Public Member Functions
	Fil_shard (size_t shard_id)
	Constructor. More...

	~Fil_shard ()
	Destructor. More...

size_t	id () const

void	acquire (int line) const
	Acquire the mutex. More...

void	mutex_release () const
	Release the mutex. More...

bool	mutex_owned () const

bool	space_acquire (fil_space_t *space)
	Acquire a tablespace to prevent it from being dropped concurrently. More...

void	space_release (fil_space_t *space)
	Release a tablespace acquired with Fil_shard::space_acquire(). More...

fil_space_t *	get_space_by_id_from_map (space_id_t space_id) const
	Fetch the fil_space_t instance that maps to space_id. More...

fil_space_t *	get_space_by_id (space_id_t space_id) const
	Fetch the fil_space_t instance that maps to space_id. More...

fil_space_t *	get_space_by_name (const char *name) const
	Fetch the fil_space_t instance that maps to the name. More...

bool	close_files_in_LRU ()
	Tries to close a file in the shard LRU list. More...

void	remove_from_LRU (fil_node_t *file)
	Remove the file node from the LRU list. More...

void	add_to_lru_if_needed (fil_node_t *file)
	Add the file node to the LRU list if required. More...

void	open_system_tablespaces (size_t max_n_open, size_t *n_open)
	Open all the system files. More...

void	close_file (fil_node_t *file)
	Close a tablespace file. More...

bool	close_file (space_id_t space_id)
	Close a tablespace file based on tablespace ID. More...

void	file_close_to_free (fil_node_t file, fil_space_t space)
	Prepare to free a file object from a tablespace memory cache. More...

void	close_all_files ()
	Close all open files. More...

void	validate_space_reference_count (Space_References &buffer_pool_references)
	Check that each fil_space_t::m_n_ref_count in this shard matches the number of pages counted in the buffer pool. More...

bool	needs_encryption_rotate (fil_space_t *space)
	Determine if the tablespace needs encryption rotation. More...

size_t	encryption_rotate (size_t *rotate_count)
	Rotate the tablespace keys by new master key. More...

void	space_detach (fil_space_t *space)
	Detach a space object from the tablespace memory cache and closes the tablespace files but does not delete them. More...

void	space_remove_from_lookup_maps (space_id_t space_id)
	Remove the fil_space_t instance from the maps used to search for it. More...

void	space_prepare_for_delete (fil_space_t *space) noexcept
	Move the space to the deleted list and remove from the default lookup set. More...

void	purge ()
	Purge entries from m_deleted_spaces that are no longer referenced by a buffer pool page. More...

size_t	count_undo_deleted (space_id_t undo_num) noexcept
	Count how many truncated undo space IDs are still tracked in the buffer pool and the file_system cache. More...

bool	is_deleted (space_id_t space_id)
	Check if a particular space_id for a page in the buffer pool has been deleted recently. More...

fil_space_t *	space_free (space_id_t space_id)
	Frees a space object from the tablespace memory cache. More...

void	space_add (fil_space_t *space)
	Map the space ID and name to the tablespace instance. More...

void	prepare_to_free_file (fil_node_t *file)
	Prepare to free a file. More...

void	remove_from_unflushed_list (fil_space_t *space)
	If the tablespace is on the unflushed list and there are no pending flushes then remove from the unflushed list. More...

void	complete_io (fil_node_t *file, const IORequest &type)
	Updates the data structures when an I/O operation finishes. More...

bool	prepare_file_for_io (fil_node_t *file)
	Prepares a file for I/O. More...

void	update_space_name_map (fil_space_t space, const char new_name)
	Remap the tablespace to the new name. More...

void	flush_file_spaces ()
	Flush to disk the writes in file spaces possibly cached by the OS (note: spaces of type FIL_TYPE_TEMPORARY are skipped) More...

bool	space_extend (fil_space_t *space, page_no_t size)
	Try to extend a tablespace if it is smaller than the specified size. More...

void	space_flush (space_id_t space_id)
	Flushes to disk possible writes cached by the OS. More...

bool	open_file (fil_node_t *file)
	Open a file of a tablespace. More...

bool	space_is_flushed (const fil_space_t *space)
	Checks if all the file nodes in a space are flushed. More...

bool	space_open (space_id_t space_id)
	Open each file of a tablespace if not already open. More...

