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mariadb/storage/innobase/fil/fil0fil.cc
Sergei Golubchik ed008a74cf Make atomic writes general 
- Atomic writes are enabled by default
- Automatically detect if device supports atomic write and use it if
  atomic writes are enabled
- Remove ATOMIC WRITE options from CREATE TABLE
  - Atomic write is a device option, not a table options as the table may
    crash if the media changes
- Add support for SHANNON SSD cards
2017-01-11 09:18:35 +02:00

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/*****************************************************************************
Copyright (c) 1995, 2016, Oracle and/or its affiliates.
Copyright (c) 2013, 2017, MariaDB Corporation.
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.,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/**************************************************//**
@file fil/fil0fil.cc
The tablespace memory cache
Created 10/25/1995 Heikki Tuuri
*******************************************************/
#include "ha_prototypes.h"
#include "fil0pagecompress.h"
#include "fsp0pagecompress.h"
#include "fil0crypt.h"
#include "btr0btr.h"
#include "buf0buf.h"
#include "dict0boot.h"
#include "dict0dict.h"
#include "fsp0file.h"
#include "fsp0file.h"
#include "fsp0fsp.h"
#include "fsp0space.h"
#include "fsp0sysspace.h"
#include "hash0hash.h"
#include "log0recv.h"
#include "mach0data.h"
#include "mem0mem.h"
#include "mtr0log.h"
#include "os0file.h"
#include "page0zip.h"
#include "row0mysql.h"
#include "row0trunc.h"
#include "srv0start.h"
#include "trx0purge.h"
#include "ut0new.h"
#include "buf0lru.h"
#include "ibuf0ibuf.h"
#include "os0event.h"
#include "sync0sync.h"
#include "buf0flu.h"
#include "srv0start.h"
#include "trx0purge.h"
#include "ut0new.h"
/** Tries to close a file in the LRU list. The caller must hold the fil_sys
mutex.
@return true if success, false if should retry later; since i/o's
generally complete in < 100 ms, and as InnoDB writes at most 128 pages
from the buffer pool in a batch, and then immediately flushes the
files, there is a good chance that the next time we find a suitable
node from the LRU list.
@param[in] print_info if true, prints information why it
cannot close a file */
static
bool
fil_try_to_close_file_in_LRU(bool print_info);
/*
IMPLEMENTATION OF THE TABLESPACE MEMORY CACHE
=============================================
The tablespace cache is responsible for providing fast read/write access to
tablespaces and logs of the database. File creation and deletion is done
in other modules which know more of the logic of the operation, however.
A tablespace consists of a chain of files. The size of the files does not
have to be divisible by the database block size, because we may just leave
the last incomplete block unused. When a new file is appended to the
tablespace, the maximum size of the file is also specified. At the moment,
we think that it is best to extend the file to its maximum size already at
the creation of the file, because then we can avoid dynamically extending
the file when more space is needed for the tablespace.
A block's position in the tablespace is specified with a 32-bit unsigned
integer. The files in the chain are thought to be catenated, and the block
corresponding to an address n is the nth block in the catenated file (where
the first block is named the 0th block, and the incomplete block fragments
at the end of files are not taken into account). A tablespace can be extended
by appending a new file at the end of the chain.
Our tablespace concept is similar to the one of Oracle.
To acquire more speed in disk transfers, a technique called disk striping is
sometimes used. This means that logical block addresses are divided in a
round-robin fashion across several disks. Windows NT supports disk striping,
so there we do not need to support it in the database. Disk striping is
implemented in hardware in RAID disks. We conclude that it is not necessary
to implement it in the database. Oracle 7 does not support disk striping,
either.
Another trick used at some database sites is replacing tablespace files by
raw disks, that is, the whole physical disk drive, or a partition of it, is
opened as a single file, and it is accessed through byte offsets calculated
from the start of the disk or the partition. This is recommended in some
books on database tuning to achieve more speed in i/o. Using raw disk
certainly prevents the OS from fragmenting disk space, but it is not clear
if it really adds speed. We measured on the Pentium 100 MHz + NT + NTFS file
system + EIDE Conner disk only a negligible difference in speed when reading
from a file, versus reading from a raw disk.
To have fast access to a tablespace or a log file, we put the data structures
to a hash table. Each tablespace and log file is given an unique 32-bit
identifier.
Some operating systems do not support many open files at the same time,
though NT seems to tolerate at least 900 open files. Therefore, we put the
open files in an LRU-list. If we need to open another file, we may close the
file at the end of the LRU-list. When an i/o-operation is pending on a file,
the file cannot be closed. We take the file nodes with pending i/o-operations
out of the LRU-list and keep a count of pending operations. When an operation
completes, we decrement the count and return the file node to the LRU-list if
the count drops to zero. */
/** This tablespace name is used internally during recovery to open a
general tablespace before the data dictionary are recovered and available. */
const char general_space_name[] = "innodb_general";
/** Reference to the server data directory. Usually it is the
current working directory ".", but in the MySQL Embedded Server Library
it is an absolute path. */
const char* fil_path_to_mysql_datadir;
Folder folder_mysql_datadir;
/** Common InnoDB file extentions */
const char* dot_ext[] = { "", ".ibd", ".isl", ".cfg", ".cfp" };
/** The number of fsyncs done to the log */
ulint fil_n_log_flushes = 0;
/** Number of pending redo log flushes */
ulint fil_n_pending_log_flushes = 0;
/** Number of pending tablespace flushes */
ulint fil_n_pending_tablespace_flushes = 0;
/** Number of files currently open */
ulint fil_n_file_opened = 0;
/** The null file address */
fil_addr_t fil_addr_null = {FIL_NULL, 0};
/** The tablespace memory cache. This variable is NULL before the module is
initialized. */
fil_system_t* fil_system = NULL;
/** Determine if user has explicitly disabled fsync(). */
#ifndef _WIN32
# define fil_buffering_disabled(s) \
((s)->purpose == FIL_TYPE_TABLESPACE \
&& srv_unix_file_flush_method \
== SRV_UNIX_O_DIRECT_NO_FSYNC)
#else /* _WIN32 */
# define fil_buffering_disabled(s) (0)
#endif /* __WIN32 */
/** Determine if the space id is a user tablespace id or not.
@param[in] space_id Space ID to check
@return true if it is a user tablespace ID */
UNIV_INLINE
bool
fil_is_user_tablespace_id(
ulint space_id)
{
return(space_id > srv_undo_tablespaces_open
&& space_id != SRV_TMP_SPACE_ID);
}
#ifdef UNIV_DEBUG
/** Try fil_validate() every this many times */
# define FIL_VALIDATE_SKIP 17
/******************************************************************//**
Checks the consistency of the tablespace cache some of the time.
@return true if ok or the check was skipped */
static
bool
fil_validate_skip(void)
/*===================*/
{
/** The fil_validate() call skip counter. Use a signed type
because of the race condition below. */
static int fil_validate_count = FIL_VALIDATE_SKIP;
/* There is a race condition below, but it does not matter,
because this call is only for heuristic purposes. We want to
reduce the call frequency of the costly fil_validate() check
in debug builds. */
if (--fil_validate_count > 0) {
return(true);
}
fil_validate_count = FIL_VALIDATE_SKIP;
return(fil_validate());
}
#endif /* UNIV_DEBUG */
/********************************************************************//**
Determines if a file node belongs to the least-recently-used list.
@return true if the file belongs to fil_system->LRU mutex. */
UNIV_INLINE
bool
fil_space_belongs_in_lru(
/*=====================*/
const fil_space_t* space) /*!< in: file space */
{
switch (space->purpose) {
case FIL_TYPE_LOG:
return(false);
case FIL_TYPE_TABLESPACE:
case FIL_TYPE_TEMPORARY:
case FIL_TYPE_IMPORT:
return(fil_is_user_tablespace_id(space->id));
}
ut_ad(0);
return(false);
}
/********************************************************************//**
NOTE: you must call fil_mutex_enter_and_prepare_for_io() first!
Prepares a file node for i/o. Opens the file if it is closed. Updates the
pending i/o's field in the node and the system appropriately. Takes the node
off the LRU list if it is in the LRU list. The caller must hold the fil_sys
mutex.
@return false if the file can't be opened, otherwise true */
static
bool
fil_node_prepare_for_io(
/*====================*/
fil_node_t* node, /*!< in: file node */
fil_system_t* system, /*!< in: tablespace memory cache */
fil_space_t* space); /*!< in: space */
/**
Updates the data structures when an i/o operation finishes. Updates the
pending i/o's field in the node appropriately.
@param[in,out] node file node
@param[in,out] system tablespace instance
@param[in] type IO context */
static
void
fil_node_complete_io(
fil_node_t* node,
fil_system_t* system,
const IORequest& type);
/** Reads data from a space to a buffer. Remember that the possible incomplete
blocks at the end of file are ignored: they are not taken into account when
calculating the byte offset within a space.
