SSIZE))
136
/* @defgroup Tablespace Header Constants (moved from fsp0fsp.c) @{ */
138
/** Offset of the space header within a file page */
139
#define FSP_HEADER_OFFSET FIL_PAGE_DATA
141
/* The data structures in files are defined just as byte strings in C */
142
typedef byte fsp_header_t;
148
File space header data structure: this data structure is contained in the
149
first page of a space. The space for this header is reserved in every extent
150
descriptor page, but used only in the first. */
152
/*-------------------------------------*/
153
#define FSP_SPACE_ID 0 /* space id */
154
#define FSP_NOT_USED 4 /* this field contained a value up to
155
which we know that the modifications
156
in the database have been flushed to
157
the file space; not used now */
158
#define FSP_SIZE 8 /* Current size of the space in
160
#define FSP_FREE_LIMIT 12 /* Minimum page number for which the
161
free list has not been initialized:
162
the pages >= this limit are, by
163
definition, free; note that in a
164
single-table tablespace where size
165
< 64 pages, this number is 64, i.e.,
166
we have initialized the space
167
about the first extent, but have not
168
physically allocted those pages to the
170
#define FSP_SPACE_FLAGS 16 /* fsp_space_t.flags, similar to
171
dict_table_t::flags */
172
#define FSP_FRAG_N_USED 20 /* number of used pages in the
173
FSP_FREE_FRAG list */
174
#define FSP_FREE 24 /* list of free extents */
175
#define FSP_FREE_FRAG (24 + FLST_BASE_NODE_SIZE)
176
/* list of partially free extents not
177
belonging to any segment */
178
#define FSP_FULL_FRAG (24 + 2 * FLST_BASE_NODE_SIZE)
179
/* list of full extents not belonging
181
#define FSP_SEG_ID (24 + 3 * FLST_BASE_NODE_SIZE)
182
/* 8 bytes which give the first unused
184
#define FSP_SEG_INODES_FULL (32 + 3 * FLST_BASE_NODE_SIZE)
185
/* list of pages containing segment
186
headers, where all the segment inode
187
slots are reserved */
188
#define FSP_SEG_INODES_FREE (32 + 4 * FLST_BASE_NODE_SIZE)
189
/* list of pages containing segment
190
headers, where not all the segment
191
header slots are reserved */
192
/*-------------------------------------*/
193
/* File space header size */
194
#define FSP_HEADER_SIZE (32 + 5 * FLST_BASE_NODE_SIZE)
196
#define FSP_FREE_ADD 4 /* this many free extents are added
197
to the free list from above
198
FSP_FREE_LIMIT at a time */
201
#ifndef UNIV_INNOCHECKSUM
203
/* @defgroup File Segment Inode Constants (moved from fsp0fsp.c) @{ */
205
/* FILE SEGMENT INODE
208
Segment inode which is created for each segment in a tablespace. NOTE: in
209
purge we assume that a segment having only one currently used page can be
210
freed in a few steps, so that the freeing cannot fill the file buffer with
211
bufferfixed file pages. */
213
typedef byte fseg_inode_t;
215
#define FSEG_INODE_PAGE_NODE FSEG_PAGE_DATA
216
/* the list node for linking
217
segment inode pages */
219
#define FSEG_ARR_OFFSET (FSEG_PAGE_DATA + FLST_NODE_SIZE)
220
/*-------------------------------------*/
221
#define FSEG_ID 0 /* 8 bytes of segment id: if this is 0,
222
it means that the header is unused */
223
#define FSEG_NOT_FULL_N_USED 8
224
/* number of used segment pages in
225
the FSEG_NOT_FULL list */
227
/* list of free extents of this
229
#define FSEG_NOT_FULL (12 + FLST_BASE_NODE_SIZE)
230
/* list of partially free extents */
231
#define FSEG_FULL (12 + 2 * FLST_BASE_NODE_SIZE)
232
/* list of full extents */
233
#define FSEG_MAGIC_N (12 + 3 * FLST_BASE_NODE_SIZE)
234
/* magic number used in debugging */
235
#define FSEG_FRAG_ARR (16 + 3 * FLST_BASE_NODE_SIZE)
236
/* array of individual pages
237
belonging to this segment in fsp
238
fragment extent lists */
239
#define FSEG_FRAG_ARR_N_SLOTS (FSP_EXTENT_SIZE / 2)
240
/* number of slots in the array for
241
the fragment pages */
242