fil_space_t *	space_load (space_id_t space_id)
	Opens the files associated with a tablespace and returns a pointer to the fil_space_t that is in the memory cache associated with a space id. More...

dberr_t	wait_for_pending_operations (space_id_t space_id, fil_space_t &space, char *path) const
	Wait for pending operations on a tablespace to stop. More...

dberr_t	space_rename (space_id_t space_id, const char old_path, const char new_name, const char *new_path_in)
	Rename a single-table tablespace. More...

dberr_t	space_delete (space_id_t space_id, buf_remove_t buf_remove)
	Deletes an IBD or IBU tablespace. More...

bool	space_truncate (space_id_t space_id, page_no_t size_in_pages)
	Truncate the tablespace to needed size. More...

fil_space_t *	space_create (const char *name, space_id_t space_id, uint32_t flags, fil_type_t purpose)
	Create a space memory object and put it to the fil_system hash table. More...

bool	adjust_space_name (fil_space_t space, const char dd_space_name)
	Adjust temporary auto-generated names created during file discovery with correct tablespace names from the DD. More...

bool	space_check_exists (space_id_t space_id, const char *name, bool print_err, bool adjust_space)
	Returns true if a matching tablespace exists in the InnoDB tablespace memory cache. More...

dberr_t	do_io (const IORequest &type, bool sync, const page_id_t &page_id, const page_size_t &page_size, ulint byte_offset, ulint len, void buf, void message)
	Read or write data. More...

dberr_t	iterate (Fil_iterator::Function &f)
	Iterate through all persistent tablespace files (FIL_TYPE_TABLESPACE) returning the nodes via callback function f. More...

fil_load_status	ibd_open_for_recovery (space_id_t space_id, const std::string &path, fil_space_t *&space)
	Open an ibd tablespace and add it to the InnoDB data structures. More...

fil_node_t *	create_node (const char name, page_no_t size, fil_space_t space, bool is_raw, bool punch_hole, page_no_t max_pages=PAGE_NO_MAX)
	Attach a file to a tablespace. More...

void	validate () const
	Validate a shard. More...

Static Public Member Functions
static void	space_free_low (fil_space_t *&space)
	Free a tablespace object on which fil_space_detach() was invoked. More...

Private Types
using	File_list = UT_LIST_BASE_NODE_T(fil_node_t, LRU)

using	Space_list = UT_LIST_BASE_NODE_T(fil_space_t, unflushed_spaces)

using	Spaces = std::unordered_map< space_id_t, fil_space_t * >

using	Names = std::unordered_map< const char , fil_space_t , Char_Ptr_Hash, Char_Ptr_Compare >

using	Pair = std::pair< space_id_t, fil_space_t * >

using	Deleted_spaces = std::vector< Pair, ut::allocator< Pair > >

Private Member Functions
fil_space_t *	get_reserved_space (space_id_t space_id)
	We keep system tablespace files always open; this is important in preventing deadlocks in this module, as a page read completion often performs another read from the insert buffer. More...

dberr_t	space_prepare_for_truncate (space_id_t space_id, fil_space_t *&space)
	Prepare for truncating a single-table tablespace. More...

void	write_completed (fil_node_t *file)
	Note that a write IO has completed. More...

void	add_to_unflushed_list (fil_space_t *space)
	If the tablespace is not on the unflushed list, add it. More...

ulint	space_check_pending_operations (fil_space_t *space, ulint count) const
	Check for pending operations. More...

ulint	check_pending_io (const fil_space_t *space, const fil_node_t &file, ulint count) const
	Check for pending IO. More...

dberr_t	get_file_size (fil_node_t *file, bool read_only_mode)
	First we open the file in the normal mode, no async I/O here, for simplicity. More...

	Fil_shard (Fil_shard &&)=delete

	Fil_shard (const Fil_shard &)=delete

Fil_shard &	operator= (Fil_shard &&)=delete

Fil_shard &	operator= (const Fil_shard &)=delete

Static Private Member Functions
static AIO_mode	get_AIO_mode (const IORequest &req_type, bool sync)
	Get the AIO mode. More...

static dberr_t	get_file_for_io (fil_space_t space, page_no_t page_no, fil_node_t *&file)
	Get the file name for IO and the local offset within that file. More...

Private Attributes
const size_t	m_id
	Fil_shard ID. More...

Spaces	m_spaces
	Tablespace instances hashed on the space id. More...

