fsp0fsp.cc File Reference

#include "fsp0fsp.h"
#include "buf0buf.h"
#include "fil0fil.h"
#include "mtr0log.h"
#include "ut0byte.h"
#include "page0page.h"
#include "page0zip.h"
#include "sync0sync.h"
#include "fut0fut.h"
#include "srv0srv.h"
#include "ibuf0ibuf.h"
#include "btr0btr.h"
#include "btr0sea.h"
#include "dict0boot.h"
#include "log0log.h"
#include "dict0mem.h"
#include "srv0start.h"

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Functions
UNIV_INTERN ulint	fsp_get_size_low (page_t *page)
UNIV_INLINE fsp_header_t *	fsp_get_space_header (ulint id, ulint zip_size, mtr_t *mtr)
UNIV_INLINE ibool	xdes_mtr_get_bit (const xdes_t *descr, ulint bit, ulint offset, mtr_t *mtr)
UNIV_INLINE void	xdes_set_bit (xdes_t *descr, ulint bit, ulint offset, ibool val, mtr_t *mtr)
UNIV_INLINE ulint	xdes_find_bit (xdes_t *descr, ulint bit, ibool val, ulint hint, mtr_t *mtr)
UNIV_INLINE ulint	xdes_find_bit_downward (xdes_t *descr, ulint bit, ibool val, ulint hint, mtr_t *mtr)
UNIV_INLINE ulint	xdes_get_n_used (const xdes_t *descr, mtr_t *mtr)
UNIV_INLINE ibool	xdes_is_free (const xdes_t *descr, mtr_t *mtr)
UNIV_INLINE ibool	xdes_is_full (const xdes_t *descr, mtr_t *mtr)
UNIV_INLINE void	xdes_set_state (xdes_t *descr, ulint state, mtr_t *mtr)
UNIV_INLINE ulint	xdes_get_state (const xdes_t *descr, mtr_t *mtr)
UNIV_INLINE void	xdes_init (xdes_t *descr, mtr_t *mtr)
UNIV_INLINE	__attribute__ ((nonnull, warn_unused_result)) xdes_t *xdes_get_descriptor_with_space_hdr(fsp_header_t *sp_header
	ut_ad (mtr_memo_contains(mtr, fil_space_get_latch(space, NULL), MTR_MEMO_X_LOCK))
	ut_ad (mtr_memo_contains_page(mtr, sp_header, MTR_MEMO_PAGE_X_FIX))
	ut_ad (page_offset(sp_header)==FSP_HEADER_OFFSET)
	if ((offset >=size)||(offset >=limit))
	if (descr_page_no==0)

Variables
static ulint	page
static ulint xdes_t *	descr
static ulint xdes_t mtr_t *	mtr
static buf_block_t	nonnull
UNIV_INLINE ulint	space
UNIV_INLINE ulint ulint	offset
UNIV_INLINE ulint ulint mtr_t *mtr ulint	limit = mach_read_from_4(sp_header + FSP_FREE_LIMIT)
ulint	size = mach_read_from_4(sp_header + FSP_SIZE)
ulint	zip_size
ulint	descr_page_no = xdes_calc_descriptor_page(zip_size, offset)
page_t *	descr_page

Detailed Description

File space management

Created 11/29/1995 Heikki Tuuri

Definition in file fsp0fsp.cc.

Function Documentation

static __attribute__

(

(nonnull, warn_unused_result)

)

Gets pointer to a the extent descriptor of a page. The page where the extent descriptor resides is x-locked. This function no longer extends the data file.

Returns

pointer to the extent descriptor, NULL if the page does not exist in the space or if the offset is >= the free limit

Gets pointer to a the extent descriptor of a page. The page where the extent descriptor resides is x-locked. If the page offset is equal to the free limit of the space, adds new extents from above the free limit to the space free list, if not free limit == space size. This adding is necessary to make the descriptor defined, as they are uninitialized above the free limit.

Returns

pointer to the extent descriptor, NULL if the page does not exist in the space or if the offset exceeds the free limit

Removes a secondary index entry if found.

Returns

DB_SUCCESS, DB_FAIL, or DB_OUT_OF_FILE_SPACE

Opens a log file.

Returns

DB_SUCCESS or error code

UNIV_INTERN ulint fsp_get_size_low

(

page_t *

page

)

Reads the file space size stored in the header page.

Returns

tablespace size stored in the space header

Parameters

page	in: header page (page 0 in the tablespace)

Definition at line 172 of file fsp0fsp.cc.

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UNIV_INLINE fsp_header_t* fsp_get_space_header	(	ulint	id,
		ulint	zip_size,
		mtr_t *	mtr
	)

Gets a pointer to the space header and x-locks its page.

Returns

pointer to the space header, page x-locked

Parameters

id	in: space id
zip_size	in: compressed page size in bytes or 0 for uncompressed pages
mtr	in/out: mini-transaction

Definition at line 185 of file fsp0fsp.cc.

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UNIV_INLINE ulint xdes_find_bit	(	xdes_t *	descr,
		ulint	bit,
		ibool	val,
		ulint	hint,
		mtr_t *	mtr
	)

Looks for a descriptor bit having the desired value. Starts from hint and scans upward; at the end of the extent the search is wrapped to the start of the extent.