@param[in] page_id page id
@param[in] page_size page size
@param[in] byte_offset remainder of offset in bytes; in aio this
must be divisible by the OS block size
@param[in] len how many bytes to read; this must not cross a
file boundary; in aio this must be a block size multiple
@param[in,out] buf buffer where to store data read; in aio this
must be appropriately aligned
@return DB_SUCCESS, or DB_TABLESPACE_DELETED if we are trying to do
i/o on a tablespace which does not exist */
UNIV_INLINE
dberr_t
fil_read(
const page_id_t& page_id,
const page_size_t& page_size,
ulint byte_offset,
ulint len,
void* buf)
{
return(fil_io(IORequestRead, true, page_id, page_size,
byte_offset, len, buf, NULL, NULL));
}
/** Writes data to a space from a buffer. Remember that the possible incomplete
blocks at the end of file are ignored: they are not taken into account when
calculating the byte offset within a space.
@param[in] page_id page id
@param[in] page_size page size
@param[in] byte_offset remainder of offset in bytes; in aio this
must be divisible by the OS block size
@param[in] len how many bytes to write; this must not cross
a file boundary; in aio this must be a block size multiple
@param[in] buf buffer from which to write; in aio this must
be appropriately aligned
@return DB_SUCCESS, or DB_TABLESPACE_DELETED if we are trying to do
i/o on a tablespace which does not exist */
UNIV_INLINE
dberr_t
fil_write(
const page_id_t& page_id,
const page_size_t& page_size,
ulint byte_offset,
ulint len,
void* buf)
{
ut_ad(!srv_read_only_mode);
return(fil_io(IORequestWrite, true, page_id, page_size,
byte_offset, len, buf, NULL, NULL));
}
/*******************************************************************//**
Returns the table space by a given id, NULL if not found. */
fil_space_t*
fil_space_get_by_id(
/*================*/
ulint id) /*!< in: space id */
{
fil_space_t* space;
ut_ad(mutex_own(&fil_system->mutex));
HASH_SEARCH(hash, fil_system->spaces, id,
fil_space_t*, space,
ut_ad(space->magic_n == FIL_SPACE_MAGIC_N),
space->id == id);
return(space);
}
/*******************************************************************//**
Returns the table space by a given name, NULL if not found. */
UNIV_INLINE
fil_space_t*
fil_space_get_by_name(
/*==================*/
const char* name) /*!< in: space name */
{
fil_space_t* space;
ulint fold;
ut_ad(mutex_own(&fil_system->mutex));
fold = ut_fold_string(name);
HASH_SEARCH(name_hash, fil_system->name_hash, fold,
fil_space_t*, space,
ut_ad(space->magic_n == FIL_SPACE_MAGIC_N),
!strcmp(name, space->name));
return(space);
}
/** Look up a tablespace.
The caller should hold an InnoDB table lock or a MDL that prevents
the tablespace from being dropped during the operation,
or the caller should be in single-threaded crash recovery mode
(no user connections that could drop tablespaces).
If this is not the case, fil_space_acquire() and fil_space_release()
should be used instead.
@param[in] id tablespace ID
@return tablespace, or NULL if not found */
fil_space_t*
fil_space_get(
ulint id)
{
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(id);
mutex_exit(&fil_system->mutex);
ut_ad(space == NULL || space->purpose != FIL_TYPE_LOG);
return(space);
}
/** Returns the latch of a file space.
@param[in] id space id
@param[out] flags tablespace flags
@return latch protecting storage allocation */
rw_lock_t*
fil_space_get_latch(
ulint id,
ulint* flags)
{
fil_space_t* space;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space);
if (flags) {
*flags = space->flags;
}
mutex_exit(&fil_system->mutex);
return(&(space->latch));
}
/** Gets the type of a file space.
@param[in] id tablespace identifier
@return file type */
fil_type_t
fil_space_get_type(
ulint id)
{
fil_space_t* space;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space);
mutex_exit(&fil_system->mutex);
return(space->purpose);
}
/** Note that a tablespace has been imported.
It is initially marked as FIL_TYPE_IMPORT so that no logging is
done during the import process when the space ID is stamped to each page.
Now we change it to FIL_SPACE_TABLESPACE to start redo and undo logging.
NOTE: temporary tablespaces are never imported.
@param[in] id tablespace identifier */
void
fil_space_set_imported(
ulint id)
{
ut_ad(fil_system != NULL);
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(id);
ut_ad(space->purpose == FIL_TYPE_IMPORT);
space->purpose = FIL_TYPE_TABLESPACE;
mutex_exit(&fil_system->mutex);
}
/**********************************************************************//**
Checks if all the file nodes in a space are flushed. The caller must hold
the fil_system mutex.
@return true if all are flushed */
static
bool
fil_space_is_flushed(
/*=================*/
fil_space_t* space) /*!< in: space */
{
ut_ad(mutex_own(&fil_system->mutex));
for (const fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
if (node->modification_counter > node->flush_counter) {
ut_ad(!fil_buffering_disabled(space));
return(false);
}
}
return(true);
}
/** Append a file to the chain of files of a space.
@param[in] name file name of a file that is not open
@param[in] size file size in entire database blocks
@param[in,out] space tablespace from fil_space_create()
@param[in] is_raw whether this is a raw device or partition
@param[in] punch_hole true if supported for this node
@param[in] atomic_write true if the file could use atomic write
@param[in] max_pages maximum number of pages in file,
ULINT_MAX means the file size is unlimited.
@return pointer to the file name
@retval NULL if error */
static
fil_node_t*
fil_node_create_low(
const char* name,
ulint size,
fil_space_t* space,
bool is_raw,
bool punch_hole,
bool atomic_write,
ulint max_pages = ULINT_MAX)
{
fil_node_t* node;
ut_ad(name != NULL);
ut_ad(fil_system != NULL);
if (space == NULL) {
return(NULL);
}
node = reinterpret_cast<fil_node_t*>(ut_zalloc_nokey(sizeof(*node)));
node->name = mem_strdup(name);
ut_a(!is_raw || srv_start_raw_disk_in_use);
node->sync_event = os_event_create("fsync_event");
node->is_raw_disk = is_raw;
node->size = size;
node->magic_n = FIL_NODE_MAGIC_N;
node->init_size = size;
node->max_size = max_pages;
mutex_enter(&fil_system->mutex);
space->size += size;
node->space = space;
os_file_stat_t stat_info;
#ifdef UNIV_DEBUG
dberr_t err =
#endif /* UNIV_DEBUG */
os_file_get_status(
node->name, &stat_info, false,
fsp_is_system_temporary(space->id) ? true : srv_read_only_mode);
ut_ad(err == DB_SUCCESS);
node->block_size = stat_info.block_size;
/* In this debugging mode, we can overcome the limitation of some
OSes like Windows that support Punch Hole but have a hole size
effectively too large. By setting the block size to be half the
page size, we can bypass one of the checks that would normally
turn Page Compression off. This execution mode allows compression
to be tested even when full punch hole support is not available. */
DBUG_EXECUTE_IF("ignore_punch_hole",
node->block_size = ut_min(stat_info.block_size,
static_cast<size_t>(UNIV_PAGE_SIZE / 2));
);
if (!IORequest::is_punch_hole_supported()
|| !punch_hole
|| node->block_size >= srv_page_size) {
fil_no_punch_hole(node);
} else {
node->punch_hole = punch_hole;
}
node->atomic_write = atomic_write;
UT_LIST_ADD_LAST(space->chain, node);
mutex_exit(&fil_system->mutex);
return(node);
}
/** Appends a new file to the chain of files of a space. File must be closed.
@param[in] name file name (file must be closed)
@param[in] size file size in database blocks, rounded downwards to
an integer
@param[in,out] space space where to append
@param[in] is_raw true if a raw device or a raw disk partition
@param[in] atomic_write true if the file could use atomic write
@param[in] max_pages maximum number of pages in file,
ULINT_MAX means the file size is unlimited.
@return pointer to the file name
@retval NULL if error */
char*
fil_node_create(
const char* name,
ulint size,
fil_space_t* space,
bool is_raw,
bool atomic_write,
ulint max_pages)
{
fil_node_t* node;
node = fil_node_create_low(
name, size, space, is_raw, IORequest::is_punch_hole_supported(),
atomic_write, max_pages);
return(node == NULL ? NULL : node->name);
}
/** Open a file node of a tablespace.
The caller must own the fil_system mutex.