Names	m_names
	Tablespace instances hashed on the space name. More...

Deleted_spaces	m_deleted_spaces
	Deleted tablespaces. More...

File_list	m_LRU
	Base node for the LRU list of the most recently used open files with no pending I/O's; if we start an I/O on the file, we first remove it from this list, and return it to the start of the list when the I/O ends; the system tablespace file is not put to this list: it is opened after the startup, and kept open until shutdown. More...

Space_list	m_unflushed_spaces
	Base node for the list of those tablespaces whose files contain unflushed writes; those spaces have at least one file where modification_counter > flush_counter. More...

int64_t	m_modification_counter
	When we write to a file we increment this by one. More...

ib_mutex_t	m_mutex
	Mutex protecting this shard. More...

Friends
class	Fil_system

Member Typedef Documentation

◆ Deleted_spaces

using Fil_shard::Deleted_spaces = std::vector<Pair, ut::allocator<Pair> >

private

◆ File_list

using Fil_shard::File_list = UT_LIST_BASE_NODE_T(fil_node_t, LRU)

private

◆ Names

using Fil_shard::Names = std::unordered_map<const char *, fil_space_t *, Char_Ptr_Hash, Char_Ptr_Compare>

private

◆ Pair

using Fil_shard::Pair = std::pair<space_id_t, fil_space_t *>

private

◆ Space_list

using Fil_shard::Space_list = UT_LIST_BASE_NODE_T(fil_space_t, unflushed_spaces)

private

◆ Spaces

using Fil_shard::Spaces = std::unordered_map<space_id_t, fil_space_t *>

private

Constructor & Destructor Documentation

◆ Fil_shard() [1/3]

Fil_shard::Fil_shard ( size_t shard_id )

explicit

Constructor.

Parameters

[in] shard_id Shard ID

◆ ~Fil_shard()

Fil_shard::~Fil_shard ( )

inline

Destructor.

◆ Fil_shard() [2/3]

Fil_shard::Fil_shard ( Fil_shard && )

privatedelete

◆ Fil_shard() [3/3]

Fil_shard::Fil_shard ( const Fil_shard & )

privatedelete

Member Function Documentation

◆ acquire()

void Fil_shard::acquire ( int line ) const

inline

Acquire the mutex.

Parameters

[in] line Line number from where it was called

◆ add_to_lru_if_needed()

void Fil_shard::add_to_lru_if_needed ( fil_node_t * file )

Add the file node to the LRU list if required.

Parameters

[in,out] file File for the tablespace

◆ add_to_unflushed_list()

void Fil_shard::add_to_unflushed_list ( fil_space_t * space )

private

If the tablespace is not on the unflushed list, add it.

Parameters

[in,out] space Tablespace to add

◆ adjust_space_name()

bool Fil_shard::adjust_space_name	(	fil_space_t *	space,
		const char *	dd_space_name
	)

Adjust temporary auto-generated names created during file discovery with correct tablespace names from the DD.

Parameters

[in,out]	space	Tablespace
[in]	dd_space_name	Tablespace name from the DD

Returns: true if the tablespace is a general or undo tablespace.

◆ check_pending_io()

ulint Fil_shard::check_pending_io	(	const fil_space_t *	space,
		const fil_node_t &	file,
		ulint	count
	)		const

private

Check for pending IO.

Parameters

[in]	space	Tablespace to check
[in]	file	File in space list
[in]	count	number of attempts so far

Returns: 0 if no pending else count + 1.

◆ close_all_files()

void Fil_shard::close_all_files ( )

Close all open files.

◆ close_file() [1/2]

void Fil_shard::close_file ( fil_node_t * file )

Close a tablespace file.

Parameters

[in,out] file Tablespace file to close

◆ close_file() [2/2]

bool Fil_shard::close_file ( space_id_t space_id )

Close a tablespace file based on tablespace ID.

Parameters

[in] space_id Tablespace ID

Returns: false if space_id was not found.

◆ close_files_in_LRU()

bool Fil_shard::close_files_in_LRU ( )

Tries to close a file in the shard LRU list.

The caller must hold the Fil_shard::m_mutex.

Returns: true if success, false if should retry later

◆ complete_io()

void Fil_shard::complete_io	(	fil_node_t *	file,
		const IORequest &	type
	)

Updates the data structures when an I/O operation finishes.

Updates the pending I/O's field in the file appropriately.