Returns

bit index of the bit, ULINT_UNDEFINED if not found

Parameters

descr	in: descriptor
bit	in: XDES_FREE_BIT or XDES_CLEAN_BIT
val	in: desired bit value
hint	in: hint of which bit position would be desirable
mtr	in/out: mini-transaction

Definition at line 271 of file fsp0fsp.cc.

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UNIV_INLINE ulint xdes_find_bit_downward	(	xdes_t *	descr,
		ulint	bit,
		ibool	val,
		ulint	hint,
		mtr_t *	mtr
	)

Looks for a descriptor bit having the desired value. Scans the extent in a direction opposite to xdes_find_bit.

Returns

bit index of the bit, ULINT_UNDEFINED if not found

Parameters

descr	in: descriptor
bit	in: XDES_FREE_BIT or XDES_CLEAN_BIT
val	in: desired bit value
hint	in: hint of which bit position would be desirable
mtr	in/out: mini-transaction

Definition at line 309 of file fsp0fsp.cc.

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UNIV_INLINE ulint xdes_get_n_used	(	const xdes_t *	descr,
		mtr_t *	mtr
	)

Returns the number of used pages in a descriptor.

Returns

number of pages used

Parameters

descr	in: descriptor
mtr	in/out: mini-transaction

Definition at line 346 of file fsp0fsp.cc.

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UNIV_INLINE ulint xdes_get_state	(	const xdes_t *	descr,
		mtr_t *	mtr
	)

Gets the state of an xdes.

Returns

state

Parameters

descr	in: descriptor
mtr	in/out: mini-transaction

Definition at line 423 of file fsp0fsp.cc.

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UNIV_INLINE void xdes_init	(	xdes_t *	descr,
		mtr_t *	mtr
	)

Inits an extent descriptor to the free and clean state.

Parameters

descr	in: descriptor
mtr	in/out: mini-transaction

Definition at line 442 of file fsp0fsp.cc.

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UNIV_INLINE ibool xdes_is_free	(	const xdes_t *	descr,
		mtr_t *	mtr
	)

Returns true if extent contains no used pages.

Returns

TRUE if totally free

Parameters

descr	in: descriptor
mtr	in/out: mini-transaction

Definition at line 369 of file fsp0fsp.cc.

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UNIV_INLINE ibool xdes_is_full	(	const xdes_t *	descr,
		mtr_t *	mtr
	)

Returns true if extent contains no free pages.

Returns

TRUE if full

Parameters

descr	in: descriptor
mtr	in/out: mini-transaction

Definition at line 387 of file fsp0fsp.cc.

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UNIV_INLINE ibool xdes_mtr_get_bit	(	const xdes_t *	descr,
		ulint	bit,
		ulint	offset,
		mtr_t *	mtr
	)

Gets a descriptor bit of a page.

Returns

TRUE if free

Parameters

descr	in: descriptor
bit	in: XDES_FREE_BIT or XDES_CLEAN_BIT
offset	in: page offset within extent: 0 ... FSP_EXTENT_SIZE - 1
mtr	in: mini-transaction

Definition at line 215 of file fsp0fsp.cc.

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UNIV_INLINE void xdes_set_bit	(	xdes_t *	descr,
		ulint	bit,
		ulint	offset,
		ibool	val,
		mtr_t *	mtr
	)

Sets a descriptor bit of a page.

Parameters

descr	in: descriptor
bit	in: XDES_FREE_BIT or XDES_CLEAN_BIT
offset	in: page offset within extent: 0 ... FSP_EXTENT_SIZE - 1
val	in: bit value
mtr	in/out: mini-transaction

Definition at line 233 of file fsp0fsp.cc.

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UNIV_INLINE void xdes_set_state	(	xdes_t *	descr,
		ulint	state,
		mtr_t *	mtr
	)

Sets the state of an xdes.

Parameters

descr	in/out: descriptor
state	in: state to set
mtr	in/out: mini-transaction

Definition at line 404 of file fsp0fsp.cc.

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Variable Documentation

ulint xdes_t* descr

in: extent descriptor

Definition at line 101 of file fsp0fsp.cc.

limit = mach_read_from_4(sp_header + FSP_FREE_LIMIT)

< in/out: mini-transaction

Definition at line 472 of file fsp0fsp.cc.

ulint xdes_t mtr_t* mtr

in/out: mini-transaction

Definition at line 101 of file fsp0fsp.cc.

ulint ulint offset

in: page offset; if equal to the free limit, we try to add new extents to the space free list

Definition at line 472 of file fsp0fsp.cc.

ulint page

< in: segment inode in: page offset

Definition at line 101 of file fsp0fsp.cc.

UNIV_INLINE ulint space

< in/out: space header, x-latched in mtr in: space id

Definition at line 472 of file fsp0fsp.cc.

ulint zip_size

Initial value:

 fsp_flags_get_zip_size(
                mach_read_from_4(sp_header + FSP_SPACE_FLAGS))

< in: space id in: compressed page size in bytes or 0 for uncompressed pages

Definition at line 481 of file fsp0fsp.cc.