@param[in,out] node File node
@return false if the file can't be opened, otherwise true */
static
bool
fil_node_open_file(
fil_node_t* node)
{
os_offset_t size_bytes;
bool success;
byte* buf2;
byte* page;
ulint flags;
ulint min_size;
ulint space_id;
bool read_only_mode;
fil_space_t* space = node->space;
ut_ad(mutex_own(&fil_system->mutex));
ut_a(node->n_pending == 0);
ut_a(!node->is_open);
read_only_mode = !fsp_is_system_temporary(space->id)
&& srv_read_only_mode;
if (node->size == 0
|| (space->purpose == FIL_TYPE_TABLESPACE
&& node == UT_LIST_GET_FIRST(space->chain)
&& !undo::Truncate::was_tablespace_truncated(space->id)
&& srv_startup_is_before_trx_rollback_phase)) {
/* We do not know the size of the file yet. 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! */
retry:
node->handle = os_file_create_simple_no_error_handling(
innodb_data_file_key, node->name, OS_FILE_OPEN,
OS_FILE_READ_ONLY, read_only_mode, &success);
if (!success) {
/* The following call prints an error message */
ulint err = os_file_get_last_error(true);
if (err == EMFILE + 100) {
if (fil_try_to_close_file_in_LRU(true))
goto retry;
}
ib::warn() << "Cannot open '" << node->name << "'."
" Have you deleted .ibd files under a"
" running mysqld server?";
return(false);
}
size_bytes = os_file_get_size(node->handle);
ut_a(size_bytes != (os_offset_t) -1);
ut_a(space->purpose != FIL_TYPE_LOG);
/* Read the first page of the tablespace */
buf2 = static_cast<byte*>(ut_malloc_nokey(2 * UNIV_PAGE_SIZE));
/* Align the memory for file i/o if we might have O_DIRECT
set */
page = static_cast<byte*>(ut_align(buf2, UNIV_PAGE_SIZE));
ut_ad(page == page_align(page));
IORequest request(IORequest::READ);
success = os_file_read(
request,
node->handle, page, 0, UNIV_PAGE_SIZE);
srv_stats.page0_read.add(1);
space_id = fsp_header_get_space_id(page);
flags = fsp_header_get_flags(page);
/* Close the file now that we have read the space id from it */
os_file_close(node->handle);
const page_size_t page_size(flags);
min_size = FIL_IBD_FILE_INITIAL_SIZE * page_size.physical();
if (size_bytes < min_size) {
ib::error() << "The size of tablespace " << space_id << " file "
<< node->name << " is only " << size_bytes
<< ", should be at least " << min_size << "!";
ut_error;
}
if (space->flags != flags) {
ulint sflags = (space->flags & ~FSP_FLAGS_MASK_DATA_DIR);
ulint fflags = (flags & ~FSP_FLAGS_MASK_DATA_DIR_ORACLE);
/* DATA_DIR option is on different place on MariaDB
compared to MySQL. If this is the difference. Fix
it. */
if (sflags == fflags) {
ib::warn()
<< "Tablespace " << space_id
<< " flags " << space->flags
<< " in the data dictionary but in file " << node->name
<< " are " << flags
<< ". Temporally corrected because DATA_DIR option to "
<< space->flags;
flags = space->flags;
} else {
ib::fatal()
<< "Table flags are "
<< ib::hex(space->flags) << " in the data"
" dictionary but the flags in file "
<< node->name << " are " << ib::hex(flags)
<< "!";
}
}
{
ulint size = fsp_header_get_field(
page, FSP_SIZE);
ulint free_limit = fsp_header_get_field(
page, FSP_FREE_LIMIT);
ulint free_len = flst_get_len(
FSP_HEADER_OFFSET + FSP_FREE + page);
ut_ad(space->free_limit == 0
|| space->free_limit == free_limit);
ut_ad(space->free_len == 0
|| space->free_len == free_len);
space->size_in_header = size;
space->free_limit = free_limit;
space->free_len = free_len;
}
ut_free(buf2);
#ifdef MYSQL_ENCRYPTION
/* For encrypted tablespace, we need to check the
encrytion key and iv(initial vector) is readed. */
if (FSP_FLAGS_GET_ENCRYPTION(flags)
&& !recv_recovery_is_on()) {
if (space->encryption_type != Encryption::AES) {
ib::error()
<< "Can't read encryption"
<< " key from file "
<< node->name << "!";
return(false);
}
}
#endif
if (node->size == 0) {
ulint extent_size;
extent_size = page_size.physical() * FSP_EXTENT_SIZE;
/* After apply-incremental, tablespaces are not extended
to a whole megabyte. Do not cut off valid data. */
/* Truncate the size to a multiple of extent size. */
if (size_bytes >= extent_size) {
size_bytes = ut_2pow_round(size_bytes,
extent_size);
}
node->size = (ulint)
(size_bytes / page_size.physical());
space->size += node->size;
}
}
/* printf("Opening file %s\n", node->name); */
/* Open the file for reading and writing, in Windows normally in the
unbuffered async I/O mode, though global variables may make
os_file_create() to fall back to the normal file I/O mode. */
if (space->purpose == FIL_TYPE_LOG) {
node->handle = os_file_create(
innodb_log_file_key, node->name, OS_FILE_OPEN,
OS_FILE_AIO, OS_LOG_FILE, read_only_mode, &success);
} else if (node->is_raw_disk) {
node->handle = os_file_create(
innodb_data_file_key, node->name, OS_FILE_OPEN_RAW,
OS_FILE_AIO, OS_DATA_FILE, read_only_mode, &success);
} else {
node->handle = os_file_create(
innodb_data_file_key, node->name, OS_FILE_OPEN,
OS_FILE_AIO, OS_DATA_FILE, read_only_mode, &success);
if (!space->atomic_write_tested)
{
const page_size_t page_size(space->flags);
space->atomic_write_tested= 1;
/*
Atomic writes is supported if the file can be used
with atomic_writes (not log file), O_DIRECT is
used (tested in ha_innodbc.cc) and the file is
device and file system that supports atomic writes
for the given block size
*/
space->atomic_write_supported=
srv_use_atomic_writes &&
node->atomic_write &&
my_test_if_atomic_write(node->handle,
page_size.physical()) ?
true : false;
}
}
ut_a(success);
node->is_open = true;
fil_system->n_open++;
fil_n_file_opened++;
if (fil_space_belongs_in_lru(space)) {
/* Put the node to the LRU list */
UT_LIST_ADD_FIRST(fil_system->LRU, node);
}
return(true);
}
/** Close a file node.
@param[in,out] node File node */
static
void
fil_node_close_file(
fil_node_t* node)
{
bool ret;
ut_ad(mutex_own(&(fil_system->mutex)));
ut_a(node->is_open);
ut_a(node->n_pending == 0);
ut_a(node->n_pending_flushes == 0);
ut_a(!node->being_extended);
ut_a(node->modification_counter == node->flush_counter
|| node->space->purpose == FIL_TYPE_TEMPORARY
|| srv_fast_shutdown == 2);
ret = os_file_close(node->handle);
ut_a(ret);
/* printf("Closing file %s\n", node->name); */
node->is_open = false;
ut_a(fil_system->n_open > 0);
fil_system->n_open--;
fil_n_file_opened--;
if (fil_space_belongs_in_lru(node->space)) {
ut_a(UT_LIST_GET_LEN(fil_system->LRU) > 0);
/* The node is in the LRU list, remove it */
UT_LIST_REMOVE(fil_system->LRU, node);
}
}
/** Tries to close a file in the LRU list. The caller must hold the fil_sys
mutex.
@return true if success, false if should retry later; since i/o's
generally complete in < 100 ms, and as InnoDB writes at most 128 pages
from the buffer pool in a batch, and then immediately flushes the
files, there is a good chance that the next time we find a suitable
node from the LRU list.
@param[in] print_info if true, prints information why it
cannot close a file*/
static
bool
fil_try_to_close_file_in_LRU(
bool print_info)
{
fil_node_t* node;
ut_ad(mutex_own(&fil_system->mutex));
if (print_info) {
ib::info() << "fil_sys open file LRU len "
<< UT_LIST_GET_LEN(fil_system->LRU);
}
for (node = UT_LIST_GET_LAST(fil_system->LRU);
node != NULL;
node = UT_LIST_GET_PREV(LRU, node)) {
if (node->modification_counter == node->flush_counter
&& node->n_pending_flushes == 0
&& !node->being_extended) {
fil_node_close_file(node);
return(true);
}
if (!print_info) {
continue;
}
if (node->n_pending_flushes > 0) {
ib::info() << "Cannot close file " << node->name
<< ", because n_pending_flushes "
<< node->n_pending_flushes;
}
if (node->modification_counter != node->flush_counter) {
ib::warn() << "Cannot close file " << node->name
<< ", because modification count "
<< node->modification_counter <<
" != flush count " << node->flush_counter;
}
if (node->being_extended) {
ib::info() << "Cannot close file " << node->name
<< ", because it is being extended";
}
}
return(false);
}
/** Flush any writes cached by the file system.