Parameters

[in]	file	Tablespace file
[in]	type	Marks the file as modified type == WRITE

◆ count_undo_deleted()

size_t Fil_shard::count_undo_deleted ( space_id_t undo_num )

inlinenoexcept

Count how many truncated undo space IDs are still tracked in the buffer pool and the file_system cache.

Parameters

[in] undo_num undo tablespace number.

Returns: number of undo tablespaces that are still in memory.

◆ create_node()

fil_node_t * Fil_shard::create_node	(	const char *	name,
		page_no_t	size,
		fil_space_t *	space,
		bool	is_raw,
		bool	punch_hole,
		page_no_t	max_pages = `PAGE_NO_MAX`
	)

Attach a file to a tablespace.

Parameters

[in]	name	file name of a file that is not open
[in]	size	file size in entire database blocks
[in,out]	space	tablespace from fil_space_create()
[in]	is_raw	whether this is a raw device or partition
[in]	punch_hole	true if supported for this file
[in]	max_pages	maximum number of pages in file

Returns: pointer to the file name

Return values

nullptr if error

◆ do_io()

dberr_t Fil_shard::do_io	(	const IORequest &	type,
		bool	sync,
		const page_id_t &	page_id,
		const page_size_t &	page_size,
		ulint	byte_offset,
		ulint	len,
		void *	buf,
		void *	message
	)

Read or write data.

This operation could be asynchronous (aio).

Parameters

[in]	type	IO context
[in]	sync	whether synchronous aio is desired
[in]	page_id	page id
[in]	page_size	page size
[in]	byte_offset	remainder of offset in bytes; in AIO this must be divisible by the OS block size
[in]	len	how many bytes to read or write; this must not cross a file boundary; in AIO this must be a block size multiple
[in,out]	buf	buffer where to store read data or from where to write; in AIO this must be appropriately aligned
[in]	message	message for AIO handler if !sync, else ignored

Returns: error code

Return values

DB_SUCCESS	on success
DB_TABLESPACE_DELETED	if the tablespace does not exist

◆ encryption_rotate()

size_t Fil_shard::encryption_rotate ( size_t * rotate_count )

Rotate the tablespace keys by new master key.

Parameters

[in,out] rotate_count A cumulative count of all tablespaces rotated in the Fil_system.

Returns: the number of tablespaces that failed to rotate.

◆ file_close_to_free()

void Fil_shard::file_close_to_free	(	fil_node_t *	file,
		fil_space_t *	space
	)

Prepare to free a file object from a tablespace memory cache.

Parameters

[in,out]	file	Tablespace file
[in]	space	tablespace

◆ flush_file_spaces()

void Fil_shard::flush_file_spaces ( )

Flush to disk the writes in file spaces possibly cached by the OS (note: spaces of type FIL_TYPE_TEMPORARY are skipped)

◆ get_AIO_mode()

AIO_mode Fil_shard::get_AIO_mode	(	const IORequest &	req_type,
		bool	sync
	)

staticprivate

Get the AIO mode.

Parameters

[in]	req_type	IO request type
[in]	sync	true if Synchronous IO return the AIO mode

◆ get_file_for_io()

dberr_t Fil_shard::get_file_for_io	(	fil_space_t *	space,
		page_no_t *	page_no,
		fil_node_t *&	file
	)

staticprivate

Get the file name for IO and the local offset within that file.

Parameters

[in,out]	space	Tablespace for IO
[in,out]	page_no	The relative page number in the file
[out]	file	File node if DB_SUCCESS, NULL if not

Return values

DB_SUCCESS	if the file is found with the page_no
DB_ERROR	if the file is not found or does not contain the page. in this case file == nullptr

◆ get_file_size()

dberr_t Fil_shard::get_file_size	(	fil_node_t *	file,
		bool	read_only_mode
	)

private

First we open the file in the normal mode, no async I/O here, for simplicity.

Then do some checks, and close the file again. NOTE that we could not use the simple file read function os_file_read() in Windows to read from a file opened for async I/O!

Parameters

[in,out]	file	Get the size of this file
[in]	read_only_mode	true if read only mode set

Returns: DB_SUCCESS or error

Add some tolerance when the tablespace is upgraded. If an empty general tablespace is created in 5.7, and then upgraded to 8.0, then its size changes from FIL_IBD_FILE_INITIAL_SIZE_5_7 pages to FIL_IBD_FILE_INITIAL_SIZE-1.