#define FSEG_FRAG_SLOT_SIZE 4 /* a fragment page slot contains its
243
page number within space, FIL_NULL
244
means that the slot is not in use */
245
/*-------------------------------------*/
246
#define FSEG_INODE_SIZE \
247
(16 + 3 * FLST_BASE_NODE_SIZE \
248
+ FSEG_FRAG_ARR_N_SLOTS * FSEG_FRAG_SLOT_SIZE)
250
#define FSP_SEG_INODES_PER_PAGE(zip_size) \
251
(((zip_size ? zip_size : UNIV_PAGE_SIZE) \
252
- FSEG_ARR_OFFSET - 10) / FSEG_INODE_SIZE)
253
/* Number of segment inodes which fit on a
256
#define FSEG_MAGIC_N_VALUE 97937874
258
#define FSEG_FILLFACTOR 8 /* If this value is x, then if
259
the number of unused but reserved
260
pages in a segment is less than
261
reserved pages * 1/x, and there are
262
at least FSEG_FRAG_LIMIT used pages,
263
then we allow a new empty extent to
264
be added to the segment in
265
fseg_alloc_free_page. Otherwise, we
266
use unused pages of the segment. */
268
#define FSEG_FRAG_LIMIT FSEG_FRAG_ARR_N_SLOTS
269
/* If the segment has >= this many
270
used pages, it may be expanded by
271
allocating extents to the segment;
272
until that only individual fragment
273
pages are allocated from the space */
275
#define FSEG_FREE_LIST_LIMIT 40 /* If the reserved size of a segment
276
is at least this many extents, we
277
allow extents to be put to the free
278
list of the extent: at most
279
FSEG_FREE_LIST_MAX_LEN many */
280
#define FSEG_FREE_LIST_MAX_LEN 4
283
/* @defgroup Extent Descriptor Constants (moved from fsp0fsp.c) @{ */
288
File extent descriptor data structure: contains bits to tell which pages in
289
the extent are free and which contain old tuple version to clean. */
291
/*-------------------------------------*/
292
#define XDES_ID 0 /* The identifier of the segment
293
to which this extent belongs */
294
#define XDES_FLST_NODE 8 /* The list node data structure
295
for the descriptors */
296
#define XDES_STATE (FLST_NODE_SIZE + 8)
297
/* contains state information
299
#define XDES_BITMAP (FLST_NODE_SIZE + 12)
300
/* Descriptor bitmap of the pages
302
/*-------------------------------------*/
304
#define XDES_BITS_PER_PAGE 2 /* How many bits are there per page */
305
#define XDES_FREE_BIT 0 /* Index of the bit which tells if
307
#define XDES_CLEAN_BIT 1 /* NOTE: currently not used!
308
Index of the bit which tells if
309
there are old versions of tuples
311
/* States of a descriptor */
312
#define XDES_FREE 1 /* extent is in free list of space */
313
#define XDES_FREE_FRAG 2 /* extent is in free fragment list of
315
#define XDES_FULL_FRAG 3 /* extent is in full fragment list of
317
#define XDES_FSEG 4 /* extent belongs to a segment */
319
/** File extent data structure size in bytes. */
322
+ UT_BITS_IN_BYTES(FSP_EXTENT_SIZE * XDES_BITS_PER_PAGE))
324
/** File extent data structure size in bytes for MAX page size. */
325
#define XDES_SIZE_MAX \
327
+ UT_BITS_IN_BYTES(FSP_EXTENT_SIZE_MAX * XDES_BITS_PER_PAGE))
329
/** File extent data structure size in bytes for MIN page size. */
330
#define XDES_SIZE_MIN \
332
+ UT_BITS_IN_BYTES(FSP_EXTENT_SIZE_MIN * XDES_BITS_PER_PAGE))
334
/** Offset of the descriptor array on a descriptor page */
335
#define XDES_ARR_OFFSET (FSP_HEADER_OFFSET + FSP_HEADER_SIZE)
339
/**********************************************************************//**
340
Initializes the file space system. */
345
/**********************************************************************//**
346
Gets the size of the system tablespace from the tablespace header. If
347
we do not have an auto-extending data file, this should be equal to
348
the size of the data files. If there is an auto-extending data file,
350
@return size in pages */
353
fsp_header_get_tablespace_size(void);
354
/*================================*/
355
/**********************************************************************//**
356
Reads the file space size stored in the header page.