@param[in,out] space tablespace */
static
void
fil_flush_low(fil_space_t* space)
{
ut_ad(mutex_own(&fil_system->mutex));
ut_ad(space);
ut_ad(!space->stop_new_ops);
if (fil_buffering_disabled(space)) {
/* No need to flush. User has explicitly disabled
buffering. */
ut_ad(!space->is_in_unflushed_spaces);
ut_ad(fil_space_is_flushed(space));
ut_ad(space->n_pending_flushes == 0);
#ifdef UNIV_DEBUG
for (fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
ut_ad(node->modification_counter
== node->flush_counter);
ut_ad(node->n_pending_flushes == 0);
}
#endif /* UNIV_DEBUG */
return;
}
/* Prevent dropping of the space while we are flushing */
space->n_pending_flushes++;
for (fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
int64_t old_mod_counter = node->modification_counter;
if (old_mod_counter <= node->flush_counter) {
continue;
}
ut_a(node->is_open);
switch (space->purpose) {
case FIL_TYPE_TEMPORARY:
ut_ad(0); // we already checked for this
case FIL_TYPE_TABLESPACE:
case FIL_TYPE_IMPORT:
fil_n_pending_tablespace_flushes++;
break;
case FIL_TYPE_LOG:
fil_n_pending_log_flushes++;
fil_n_log_flushes++;
break;
}
#ifdef _WIN32
if (node->is_raw_disk) {
goto skip_flush;
}
#endif /* _WIN32 */
retry:
if (node->n_pending_flushes > 0) {
/* We want to avoid calling os_file_flush() on
the file twice at the same time, because we do
not know what bugs OS's may contain in file
i/o */
int64_t sig_count = os_event_reset(node->sync_event);
mutex_exit(&fil_system->mutex);
os_event_wait_low(node->sync_event, sig_count);
mutex_enter(&fil_system->mutex);
if (node->flush_counter >= old_mod_counter) {
goto skip_flush;
}
goto retry;
}
ut_a(node->is_open);
node->n_pending_flushes++;
mutex_exit(&fil_system->mutex);
os_file_flush(node->handle);
mutex_enter(&fil_system->mutex);
os_event_set(node->sync_event);
node->n_pending_flushes--;
skip_flush:
if (node->flush_counter < old_mod_counter) {
node->flush_counter = old_mod_counter;
if (space->is_in_unflushed_spaces
&& fil_space_is_flushed(space)) {
space->is_in_unflushed_spaces = false;
UT_LIST_REMOVE(
fil_system->unflushed_spaces,
space);
}
}
switch (space->purpose) {
case FIL_TYPE_TEMPORARY:
break;
case FIL_TYPE_TABLESPACE:
case FIL_TYPE_IMPORT:
fil_n_pending_tablespace_flushes--;
continue;
case FIL_TYPE_LOG:
fil_n_pending_log_flushes--;
continue;
}
ut_ad(0);
}
space->n_pending_flushes--;
}
/**
Fill the pages with NULs
@param[in] node File node
@param[in] page_size physical page size
@param[in] start Offset from the start of the file in bytes
@param[in] len Length in bytes
@param[in] read_only_mode
if true, then read only mode checks are enforced.
@return DB_SUCCESS or error code */
static
dberr_t
fil_write_zeros(
const fil_node_t* node,
ulint page_size,
os_offset_t start,
ulint len,
bool read_only_mode)
{
ut_a(len > 0);
/* Extend at most 1M at a time */
ulint n_bytes = ut_min(static_cast<ulint>(1024 * 1024), len);
byte* ptr = reinterpret_cast<byte*>(ut_zalloc_nokey(n_bytes
+ page_size));
byte* buf = reinterpret_cast<byte*>(ut_align(ptr, page_size));
os_offset_t offset = start;
dberr_t err = DB_SUCCESS;
const os_offset_t end = start + len;
IORequest request(IORequest::WRITE);
while (offset < end) {
err = os_aio(
request, OS_AIO_SYNC, node->name,
node->handle, buf, offset, n_bytes, read_only_mode,
NULL, NULL, NULL);
if (err != DB_SUCCESS) {
break;
}
offset += n_bytes;
n_bytes = ut_min(n_bytes, static_cast<ulint>(end - offset));
DBUG_EXECUTE_IF("ib_crash_during_tablespace_extension",
DBUG_SUICIDE(););
}
ut_free(ptr);
return(err);
}
/** Try to extend a tablespace.
@param[in,out] space tablespace to be extended
@param[in,out] node last file of the tablespace
@param[in] size desired size in number of pages
@param[out] success whether the operation succeeded
@return whether the operation should be retried */
static UNIV_COLD __attribute__((warn_unused_result, nonnull))
bool
fil_space_extend_must_retry(
fil_space_t* space,
fil_node_t* node,
ulint size,
bool* success)
{
ut_ad(mutex_own(&fil_system->mutex));
ut_ad(UT_LIST_GET_LAST(space->chain) == node);
ut_ad(size >= FIL_IBD_FILE_INITIAL_SIZE);
*success = space->size >= size;
if (*success) {
/* Space already big enough */
return(false);
}
if (node->being_extended) {
/* Another thread is currently extending the file. Wait
for it to finish.
It'd have been better to use event driven mechanism but
the entire module is peppered with polling stuff. */
mutex_exit(&fil_system->mutex);
os_thread_sleep(100000);
return(true);
}
node->being_extended = true;
if (!fil_node_prepare_for_io(node, fil_system, space)) {
/* The tablespace data file, such as .ibd file, is missing */
node->being_extended = false;
return(false);
}
/* At this point it is safe to release fil_system mutex. No
other thread can rename, delete, close or extend the file because
we have set the node->being_extended flag. */
mutex_exit(&fil_system->mutex);
ut_ad(size > space->size);
ulint pages_added = size - space->size;
const page_size_t pageSize(space->flags);
const ulint page_size = pageSize.physical();
os_offset_t start = os_file_get_size(node->handle);
ut_a(start != (os_offset_t) -1);
start &= ~(page_size - 1);
const os_offset_t end
= (node->size + pages_added) * page_size;
*success = end <= start;
if (!*success) {
DBUG_EXECUTE_IF("ib_crash_during_tablespace_extension",
DBUG_SUICIDE(););
#ifdef HAVE_POSIX_FALLOCATE
/* On Linux, FusionIO atomic writes cannot extend
files, so we must use posix_fallocate(). */
int ret = posix_fallocate(node->handle, start,
end - start);
/* EINVAL means that fallocate() is not supported.
One known case is Linux ext3 file system with O_DIRECT. */
if (ret == 0) {
} else if (ret != EINVAL) {
ib::error()
<< "posix_fallocate(): Failed to preallocate"
" data for file "
<< node->name << ", desired size "
<< end << " bytes."