◆ get_reserved_space()

fil_space_t * Fil_shard::get_reserved_space ( space_id_t space_id )

private

We keep system tablespace files always open; this is important in preventing deadlocks in this module, as a page read completion often performs another read from the insert buffer.

The insert buffer is in tablespace TRX_SYS_SPACE, and we cannot end up waiting in this function.

Parameters

[in] space_id Tablespace ID to look up

Returns: tablespace instance

◆ get_space_by_id()

fil_space_t * Fil_shard::get_space_by_id ( space_id_t space_id ) const

Fetch the fil_space_t instance that maps to space_id.

Parameters

[in] space_id Tablespace ID to lookup

Returns: tablespace instance or nullptr if not found.

◆ get_space_by_id_from_map()

fil_space_t * Fil_shard::get_space_by_id_from_map ( space_id_t space_id ) const

inline

Fetch the fil_space_t instance that maps to space_id.

Does not look through system reserved spaces.

Parameters

[in] space_id Tablespace ID to lookup

Returns: tablespace instance or nullptr if not found.

◆ get_space_by_name()

fil_space_t * Fil_shard::get_space_by_name ( const char * name ) const

inline

Fetch the fil_space_t instance that maps to the name.

Parameters

[in] name Tablespace name to lookup

Returns: tablespace instance or nullptr if not found.

◆ ibd_open_for_recovery()

fil_load_status Fil_shard::ibd_open_for_recovery	(	space_id_t	space_id,
		const std::string &	path,
		fil_space_t *&	space
	)

Open an ibd tablespace and add it to the InnoDB data structures.

This is similar to fil_ibd_open() except that it is used while processing the redo and DDL log, so the data dictionary is not available and very little validation is done. The tablespace name is extracted from the dbname/tablename.ibd portion of the filename, which assumes that the file is a file-per-table tablespace. Any name will do for now. General tablespace names will be read from the dictionary after it has been recovered. The tablespace flags are read at this time from the first page of the file in validate_for_recovery().

Parameters

[in]	space_id	tablespace ID
[in]	path	path/to/databasename/tablename.ibd
[out]	space	the tablespace, or nullptr on error

Returns: status of the operation

◆ id()

size_t Fil_shard::id ( ) const

inline

Returns: the shard ID

◆ is_deleted()

bool Fil_shard::is_deleted ( space_id_t space_id )

inline

Check if a particular space_id for a page in the buffer pool has been deleted recently.

Its space_id will be found in m_deleted_spaces until Fil:shard::checkpoint removes the fil_space_t from Fil_system.

Parameters

[in] space_id Tablespace ID to check.

Returns: true if this space_id is in the list of recently deleted spaces.

◆ iterate()

dberr_t Fil_shard::iterate ( Fil_iterator::Function & f )

Iterate through all persistent tablespace files (FIL_TYPE_TABLESPACE) returning the nodes via callback function f.

Iterate through all persistent tablespace files (FIL_TYPE_TABLESPACE) returning the nodes via callback function cbk.

Parameters

[in] f Callback

Returns: any error returned by the callback function.

◆ mutex_owned()

bool Fil_shard::mutex_owned ( ) const

inline

Returns: true if the mutex is owned.

◆ mutex_release()

void Fil_shard::mutex_release ( ) const

inline

Release the mutex.

◆ needs_encryption_rotate()

bool Fil_shard::needs_encryption_rotate ( fil_space_t * space )

Determine if the tablespace needs encryption rotation.

Parameters

[in] space tablespace to rotate

Returns: true if the tablespace needs to be rotated, false if not.

◆ open_file()

bool Fil_shard::open_file ( fil_node_t * file )

Open a file of a tablespace.

The caller must own the shard mutex.

Parameters

[in,out] file Tablespace file

Returns: false if the file can't be opened, otherwise true

◆ open_system_tablespaces()

void Fil_shard::open_system_tablespaces	(	size_t	max_n_open,
		size_t *	n_open
	)

Open all the system files.

Parameters

[in]	max_n_open	Maximum number of open files allowed
[in,out]	n_open	Current number of open files

◆ operator=() [1/2]

Fil_shard & Fil_shard::operator= ( const Fil_shard & )

privatedelete

◆ operator=() [2/2]

Fil_shard & Fil_shard::operator= ( Fil_shard && )

privatedelete

◆ prepare_file_for_io()

bool Fil_shard::prepare_file_for_io ( fil_node_t * file )

Prepares a file for I/O.