357
@return tablespace size stored in the space header */
362
page_t* page); /*!< in: header page (page 0 in the tablespace) */
363
/**********************************************************************//**
364
Reads the space id from the first page of a tablespace.
365
@return space id, ULINT UNDEFINED if error */
368
fsp_header_get_space_id(
369
/*====================*/
370
const page_t* page); /*!< in: first page of a tablespace */
371
/**********************************************************************//**
372
Reads the space flags from the first page of a tablespace.
376
fsp_header_get_flags(
377
/*=================*/
378
const page_t* page); /*!< in: first page of a tablespace */
379
/**********************************************************************//**
380
Reads the compressed page size from the first page of a tablespace.
381
@return compressed page size in bytes, or 0 if uncompressed */
384
fsp_header_get_zip_size(
385
/*====================*/
386
const page_t* page); /*!< in: first page of a tablespace */
387
/**********************************************************************//**
388
Writes the space id and flags to a tablespace header. The flags contain
389
row type, physical/compressed page size, and logical/uncompressed page
390
size of the tablespace. */
393
fsp_header_init_fields(
394
/*===================*/
395
page_t* page, /*!< in/out: first page in the space */
396
ulint space_id, /*!< in: space id */
397
ulint flags); /*!< in: tablespace flags (FSP_SPACE_FLAGS):
398
0, or table->flags if newer than COMPACT */
399
/**********************************************************************//**
400
Initializes the space header of a new created space and creates also the
401
insert buffer tree root if space == 0. */
406
ulint space, /*!< in: space id */
407
ulint size, /*!< in: current size in blocks */
408
mtr_t* mtr); /*!< in/out: mini-transaction */
409
/**********************************************************************//**
410
Increases the space size field of a space. */
415
ulint space, /*!< in: space id */
416
ulint size_inc, /*!< in: size increment in pages */
417
mtr_t* mtr); /*!< in/out: mini-transaction */
418
/**********************************************************************//**
419
Creates a new segment.
420
@return the block where the segment header is placed, x-latched, NULL
421
if could not create segment because of lack of space */
426
ulint space, /*!< in: space id */
427
ulint page, /*!< in: page where the segment header is placed: if
428
this is != 0, the page must belong to another segment,
429
if this is 0, a new page will be allocated and it
430
will belong to the created segment */
431
ulint byte_offset, /*!< in: byte offset of the created segment header
433
mtr_t* mtr); /*!< in/out: mini-transaction */
434
/**********************************************************************//**
435
Creates a new segment.
436
@return the block where the segment header is placed, x-latched, NULL
437
if could not create segment because of lack of space */
442
ulint space, /*!< in: space id */
443
ulint page, /*!< in: page where the segment header is placed: if
444
this is != 0, the page must belong to another segment,
445
if this is 0, a new page will be allocated and it
446
will belong to the created segment */
447
ulint byte_offset, /*!< in: byte offset of the created segment header
449
ibool has_done_reservation, /*!< in: TRUE if the caller has already
450
done the reservation for the pages with
451
fsp_reserve_free_extents (at least 2 extents: one for
452
the inode and the other for the segment) then there is
453
no need to do the check for this individual
455
mtr_t* mtr); /*!< in/out: mini-transaction */
456
/**********************************************************************//**
457
Calculates the number of pages reserved by a segment, and how many pages are
459
@return number of reserved pages */
462
fseg_n_reserved_pages(
463
/*==================*/
464
fseg_header_t* header, /*!< in: segment header */
465
ulint* used, /*!< out: number of pages used (<= reserved) */
466
mtr_t* mtr); /*!< in/out: mini-transaction */
467
/**********************************************************************//**
468
Allocates a single free page from a segment. This function implements
469
the intelligent allocation strategy which tries to minimize
470
file space fragmentation.