" Operating system error number "
<< ret << ". Check"
" that the disk is not full or a disk quota"
" exceeded. Make sure the file system supports"
" this function. Some operating system error"
" numbers are described at " REFMAN
" operating-system-error-codes.html";
} else
#endif
if (DB_SUCCESS != fil_write_zeros(
node, page_size, start,
static_cast<ulint>(end - start),
space->purpose == FIL_TYPE_TEMPORARY
&& srv_read_only_mode)) {
ib::warn()
<< "Error while writing " << end - start
<< " zeroes to " << node->name
<< " starting at offset " << start;
}
/* Check how many pages actually added */
os_offset_t actual_end = os_file_get_size(node->handle);
ut_a(actual_end != static_cast<os_offset_t>(-1));
ut_a(actual_end >= start);
*success = end >= actual_end;
pages_added = static_cast<ulint>(
(std::min(actual_end, end) - start) / page_size);
}
os_has_said_disk_full = !*success;
mutex_enter(&fil_system->mutex);
space->size += pages_added;
ut_a(node->being_extended);
node->being_extended = false;
node->size += pages_added;
const ulint pages_in_MiB = node->size
& ~((1 << (20 - UNIV_PAGE_SIZE_SHIFT)) - 1);
fil_node_complete_io(node, fil_system, IORequestWrite);
/* Keep the last data file size info up to date, rounded to
full megabytes */
switch (space->id) {
case TRX_SYS_SPACE:
srv_sys_space.set_last_file_size(pages_in_MiB);
fil_flush_low(space);
return(false);
default:
// TODO: reject CREATE TEMPORARY TABLE...ROW_FORMAT=COMPRESSED
ut_ad(space->purpose == FIL_TYPE_TABLESPACE
|| space->purpose == FIL_TYPE_TEMPORARY);
if (space->purpose == FIL_TYPE_TABLESPACE) {
fil_flush_low(space);
}
return(false);
case SRV_TMP_SPACE_ID:
ut_ad(space->purpose == FIL_TYPE_TEMPORARY);
srv_tmp_space.set_last_file_size(pages_in_MiB);
return(false);
}
}
/*******************************************************************//**
Reserves the fil_system mutex and tries to make sure we can open at least one
file while holding it. This should be called before calling
fil_node_prepare_for_io(), because that function may need to open a file. */
static
void
fil_mutex_enter_and_prepare_for_io(
/*===============================*/
ulint space_id) /*!< in: space id */
{
for (ulint count = 0, count2 = 0;;) {
mutex_enter(&fil_system->mutex);
if (space_id >= SRV_LOG_SPACE_FIRST_ID) {
/* We keep log files always open. */
break;
}
fil_space_t* space = fil_space_get_by_id(space_id);
if (space == NULL) {
break;
}
if (space->stop_ios) {
ut_ad(space->id != 0);
/* We are going to do a rename file and want to stop
new i/o's for a while. */
if (count2 > 20000) {
ib::warn() << "Tablespace " << space->name
<< " has i/o ops stopped for a long"
" time " << count2;
}
mutex_exit(&fil_system->mutex);
/* Wake the i/o-handler threads to make sure pending
i/o's are performed */
os_aio_simulated_wake_handler_threads();
/* The sleep here is just to give IO helper threads a
bit of time to do some work. It is not required that
all IO related to the tablespace being renamed must
be flushed here as we do fil_flush() in
fil_rename_tablespace() as well. */
os_thread_sleep(20000);
/* Flush tablespaces so that we can close modified
files in the LRU list */
fil_flush_file_spaces(FIL_TYPE_TABLESPACE);
os_thread_sleep(20000);
count2++;
continue;
}
fil_node_t* node = UT_LIST_GET_LAST(space->chain);
ut_ad(space->id == 0
|| node == UT_LIST_GET_FIRST(space->chain));
if (space->id == 0) {
/* We keep the 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 0, and we cannot end up waiting in
this function. */
} else if (!node || node->is_open) {
/* If the file is already open, no need to do
anything; if the space does not exist, we handle the
situation in the function which called this
function */
} else {
while (fil_system->n_open >= fil_system->max_n_open) {
/* Too many files are open */
if (fil_try_to_close_file_in_LRU(count > 1)) {
/* No problem */
} else if (count >= 2) {
ib::warn() << "innodb_open_files="
<< fil_system->max_n_open
<< " is exceeded ("
<< fil_system->n_open
<< ") files stay open)";
break;
} else {
mutex_exit(&fil_system->mutex);
os_aio_simulated_wake_handler_threads();
os_thread_sleep(20000);
/* Flush tablespaces so that we can
close modified files in the LRU list */
fil_flush_file_spaces(FIL_TYPE_TABLESPACE);
count++;
continue;
}
}
}
if (ulint size = UNIV_UNLIKELY(space->recv_size)) {
ut_ad(node);
bool success;
if (fil_space_extend_must_retry(space, node, size,
&success)) {
continue;
}
ut_ad(mutex_own(&fil_system->mutex));
/* Crash recovery requires the file extension
to succeed. */
ut_a(success);
/* InnoDB data files cannot shrink. */
ut_a(space->size >= size);
/* There could be multiple concurrent I/O requests for
this tablespace (multiple threads trying to extend
this tablespace).
Also, fil_space_set_recv_size() may have been invoked
again during the file extension while fil_system->mutex
was not being held by us.
Only if space->recv_size matches what we read
originally, reset the field. In this way, a
subsequent I/O request will handle any pending
fil_space_set_recv_size(). */
if (size == space->recv_size) {
space->recv_size = 0;
}
}
break;
}
}
/** Try to extend a tablespace if it is smaller than the specified size.
@param[in,out] space tablespace
@param[in] size desired size in pages
@return whether the tablespace is at least as big as requested */
bool
fil_space_extend(
fil_space_t* space,
ulint size)
{
ut_ad(!srv_read_only_mode || space->purpose == FIL_TYPE_TEMPORARY);
bool success;
do {
fil_mutex_enter_and_prepare_for_io(space->id);
} while (fil_space_extend_must_retry(
space, UT_LIST_GET_LAST(space->chain), size,
&success));
mutex_exit(&fil_system->mutex);
return(success);
}
/** Prepare to free a file node object from a tablespace memory cache.
@param[in,out] node file node
@param[in] space tablespace */
static
void
fil_node_close_to_free(
fil_node_t* node,
fil_space_t* space)
{
ut_ad(mutex_own(&fil_system->mutex));
ut_a(node->magic_n == FIL_NODE_MAGIC_N);
ut_a(node->n_pending == 0);
ut_a(!node->being_extended);
if (node->is_open) {
/* We fool the assertion in fil_node_close_file() to think
there are no unflushed modifications in the file */
node->modification_counter = node->flush_counter;
os_event_set(node->sync_event);
if (fil_buffering_disabled(space)) {
ut_ad(!space->is_in_unflushed_spaces);
ut_ad(fil_space_is_flushed(space));
} else if (space->is_in_unflushed_spaces
&& fil_space_is_flushed(space)) {
space->is_in_unflushed_spaces = false;
UT_LIST_REMOVE(fil_system->unflushed_spaces, space);
}
fil_node_close_file(node);
}
}
/** Detach a space object from the tablespace memory cache.
Closes the files in the chain but does not delete them.
There must not be any pending i/o's or flushes on the files.
@param[in,out] space tablespace */
static
void
fil_space_detach(
fil_space_t* space)
{
ut_ad(mutex_own(&fil_system->mutex));
HASH_DELETE(fil_space_t, hash, fil_system->spaces, space->id, space);
fil_space_t* fnamespace = fil_space_get_by_name(space->name);
ut_a(space == fnamespace);
HASH_DELETE(fil_space_t, name_hash, fil_system->name_hash,
ut_fold_string(space->name), space);
if (space->is_in_unflushed_spaces) {
ut_ad(!fil_buffering_disabled(space));
space->is_in_unflushed_spaces = false;
UT_LIST_REMOVE(fil_system->unflushed_spaces, space);
}
UT_LIST_REMOVE(fil_system->space_list, space);
ut_a(space->magic_n == FIL_SPACE_MAGIC_N);
ut_a(space->n_pending_flushes == 0);
for (fil_node_t* fil_node = UT_LIST_GET_FIRST(space->chain);
fil_node != NULL;
fil_node = UT_LIST_GET_NEXT(chain, fil_node)) {
fil_node_close_to_free(fil_node, space);
}
}
/** 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.
@param[in,out] space tablespace */
static
void
fil_space_free_low(
fil_space_t* space)
{
/* The tablespace must not be in fil_system->named_spaces. */
ut_ad(srv_fast_shutdown == 2 || space->max_lsn == 0);
for (fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
node != NULL; ) {
ut_d(space->size -= node->size);
os_event_destroy(node->sync_event);
ut_free(node->name);
fil_node_t* old_node = node;
node = UT_LIST_GET_NEXT(chain, node);
ut_free(old_node);
}
ut_ad(space->size == 0);
rw_lock_free(&space->latch);
fil_space_destroy_crypt_data(&space->crypt_data);
ut_free(space->name);
ut_free(space);
}
/** Frees a space object from the tablespace memory cache.
Closes the files in the chain but does not delete them.
There must not be any pending i/o's or flushes on the files.
@param[in] id tablespace identifier
@param[in] x_latched whether the caller holds X-mode space->latch
@return true if success */
bool
fil_space_free(
ulint id,
bool x_latched)
{
ut_ad(id != TRX_SYS_SPACE);
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(id);
if (space != NULL) {
fil_space_detach(space);
}
mutex_exit(&fil_system->mutex);
if (space != NULL) {
if (x_latched) {
rw_lock_x_unlock(&space->latch);
}
bool need_mutex = !recv_recovery_on;
if (need_mutex) {
log_mutex_enter();
}
ut_ad(log_mutex_own());
if (space->max_lsn != 0) {
ut_d(space->max_lsn = 0);
UT_LIST_REMOVE(fil_system->named_spaces, space);
}
if (need_mutex) {
log_mutex_exit();
}
fil_space_free_low(space);
}
return(space != NULL);
}
/** 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.