Opens the file if it is closed. Updates the pending I/O's field in the file and the system appropriately. Takes the file off the LRU list if it is in the LRU list.

Parameters

[in] file Tablespace file for IO

Returns: false if the file can't be opened, otherwise true

◆ prepare_to_free_file()

void Fil_shard::prepare_to_free_file ( fil_node_t * file )

Prepare to free a file.

Remove from the unflushed list if there are no pending flushes.

Parameters

[in,out] file File instance to free

◆ purge()

void Fil_shard::purge ( )

inline

Purge entries from m_deleted_spaces that are no longer referenced by a buffer pool page.

This is no longer required to be done during checkpoint - this is done here for historical reasons - it has to be done periodically somewhere.

◆ remove_from_LRU()

void Fil_shard::remove_from_LRU ( fil_node_t * file )

Remove the file node from the LRU list.

Parameters

[in,out] file File for the tablespace

◆ remove_from_unflushed_list()

void Fil_shard::remove_from_unflushed_list ( fil_space_t * space )

If the tablespace is on the unflushed list and there are no pending flushes then remove from the unflushed list.

Parameters

[in,out] space Tablespace to remove

◆ space_acquire()

bool Fil_shard::space_acquire ( fil_space_t * space )

inline

Acquire a tablespace to prevent it from being dropped concurrently.

The thread must call Fil_shard::fil_space_release() when the operation is done.

Parameters

[in] space tablespace to acquire

Returns: true if not space->stop_new_ops

◆ space_add()

void Fil_shard::space_add ( fil_space_t * space )

Map the space ID and name to the tablespace instance.

Parameters

[in] space Tablespace instance

◆ space_check_exists()

bool Fil_shard::space_check_exists	(	space_id_t	space_id,
		const char *	name,
		bool	print_err,
		bool	adjust_space
	)

Returns true if a matching tablespace exists in the InnoDB tablespace memory cache.

Parameters

[in]	space_id	Tablespace ID
[in]	name	Tablespace name used in fil_space_create().
[in]	print_err	Print detailed error information to the error log if a matching tablespace is not found from memory.
[in]	adjust_space	Whether to adjust space id on mismatch

Returns: true if a matching tablespace exists in the memory cache

◆ space_check_pending_operations()

ulint Fil_shard::space_check_pending_operations	(	fil_space_t *	space,
		ulint	count
	)		const

private

Check for pending operations.

Parameters

[in]	space	tablespace
[in]	count	number of attempts so far

Returns: 0 if no pending operations else count + 1.

◆ space_create()

fil_space_t * Fil_shard::space_create	(	const char *	name,
		space_id_t	space_id,
		uint32_t	flags,
		fil_type_t	purpose
	)

Create a space memory object and put it to the fil_system hash table.

The tablespace name is independent from the tablespace file-name. Error messages are issued to the server log.

Parameters

[in]	name	Tablespace name
[in]	space_id	Tablespace identifier
[in]	flags	Tablespace flags
[in]	purpose	Tablespace purpose

Returns: pointer to created tablespace, to be filled in with fil_node_create()

Return values

nullptr on failure (such as when the same tablespace exists)

◆ space_delete()

dberr_t Fil_shard::space_delete	(	space_id_t	space_id,
		buf_remove_t	buf_remove
	)

Deletes an IBD or IBU tablespace.

The tablespace must be cached in the memory cache. This will delete the datafile, fil_space_t & fil_node_t entries from the file_system_t cache.

Parameters

[in]	space_id	Tablespace ID
[in]	buf_remove	Specify the action to take on the pages for this table in the buffer pool.

Returns: DB_SUCCESS, DB_TABLESPCE_NOT_FOUND or DB_IO_ERROR

◆ space_detach()

void Fil_shard::space_detach ( fil_space_t * space )

Detach a space object from the tablespace memory cache and closes the tablespace files but does not delete them.

There must not be any pending I/O's or flushes on the files.

Parameters

[in,out] space tablespace

◆ space_extend()

bool Fil_shard::space_extend	(	fil_space_t *	space,
		page_no_t	size
	)

Try to extend a tablespace if it is smaller than the specified size.