471
@param[in/out] seg_header segment header
472
@param[in] hint hint of which page would be desirable
473
@param[in] direction if the new page is needed because
474
of an index page split, and records are
475
inserted there in order, into which
476
direction they go alphabetically: FSP_DOWN,
478
@param[in/out] mtr mini-transaction
479
@return X-latched block, or NULL if no page could be allocated */
480
#define fseg_alloc_free_page(seg_header, hint, direction, mtr) \
481
fseg_alloc_free_page_general(seg_header, hint, direction, \
483
/**********************************************************************//**
484
Allocates a single free page from a segment. This function implements
485
the intelligent allocation strategy which tries to minimize file space
487
@retval NULL if no page could be allocated
488
@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded
489
(init_mtr == mtr, or the page was not previously freed in mtr)
490
@retval block (not allocated or initialized) otherwise */
493
fseg_alloc_free_page_general(
494
/*=========================*/
495
fseg_header_t* seg_header,/*!< in/out: segment header */
496
ulint hint, /*!< in: hint of which page would be
498
byte direction,/*!< in: if the new page is needed because
499
of an index page split, and records are
500
inserted there in order, into which
501
direction they go alphabetically: FSP_DOWN,
502
FSP_UP, FSP_NO_DIR */
503
ibool has_done_reservation, /*!< in: TRUE if the caller has
504
already done the reservation for the page
505
with fsp_reserve_free_extents, then there
506
is no need to do the check for this individual
508
mtr_t* mtr, /*!< in/out: mini-transaction */
509
mtr_t* init_mtr)/*!< in/out: mtr or another mini-transaction
510
in which the page should be initialized.
511
If init_mtr!=mtr, but the page is already
512
latched in mtr, do not initialize the page. */
513
__attribute__((warn_unused_result, nonnull));
514
/**********************************************************************//**
515
Reserves free pages from a tablespace. All mini-transactions which may
516
use several pages from the tablespace should call this function beforehand
517
and reserve enough free extents so that they certainly will be able
518
to do their operation, like a B-tree page split, fully. Reservations
519
must be released with function fil_space_release_free_extents!
521
The alloc_type below has the following meaning: FSP_NORMAL means an
522
operation which will probably result in more space usage, like an
523
insert in a B-tree; FSP_UNDO means allocation to undo logs: if we are
524
deleting rows, then this allocation will in the long run result in
525
less space usage (after a purge); FSP_CLEANING means allocation done
526
in a physical record delete (like in a purge) or other cleaning operation
527
which will result in less space usage in the long run. We prefer the latter
528
two types of allocation: when space is scarce, FSP_NORMAL allocations
529
will not succeed, but the latter two allocations will succeed, if possible.
530
The purpose is to avoid dead end where the database is full but the
531
user cannot free any space because these freeing operations temporarily
534
Single-table tablespaces whose size is < 32 pages are a special case. In this
535
function we would liberally reserve several 64 page extents for every page
536
split or merge in a B-tree. But we do not want to waste disk space if the table
537
only occupies < 32 pages. That is why we apply different rules in that special
538
case, just ensuring that there are 3 free pages available.
539
@return TRUE if we were able to make the reservation */
542
fsp_reserve_free_extents(
543
/*=====================*/
544
ulint* n_reserved,/*!< out: number of extents actually reserved; if we
545
return TRUE and the tablespace size is < 64 pages,
546
then this can be 0, otherwise it is n_ext */
547
ulint space, /*!< in: space id */
548
ulint n_ext, /*!< in: number of extents to reserve */
549
ulint alloc_type,/*!< in: FSP_NORMAL, FSP_UNDO, or FSP_CLEANING */
550
mtr_t* mtr); /*!< in: mini-transaction */
551
/**********************************************************************//**
552
This function should be used to get information on how much we still
553
will be able to insert new data to the database without running out the
554
tablespace. Only free extents are taken into account and we also subtract
555
the safety margin required by the above function fsp_reserve_free_extents.
556
@return available space in kB */
559
fsp_get_available_space_in_free_extents(
560
/*====================================*/
561
ulint space); /*!< in: space id */
562
/**********************************************************************//**
563
Frees a single page of a segment. */
568
fseg_header_t* seg_header, /*!< in: segment header */
569
ulint space, /*!< in: space id */
570
ulint page, /*!< in: page offset */
571
mtr_t* mtr); /*!< in/out: mini-transaction */
572
/**********************************************************************//**
573
Checks if a single page of a segment is free.
574
@return true if free */
579
fseg_header_t* seg_header, /*!< in: segment header */
580
ulint space, /*!< in: space id */
581
ulint page) /*!< in: page offset */
582
__attribute__((nonnull, warn_unused_result));
583
/**********************************************************************//**
584
Frees part of a segment. This function can be used to free a segment
585
by repeatedly calling this function in different mini-transactions.
586
Doing the freeing in a single mini-transaction might result in
587
too big a mini-transaction.
588
@return TRUE if freeing completed */
593
fseg_header_t* header, /*!< in, own: segment header; NOTE: if the header
594
resides on the first page of the frag list
595
of the segment, this pointer becomes obsolete
596
after the last freeing step */
597
mtr_t* mtr); /*!< in/out: mini-transaction */
598
/**********************************************************************//**
599
Frees part of a segment. Differs from fseg_free_step because this function
600
leaves the header page unfreed.