@param[in] name Tablespace name
@param[in] id Tablespace identifier
@param[in] flags Tablespace flags
@param[in] purpose Tablespace purpose
@return pointer to created tablespace, to be filled in with fil_node_create()
@retval NULL on failure (such as when the same tablespace exists) */
fil_space_t*
fil_space_create(
const char* name,
ulint id,
ulint flags,
fil_type_t purpose,
fil_space_crypt_t* crypt_data, /*!< in: crypt data */
bool create_table) /*!< in: true if create table */
{
fil_space_t* space;
ut_ad(fil_system);
ut_ad(fsp_flags_is_valid(flags));
ut_ad(srv_page_size == UNIV_PAGE_SIZE_ORIG || flags != 0);
DBUG_EXECUTE_IF("fil_space_create_failure", return(NULL););
mutex_enter(&fil_system->mutex);
/* Look for a matching tablespace. */
space = fil_space_get_by_name(name);
if (space != NULL) {
mutex_exit(&fil_system->mutex);
ib::warn() << "Tablespace '" << name << "' exists in the"
" cache with id " << space->id << " != " << id;
return(NULL);
}
space = fil_space_get_by_id(id);
if (space != NULL) {
ib::error() << "Trying to add tablespace '" << name
<< "' with id " << id
<< " to the tablespace memory cache, but tablespace '"
<< space->name << "' already exists in the cache!";
mutex_exit(&fil_system->mutex);
return(NULL);
}
space = static_cast<fil_space_t*>(ut_zalloc_nokey(sizeof(*space)));
space->id = id;
space->name = mem_strdup(name);
UT_LIST_INIT(space->chain, &fil_node_t::chain);
if ((purpose == FIL_TYPE_TABLESPACE || purpose == FIL_TYPE_IMPORT)
&& !recv_recovery_on
&& id > fil_system->max_assigned_id) {
if (!fil_system->space_id_reuse_warned) {
fil_system->space_id_reuse_warned = true;
ib::warn() << "Allocated tablespace ID " << id
<< " for " << name << ", old maximum was "
<< fil_system->max_assigned_id;
}
fil_system->max_assigned_id = id;
}
space->purpose = purpose;
space->flags = flags;
space->magic_n = FIL_SPACE_MAGIC_N;
space->crypt_data = crypt_data;
/* In create table we write page 0 so we have already
"read" it and for system tablespaces we have read
crypt data at startup. */
if (create_table || crypt_data != NULL) {
space->page_0_crypt_read = true;
}
DBUG_LOG("tablespace",
"Tablespace for space " << id << " name " << name
<< (create_table ? " created" : " opened"));
if (crypt_data) {
DBUG_LOG("crypt",
"Tablespace " << id << " name " << name
<< " encryption " << crypt_data->encryption
<< " key id " << crypt_data->key_id
<< ":" << fil_crypt_get_mode(crypt_data)
<< " " << fil_crypt_get_type(crypt_data));
}
space->encryption_type = Encryption::NONE;
rw_lock_create(fil_space_latch_key, &space->latch, SYNC_FSP);
if (space->purpose == FIL_TYPE_TEMPORARY) {
ut_d(space->latch.set_temp_fsp());
}
HASH_INSERT(fil_space_t, hash, fil_system->spaces, id, space);
HASH_INSERT(fil_space_t, name_hash, fil_system->name_hash,
ut_fold_string(name), space);
UT_LIST_ADD_LAST(fil_system->space_list, space);
if (id < SRV_LOG_SPACE_FIRST_ID && id > fil_system->max_assigned_id) {
fil_system->max_assigned_id = id;
}
mutex_exit(&fil_system->mutex);
return(space);
}
/*******************************************************************//**
Assigns a new space id for a new single-table tablespace. This works simply by
incrementing the global counter. If 4 billion id's is not enough, we may need
to recycle id's.
@return true if assigned, false if not */
bool
fil_assign_new_space_id(
/*====================*/
ulint* space_id) /*!< in/out: space id */
{
ulint id;
bool success;
mutex_enter(&fil_system->mutex);
id = *space_id;
if (id < fil_system->max_assigned_id) {
id = fil_system->max_assigned_id;
}
id++;
if (id > (SRV_LOG_SPACE_FIRST_ID / 2) && (id % 1000000UL == 0)) {
ib::warn() << "You are running out of new single-table"
" tablespace id's. Current counter is " << id
<< " and it must not exceed" << SRV_LOG_SPACE_FIRST_ID
<< "! To reset the counter to zero you have to dump"
" all your tables and recreate the whole InnoDB"
" installation.";
}
success = (id < SRV_LOG_SPACE_FIRST_ID);
if (success) {
*space_id = fil_system->max_assigned_id = id;
} else {
ib::warn() << "You have run out of single-table tablespace"
" id's! Current counter is " << id
<< ". To reset the counter to zero"
" you have to dump all your tables and"
" recreate the whole InnoDB installation.";
*space_id = ULINT_UNDEFINED;
}
mutex_exit(&fil_system->mutex);
return(success);
}
/*******************************************************************//**
Returns a pointer to the fil_space_t that is in the memory cache
associated with a space id. The caller must lock fil_system->mutex.
@return file_space_t pointer, NULL if space not found */
UNIV_INLINE
fil_space_t*
fil_space_get_space(
/*================*/
ulint id) /*!< in: space id */
{
fil_space_t* space;
fil_node_t* node;
ut_ad(fil_system);
space = fil_space_get_by_id(id);
if (space == NULL || space->size != 0) {
return(space);
}
switch (space->purpose) {
case FIL_TYPE_LOG:
break;
case FIL_TYPE_TEMPORARY:
case FIL_TYPE_TABLESPACE:
case FIL_TYPE_IMPORT:
ut_a(id != 0);
mutex_exit(&fil_system->mutex);
/* It is possible that the space gets evicted at this point
before the fil_mutex_enter_and_prepare_for_io() acquires
the fil_system->mutex. Check for this after completing the
call to fil_mutex_enter_and_prepare_for_io(). */
fil_mutex_enter_and_prepare_for_io(id);
/* We are still holding the fil_system->mutex. Check if
the space is still in memory cache. */
space = fil_space_get_by_id(id);
if (space == NULL || UT_LIST_GET_LEN(space->chain) == 0) {
return(NULL);
}
/* The following code must change when InnoDB supports
multiple datafiles per tablespace. */
ut_a(1 == UT_LIST_GET_LEN(space->chain));
node = UT_LIST_GET_FIRST(space->chain);
/* It must be a single-table tablespace and we have not opened
the file yet; the following calls will open it and update the
size fields */
if (!fil_node_prepare_for_io(node, fil_system, space)) {
/* The single-table tablespace can't be opened,
because the ibd file is missing. */
return(NULL);
}
fil_node_complete_io(node, fil_system, IORequestRead);
}
return(space);
}
/** Returns the path from the first fil_node_t found with this space ID.
The caller is responsible for freeing the memory allocated here for the
value returned.
@param[in] id Tablespace ID
@return own: A copy of fil_node_t::path, NULL if space ID is zero
or not found. */
char*
fil_space_get_first_path(
ulint id)
{
fil_space_t* space;
fil_node_t* node;
char* path;
ut_ad(fil_system);
ut_a(id);
fil_mutex_enter_and_prepare_for_io(id);
space = fil_space_get_space(id);
if (space == NULL) {
mutex_exit(&fil_system->mutex);
return(NULL);
}
ut_ad(mutex_own(&fil_system->mutex));
node = UT_LIST_GET_FIRST(space->chain);
path = mem_strdup(node->name);
mutex_exit(&fil_system->mutex);
return(path);
}
/** Set the recovered size of a tablespace in pages.
@param id tablespace ID
@param size recovered size in pages */
UNIV_INTERN
void
fil_space_set_recv_size(ulint id, ulint size)
{
mutex_enter(&fil_system->mutex);
ut_ad(size);
ut_ad(id < SRV_LOG_SPACE_FIRST_ID);
if (fil_space_t* space = fil_space_get_space(id)) {
space->recv_size = size;
}
mutex_exit(&fil_system->mutex);
}
/*******************************************************************//**
Returns the size of the space in pages. The tablespace must be cached in the
memory cache.
@return space size, 0 if space not found */
ulint
fil_space_get_size(
/*===============*/
ulint id) /*!< in: space id */
{
fil_space_t* space;
ulint size;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_space(id);
size = space ? space->size : 0;
mutex_exit(&fil_system->mutex);
return(size);
}
/*******************************************************************//**
Returns the flags of the space. The tablespace must be cached
in the memory cache.
@return flags, ULINT_UNDEFINED if space not found */
ulint
fil_space_get_flags(
/*================*/
ulint id) /*!< in: space id */
{
fil_space_t* space;
ulint flags;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_space(id);
if (space == NULL) {
mutex_exit(&fil_system->mutex);
return(ULINT_UNDEFINED);
}
flags = space->flags;
mutex_exit(&fil_system->mutex);
return(flags);
}
/** Check if table is mark for truncate.
@param[in] id space id
@return true if tablespace is marked for truncate. */
bool
fil_space_is_being_truncated(
ulint id)
{
bool mark_for_truncate;
mutex_enter(&fil_system->mutex);
mark_for_truncate = fil_space_get_by_id(id)->is_being_truncated;
mutex_exit(&fil_system->mutex);
return(mark_for_truncate);
}
/** Open each fil_node_t of a named fil_space_t if not already open.