Parameters

[in,out]	space	tablespace
[in]	size	desired size in pages

Returns: whether the tablespace is at least as big as requested

◆ space_flush()

void Fil_shard::space_flush ( space_id_t space_id )

Flushes to disk possible writes cached by the OS.

If the space does not exist or is being dropped, does not do anything.

Parameters

[in] space_id file space ID (id of tablespace of the database)

◆ space_free()

fil_space_t * Fil_shard::space_free ( space_id_t space_id )

Frees a space object from the tablespace memory cache.

Closes a tablespaces' files but does not delete them. There must not be any pending I/O's or flushes on the files.

Parameters

[in] space_id Tablespace ID

Returns: fil_space_t instance on success or nullptr

◆ space_free_low()

void Fil_shard::space_free_low ( fil_space_t *& space )

static

Free a tablespace object on which fil_space_detach() was invoked.

There must not be any pending I/O's or flushes on the files.

Parameters

[in,out] space tablespace

◆ space_is_flushed()

bool Fil_shard::space_is_flushed ( const fil_space_t * space )

Checks if all the file nodes in a space are flushed.

The caller must hold the fil_system mutex.

Parameters

[in] space Tablespace to check

Returns: true if all are flushed

◆ space_load()

fil_space_t * Fil_shard::space_load ( space_id_t space_id )

Opens the files associated with a tablespace and returns a pointer to the fil_space_t that is in the memory cache associated with a space id.

Open the files associated with a tablespace, make sure the size of the tablespace is read from the header page, and return a pointer to the fil_space_t that is in the memory cache associated with the given space id.

Parameters

[in] space_id Get the tablespace instance or this ID

Returns: file_space_t pointer, nullptr if space not found

◆ space_open()

bool Fil_shard::space_open ( space_id_t space_id )

Open each file of a tablespace if not already open.

Parameters

[in] space_id tablespace identifier

Return values

true	if all file nodes were opened
false	on failure

◆ space_prepare_for_delete()

void Fil_shard::space_prepare_for_delete ( fil_space_t * space )

inlinenoexcept

Move the space to the deleted list and remove from the default lookup set.

Parameters

[in,out] space Space instance to delete.

◆ space_prepare_for_truncate()

dberr_t Fil_shard::space_prepare_for_truncate	(	space_id_t	space_id,
		fil_space_t *&	space
	)

private

Prepare for truncating a single-table tablespace.

1) Wait for pending operations on the tablespace to stop; 2) Remove all insert buffer entries for the tablespace;

Parameters

[in]	space_id	Tablespace ID
[out]	space	Instance that maps to the space ID.

Returns: DB_SUCCESS or error

◆ space_release()

void Fil_shard::space_release ( fil_space_t * space )

Release a tablespace acquired with Fil_shard::space_acquire().

Parameters

[in,out] space tablespace to release

◆ space_remove_from_lookup_maps()

void Fil_shard::space_remove_from_lookup_maps ( space_id_t space_id )

inline

Remove the fil_space_t instance from the maps used to search for it.

Parameters

[in] space_id Tablespace ID to remove from maps.

◆ space_rename()

dberr_t Fil_shard::space_rename	(	space_id_t	space_id,
		const char *	old_path,
		const char *	new_name,
		const char *	new_path_in
	)

Rename a single-table tablespace.

The tablespace must exist in the memory cache.

Parameters

[in]	space_id	Tablespace ID
[in]	old_path	Old file name
[in]	new_name	New tablespace name in the schema/space
[in]	new_path_in	New file name, or nullptr if it is located in the normal data directory

Returns: InnoDB error code

◆ space_truncate()

bool Fil_shard::space_truncate	(	space_id_t	space_id,
		page_no_t	size_in_pages
	)

Truncate the tablespace to needed size.

Parameters

[in]	space_id	Tablespace ID to truncate
[in]	size_in_pages	Truncate size.

Returns: true if truncate was successful.

◆ update_space_name_map()

void Fil_shard::update_space_name_map	(	fil_space_t *	space,
		const char *	new_name
	)

Remap the tablespace to the new name.

Parameters

[in]	space	Tablespace instance, with old name.
[in]	new_name	New tablespace name

◆ validate()

void Fil_shard::validate ( ) const

Validate a shard.

◆ validate_space_reference_count()

void Fil_shard::validate_space_reference_count ( Space_References & buffer_pool_references )

Check that each fil_space_t::m_n_ref_count in this shard matches the number of pages counted in the buffer pool.