601
@return TRUE if freeing completed, except the header page */
604
fseg_free_step_not_header(
605
/*======================*/
606
fseg_header_t* header, /*!< in: segment header which must reside on
607
the first fragment page of the segment */
608
mtr_t* mtr); /*!< in/out: mini-transaction */
609
/***********************************************************************//**
610
Checks if a page address is an extent descriptor page address.
611
@return TRUE if a descriptor page */
616
ulint zip_size,/*!< in: compressed page size in bytes;
617
0 for uncompressed pages */
618
ulint page_no);/*!< in: page number */
619
/***********************************************************//**
620
Parses a redo log record of a file page init.
621
@return end of log record or NULL */
624
fsp_parse_init_file_page(
625
/*=====================*/
626
byte* ptr, /*!< in: buffer */
627
byte* end_ptr, /*!< in: buffer end */
628
buf_block_t* block); /*!< in: block or NULL */
629
/*******************************************************************//**
630
Validates the file space system and its segments.
631
@return TRUE if ok */
636
ulint space); /*!< in: space id */
637
/*******************************************************************//**
638
Prints info of a file space. */
643
ulint space); /*!< in: space id */
645
/*******************************************************************//**
647
@return TRUE if ok */
652
fseg_header_t* header, /*!< in: segment header */
653
mtr_t* mtr); /*!< in/out: mini-transaction */
654
#endif /* UNIV_DEBUG */
655
#ifdef UNIV_BTR_PRINT
656
/*******************************************************************//**
657
Writes info of a segment. */
662
fseg_header_t* header, /*!< in: segment header */
663
mtr_t* mtr); /*!< in/out: mini-transaction */
664
#endif /* UNIV_BTR_PRINT */
666
/********************************************************************//**
667
Validate and return the tablespace flags, which are stored in the
668
tablespace header at offset FSP_SPACE_FLAGS. They should be 0 for
669
ROW_FORMAT=COMPACT and ROW_FORMAT=REDUNDANT. The newer row formats,
670
COMPRESSED and DYNAMIC, use a file format > Antelope so they should
671
have a file format number plus the DICT_TF_COMPACT bit set.
672
@return true if check ok */
677
ulint flags) /*!< in: tablespace flags */
678
__attribute__((warn_unused_result, const));
679
/********************************************************************//**
680
Determine if the tablespace is compressed from dict_table_t::flags.
681
@return TRUE if compressed, FALSE if not compressed */
684
fsp_flags_is_compressed(
685
/*====================*/
686
ulint flags); /*!< in: tablespace flags */
688
/********************************************************************//**
689
Calculates the descriptor index within a descriptor page.
690
@return descriptor index */
693
xdes_calc_descriptor_index(
694
/*=======================*/
695
ulint zip_size, /*!< in: compressed page size in bytes;
696
0 for uncompressed pages */
697
ulint offset); /*!< in: page offset */
699
/**********************************************************************//**
700
Gets a descriptor bit of a page.
701
@return TRUE if free */
706
const xdes_t* descr, /*!< in: descriptor */
707
ulint bit, /*!< in: XDES_FREE_BIT or XDES_CLEAN_BIT */
708
ulint offset);/*!< in: page offset within extent:
709
0 ... FSP_EXTENT_SIZE - 1 */
711
/********************************************************************//**
712
Calculates the page where the descriptor of a page resides.
713
@return descriptor page offset */
716
xdes_calc_descriptor_page(
717
/*======================*/
718
ulint zip_size, /*!< in: compressed page size in bytes;
719
0 for uncompressed pages */
720
ulint offset); /*!< in: page offset */
722
#endif /* !UNIV_INNOCHECKSUM */
724
/********************************************************************//**
725
Extract the zip size from tablespace flags. A tablespace has only one
726
physical page size whether that page is compressed or not.
727
@return compressed page size of the file-per-table tablespace in bytes,
728
or zero if the table is not compressed. */
731
fsp_flags_get_zip_size(
732
/*====================*/
733
ulint flags); /*!< in: tablespace flags */
734
/********************************************************************//**
735
Extract the page size from tablespace flags.
736
@return page size of the tablespace in bytes */
739
fsp_flags_get_page_size(
740
/*====================*/
741
ulint flags); /*!< in: tablespace flags */
744
#include "fsp0fsp.ic"