@param[in] name Tablespace name
@return true if all nodes are open */
bool
fil_space_open(
const char* name)
{
ut_ad(fil_system != NULL);
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_name(name);
fil_node_t* node;
for (node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
if (!node->is_open
&& !fil_node_open_file(node)) {
mutex_exit(&fil_system->mutex);
return(false);
}
}
mutex_exit(&fil_system->mutex);
return(true);
}
/** Close each fil_node_t of a named fil_space_t if open.
@param[in] name Tablespace name */
void
fil_space_close(
const char* name)
{
if (fil_system == NULL) {
return;
}
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_name(name);
if (space == NULL) {
mutex_exit(&fil_system->mutex);
return;
}
for (fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
if (node->is_open) {
fil_node_close_file(node);
}
}
mutex_exit(&fil_system->mutex);
}
/** Returns the page size of the space and whether it is compressed or not.
The tablespace must be cached in the memory cache.
@param[in] id space id
@param[out] found true if tablespace was found
@return page size */
const page_size_t
fil_space_get_page_size(
ulint id,
bool* found)
{
const ulint flags = fil_space_get_flags(id);
if (flags == ULINT_UNDEFINED) {
*found = false;
return(univ_page_size);
}
*found = true;
return(page_size_t(flags));
}
/****************************************************************//**
Initializes the tablespace memory cache. */
void
fil_init(
/*=====*/
ulint hash_size, /*!< in: hash table size */
ulint max_n_open) /*!< in: max number of open files */
{
ut_a(fil_system == NULL);
ut_a(hash_size > 0);
ut_a(max_n_open > 0);
fil_system = static_cast<fil_system_t*>(
ut_zalloc_nokey(sizeof(*fil_system)));
mutex_create(LATCH_ID_FIL_SYSTEM, &fil_system->mutex);
fil_system->spaces = hash_create(hash_size);
fil_system->name_hash = hash_create(hash_size);
UT_LIST_INIT(fil_system->LRU, &fil_node_t::LRU);
UT_LIST_INIT(fil_system->space_list, &fil_space_t::space_list);
UT_LIST_INIT(fil_system->unflushed_spaces,
&fil_space_t::unflushed_spaces);
UT_LIST_INIT(fil_system->named_spaces, &fil_space_t::named_spaces);
fil_system->max_n_open = max_n_open;
fil_space_crypt_init();
}
/*******************************************************************//**
Opens all log files and system tablespace data files. They stay open until the
database server shutdown. This should be called at a server startup after the
space objects for the log and the system tablespace have been created. The
purpose of this operation is to make sure we never run out of file descriptors
if we need to read from the insert buffer or to write to the log. */
void
fil_open_log_and_system_tablespace_files(void)
/*==========================================*/
{
fil_space_t* space;
mutex_enter(&fil_system->mutex);
for (space = UT_LIST_GET_FIRST(fil_system->space_list);
space != NULL;
space = UT_LIST_GET_NEXT(space_list, space)) {
fil_node_t* node;
if (fil_space_belongs_in_lru(space)) {
continue;
}
for (node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
if (!node->is_open) {
if (!fil_node_open_file(node)) {
/* This func is called during server's
startup. If some file of log or system
tablespace is missing, the server
can't start successfully. So we should
assert for it. */
ut_a(0);
}
}
if (fil_system->max_n_open < 10 + fil_system->n_open) {
ib::warn() << "You must raise the value of"
" innodb_open_files in my.cnf!"
" Remember that InnoDB keeps all"
" log files and all system"
" tablespace files open"
" for the whole time mysqld is"
" running, and needs to open also"
" some .ibd files if the"
" file-per-table storage model is used."
" Current open files "
<< fil_system->n_open
<< ", max allowed open files "
<< fil_system->max_n_open
<< ".";
}
}
}
mutex_exit(&fil_system->mutex);
}
/*******************************************************************//**
Closes all open files. There must not be any pending i/o's or not flushed
modifications in the files. */
void
fil_close_all_files(void)
/*=====================*/
{
fil_space_t* space;
/* At shutdown, we should not have any files in this list. */
ut_ad(srv_fast_shutdown == 2
|| UT_LIST_GET_LEN(fil_system->named_spaces) == 0);
mutex_enter(&fil_system->mutex);
for (space = UT_LIST_GET_FIRST(fil_system->space_list);
space != NULL; ) {
fil_node_t* node;
fil_space_t* prev_space = space;
for (node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
if (node->is_open) {
fil_node_close_file(node);
}
}
space = UT_LIST_GET_NEXT(space_list, space);
fil_space_detach(prev_space);
fil_space_free_low(prev_space);
}
mutex_exit(&fil_system->mutex);
ut_ad(srv_fast_shutdown == 2
|| UT_LIST_GET_LEN(fil_system->named_spaces) == 0);
}
/*******************************************************************//**
Closes the redo log files. There must not be any pending i/o's or not
flushed modifications in the files. */
void
fil_close_log_files(
/*================*/
bool free) /*!< in: whether to free the memory object */
{
fil_space_t* space;
mutex_enter(&fil_system->mutex);
space = UT_LIST_GET_FIRST(fil_system->space_list);
while (space != NULL) {
fil_node_t* node;
fil_space_t* prev_space = space;
if (space->purpose != FIL_TYPE_LOG) {
space = UT_LIST_GET_NEXT(space_list, space);
continue;
}
/* Log files are not in the fil_system->named_spaces list. */
ut_ad(space->max_lsn == 0);
for (node = UT_LIST_GET_FIRST(space->chain);
node != NULL;
node = UT_LIST_GET_NEXT(chain, node)) {
if (node->is_open) {
fil_node_close_file(node);
}
}
space = UT_LIST_GET_NEXT(space_list, space);
if (free) {
fil_space_detach(prev_space);
fil_space_free_low(prev_space);
}
}
mutex_exit(&fil_system->mutex);
}
/*******************************************************************//**
Sets the max tablespace id counter if the given number is bigger than the
previous value. */
void
fil_set_max_space_id_if_bigger(
/*===========================*/
ulint max_id) /*!< in: maximum known id */
{
if (max_id >= SRV_LOG_SPACE_FIRST_ID) {
ib::fatal() << "Max tablespace id is too high, " << max_id;
}
mutex_enter(&fil_system->mutex);
if (fil_system->max_assigned_id < max_id) {
fil_system->max_assigned_id = max_id;
}
mutex_exit(&fil_system->mutex);
}
/** Write the flushed LSN to the page header of the first page in the
system tablespace.
@param[in] lsn flushed LSN
@return DB_SUCCESS or error number */
dberr_t
fil_write_flushed_lsn(
lsn_t lsn)
{
byte* buf1;
byte* buf;
dberr_t err;
buf1 = static_cast<byte*>(ut_malloc_nokey(2 * UNIV_PAGE_SIZE));
buf = static_cast<byte*>(ut_align(buf1, UNIV_PAGE_SIZE));
const page_id_t page_id(TRX_SYS_SPACE, 0);
err = fil_read(page_id, univ_page_size, 0, univ_page_size.physical(),
buf);
if (err == DB_SUCCESS) {
mach_write_to_8(buf + FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION, lsn);
err = fil_write(page_id, univ_page_size, 0,
univ_page_size.physical(), buf);
fil_flush_file_spaces(FIL_TYPE_TABLESPACE);
}
ut_free(buf1);
return(err);
}
/** Acquire a tablespace when it could be dropped concurrently.
Used by background threads that do not necessarily hold proper locks
for concurrency control.
@param[in] id tablespace ID
@param[in] silent whether to silently ignore missing tablespaces
@return the tablespace, or NULL if missing or being deleted */
inline
fil_space_t*
fil_space_acquire_low(
ulint id,
bool silent)
{
fil_space_t* space;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
if (space == NULL) {
if (!silent) {
ib::warn() << "Trying to access missing"
" tablespace " << id;
}
} else if (space->stop_new_ops || space->is_being_truncated) {
space = NULL;
} else {
space->n_pending_ops++;
}
mutex_exit(&fil_system->mutex);
return(space);
}
/** Acquire a tablespace when it could be dropped concurrently.
Used by background threads that do not necessarily hold proper locks
for concurrency control.
@param[in] id tablespace ID
@return the tablespace, or NULL if missing or being deleted */
fil_space_t*
fil_space_acquire(
ulint id)
{
return(fil_space_acquire_low(id, false));
}
/** Acquire a tablespace that may not exist.
Used by background threads that do not necessarily hold proper locks
for concurrency control.
@param[in] id tablespace ID
@return the tablespace, or NULL if missing or being deleted */
fil_space_t*
fil_space_acquire_silent(
ulint id)
{
return(fil_space_acquire_low(id, true));
}
/** Release a tablespace acquired with fil_space_acquire().