Parameters

[in] buffer_pool_references Map of spaces instances to the count of their pages in the buffer pool.

◆ wait_for_pending_operations()

dberr_t Fil_shard::wait_for_pending_operations	(	space_id_t	space_id,
		fil_space_t *&	space,
		char **	path
	)		const

Wait for pending operations on a tablespace to stop.

Parameters

[in]	space_id	Tablespace ID
[out]	space	tablespace instance in memory
[out]	path	tablespace path

Returns: DB_SUCCESS or DB_TABLESPACE_NOT_FOUND.

◆ write_completed()

void Fil_shard::write_completed ( fil_node_t * file )

private

Note that a write IO has completed.

Parameters

[in,out] file File on which a write was completed

Friends And Related Function Documentation

◆ Fil_system

friend class Fil_system

friend

Member Data Documentation

◆ m_deleted_spaces

Deleted_spaces Fil_shard::m_deleted_spaces

private

Deleted tablespaces.

All pages for these tablespaces in the buffer pool will be passively deleted. They need not be written. Once the reference count is zero, this fil_space_t can be deleted from m_deleted_spaces and removed from memory. All reads and writes must be done under the shard mutex.

◆ m_id

const size_t Fil_shard::m_id

private

Fil_shard ID.

◆ m_LRU

File_list Fil_shard::m_LRU

private

Base node for the LRU list of the most recently used open files with no pending I/O's; if we start an I/O on the file, we first remove it from this list, and return it to the start of the list when the I/O ends; the system tablespace file is not put to this list: it is opened after the startup, and kept open until shutdown.

◆ m_modification_counter

int64_t Fil_shard::m_modification_counter

private

When we write to a file we increment this by one.

◆ m_mutex

ib_mutex_t Fil_shard::m_mutex

mutableprivate

Mutex protecting this shard.

◆ m_names

Names Fil_shard::m_names

private

Tablespace instances hashed on the space name.

◆ m_spaces

Spaces Fil_shard::m_spaces

private

Tablespace instances hashed on the space id.

◆ m_unflushed_spaces

Space_list Fil_shard::m_unflushed_spaces

private

Base node for the list of those tablespaces whose files contain unflushed writes; those spaces have at least one file where modification_counter > flush_counter.

The documentation for this class was generated from the following file:

storage/innobase/fil/fil0fil.cc

Public Member Functions

Static Public Member Functions

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Friends

Member Typedef Documentation

◆ Deleted_spaces

◆ File_list

◆ Names

◆ Pair

◆ Space_list

◆ Spaces

Constructor & Destructor Documentation

◆ Fil_shard() [1/3]

◆ ~Fil_shard()

◆ Fil_shard() [2/3]

◆ Fil_shard() [3/3]

Member Function Documentation

◆ acquire()

◆ add_to_lru_if_needed()

◆ add_to_unflushed_list()

◆ adjust_space_name()

◆ check_pending_io()

◆ close_all_files()

◆ close_file() [1/2]

◆ close_file() [2/2]

◆ close_files_in_LRU()

◆ complete_io()

◆ count_undo_deleted()

◆ create_node()

◆ do_io()

◆ encryption_rotate()

◆ file_close_to_free()

◆ flush_file_spaces()

◆ get_AIO_mode()

◆ get_file_for_io()

◆ get_file_size()

◆ get_reserved_space()

◆ get_space_by_id()

◆ get_space_by_id_from_map()

◆ get_space_by_name()

◆ ibd_open_for_recovery()

◆ id()

◆ is_deleted()

◆ iterate()

◆ mutex_owned()

◆ mutex_release()

◆ needs_encryption_rotate()

◆ open_file()

◆ open_system_tablespaces()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ prepare_file_for_io()

◆ prepare_to_free_file()

◆ purge()

◆ remove_from_LRU()

◆ remove_from_unflushed_list()

◆ space_acquire()

◆ space_add()

◆ space_check_exists()

◆ space_check_pending_operations()

◆ space_create()

◆ space_delete()

◆ space_detach()

◆ space_extend()

◆ space_flush()

◆ space_free()

◆ space_free_low()

◆ space_is_flushed()

◆ space_load()

◆ space_open()

◆ space_prepare_for_delete()

◆ space_prepare_for_truncate()

◆ space_release()

◆ space_remove_from_lookup_maps()

◆ space_rename()

◆ space_truncate()

◆ update_space_name_map()