@param[in,out] space tablespace to release */
void
fil_space_release(
fil_space_t* space)
{
mutex_enter(&fil_system->mutex);
ut_ad(space->magic_n == FIL_SPACE_MAGIC_N);
ut_ad(space->n_pending_ops > 0);
space->n_pending_ops--;
mutex_exit(&fil_system->mutex);
}
/********************************************************//**
Creates the database directory for a table if it does not exist yet. */
void
fil_create_directory_for_tablename(
/*===============================*/
const char* name) /*!< in: name in the standard
'databasename/tablename' format */
{
const char* namend;
char* path;
ulint len;
len = strlen(fil_path_to_mysql_datadir);
namend = strchr(name, '/');
ut_a(namend);
path = static_cast<char*>(ut_malloc_nokey(len + (namend - name) + 2));
memcpy(path, fil_path_to_mysql_datadir, len);
path[len] = '/';
memcpy(path + len + 1, name, namend - name);
path[len + (namend - name) + 1] = 0;
os_normalize_path(path);
bool success = os_file_create_directory(path, false);
ut_a(success);
ut_free(path);
}
/** Write a log record about an operation on a tablespace file.
@param[in] type MLOG_FILE_NAME or MLOG_FILE_DELETE
or MLOG_FILE_CREATE2 or MLOG_FILE_RENAME2
@param[in] space_id tablespace identifier
@param[in] first_page_no first page number in the file
@param[in] path file path
@param[in] new_path if type is MLOG_FILE_RENAME2, the new name
@param[in] flags if type is MLOG_FILE_CREATE2, the space flags
@param[in,out] mtr mini-transaction */
static
void
fil_op_write_log(
mlog_id_t type,
ulint space_id,
ulint first_page_no,
const char* path,
const char* new_path,
ulint flags,
mtr_t* mtr)
{
byte* log_ptr;
ulint len;
ut_ad(first_page_no == 0);
/* fil_name_parse() requires that there be at least one path
separator and that the file path end with ".ibd". */
ut_ad(strchr(path, OS_PATH_SEPARATOR) != NULL);
ut_ad(strcmp(&path[strlen(path) - strlen(DOT_IBD)], DOT_IBD) == 0);
log_ptr = mlog_open(mtr, 11 + 4 + 2 + 1);
if (log_ptr == NULL) {
/* Logging in mtr is switched off during crash recovery:
in that case mlog_open returns NULL */
return;
}
log_ptr = mlog_write_initial_log_record_low(
type, space_id, first_page_no, log_ptr, mtr);
if (type == MLOG_FILE_CREATE2) {
mach_write_to_4(log_ptr, flags);
log_ptr += 4;
}
/* Let us store the strings as null-terminated for easier readability
and handling */
len = strlen(path) + 1;
mach_write_to_2(log_ptr, len);
log_ptr += 2;
mlog_close(mtr, log_ptr);
mlog_catenate_string(
mtr, reinterpret_cast<const byte*>(path), len);
switch (type) {
case MLOG_FILE_RENAME2:
ut_ad(strchr(new_path, OS_PATH_SEPARATOR) != NULL);
len = strlen(new_path) + 1;
log_ptr = mlog_open(mtr, 2 + len);
ut_a(log_ptr);
mach_write_to_2(log_ptr, len);
log_ptr += 2;
mlog_close(mtr, log_ptr);
mlog_catenate_string(
mtr, reinterpret_cast<const byte*>(new_path), len);
break;
case MLOG_FILE_NAME:
case MLOG_FILE_DELETE:
case MLOG_FILE_CREATE2:
break;
default:
ut_ad(0);
}
}
/** Write redo log for renaming a file.
@param[in] space_id tablespace id
@param[in] first_page_no first page number in the file
@param[in] old_name tablespace file name
@param[in] new_name tablespace file name after renaming
@param[in,out] mtr mini-transaction */
static
void
fil_name_write_rename(
ulint space_id,
ulint first_page_no,
const char* old_name,
const char* new_name,
mtr_t* mtr)
{
ut_ad(!is_predefined_tablespace(space_id));
fil_op_write_log(
MLOG_FILE_RENAME2,
space_id, first_page_no, old_name, new_name, 0, mtr);
}
/** Write MLOG_FILE_NAME for a file.
@param[in] space_id tablespace id
@param[in] first_page_no first page number in the file
@param[in] name tablespace file name
@param[in,out] mtr mini-transaction */
static
void
fil_name_write(
ulint space_id,
ulint first_page_no,
const char* name,
mtr_t* mtr)
{
fil_op_write_log(
MLOG_FILE_NAME, space_id, first_page_no, name, NULL, 0, mtr);
}
/** Write MLOG_FILE_NAME for a file.
@param[in] space tablespace
@param[in] first_page_no first page number in the file
@param[in] file tablespace file
@param[in,out] mtr mini-transaction */
static
void
fil_name_write(
const fil_space_t* space,
ulint first_page_no,
const fil_node_t* file,
mtr_t* mtr)
{
fil_name_write(space->id, first_page_no, file->name, mtr);
}
/********************************************************//**
Recreates table indexes by applying
TRUNCATE log record during recovery.
@return DB_SUCCESS or error code */
dberr_t
fil_recreate_table(
/*===============*/
ulint space_id, /*!< in: space id */
ulint format_flags, /*!< in: page format */
ulint flags, /*!< in: tablespace flags */
const char* name, /*!< in: table name */
truncate_t& truncate) /*!< in: The information of
TRUNCATE log record */
{
dberr_t err = DB_SUCCESS;
bool found;
const page_size_t page_size(fil_space_get_page_size(space_id,
&found));
if (!found) {
ib::info() << "Missing .ibd file for table '" << name
<< "' with tablespace " << space_id;
return(DB_ERROR);
}
ut_ad(!truncate_t::s_fix_up_active);
truncate_t::s_fix_up_active = true;
/* Step-1: Scan for active indexes from REDO logs and drop
all the indexes using low level function that take root_page_no
and space-id. */
truncate.drop_indexes(space_id);
/* Step-2: Scan for active indexes and re-create them. */
err = truncate.create_indexes(
name, space_id, page_size, flags, format_flags);
if (err != DB_SUCCESS) {
ib::info() << "Failed to create indexes for the table '"
<< name << "' with tablespace " << space_id
<< " while fixing up truncate action";
return(err);
}
truncate_t::s_fix_up_active = false;
return(err);
}
/********************************************************//**
Recreates the tablespace and table indexes by applying
TRUNCATE log record during recovery.
@return DB_SUCCESS or error code */
dberr_t
fil_recreate_tablespace(
/*====================*/
ulint space_id, /*!< in: space id */
ulint format_flags, /*!< in: page format */
ulint flags, /*!< in: tablespace flags */
const char* name, /*!< in: table name */
truncate_t& truncate, /*!< in: The information of
TRUNCATE log record */
lsn_t recv_lsn) /*!< in: the end LSN of
the log record */
{
dberr_t err = DB_SUCCESS;
mtr_t mtr;
ut_ad(!truncate_t::s_fix_up_active);
truncate_t::s_fix_up_active = true;
/* Step-1: Invalidate buffer pool pages belonging to the tablespace
to re-create. */
buf_LRU_flush_or_remove_pages(space_id, BUF_REMOVE_ALL_NO_WRITE, 0);
/* Remove all insert buffer entries for the tablespace */
ibuf_delete_for_discarded_space(space_id);
/* Step-2: truncate tablespace (reset the size back to original or
default size) of tablespace. */
err = truncate.truncate(
space_id, truncate.get_dir_path(), name, flags, true);
if (err != DB_SUCCESS) {
ib::info() << "Cannot access .ibd file for table '"
<< name << "' with tablespace " << space_id
<< " while truncating";
return(DB_ERROR);
}
bool found;
const page_size_t& page_size =
fil_space_get_page_size(space_id, &found);
if (!found) {
ib::info() << "Missing .ibd file for table '" << name
<< "' with tablespace " << space_id;
return(DB_ERROR);
}
/* Step-3: Initialize Header. */
if (page_size.is_compressed()) {
byte* buf;
page_t* page;
buf = static_cast<byte*>(ut_zalloc_nokey(3 * UNIV_PAGE_SIZE));
/* Align the memory for file i/o */
page = static_cast<byte*>(ut_align(buf, UNIV_PAGE_SIZE));
flags = fsp_flags_set_page_size(flags, univ_page_size);
fsp_header_init_fields(page, space_id, flags);
mach_write_to_4(
page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, space_id);
page_zip_des_t page_zip;
page_zip_set_size(&page_zip, page_size.physical());
page_zip.data = page + UNIV_PAGE_SIZE;
#ifdef UNIV_DEBUG
page_zip.m_start =
#endif /* UNIV_DEBUG */
page_zip.m_end = page_zip.m_nonempty = page_zip.n_blobs = 0;
buf_flush_init_for_writing(
NULL, page, &page_zip, 0,
fsp_is_checksum_disabled(space_id));
err = fil_write(page_id_t(space_id, 0), page_size, 0,
page_size.physical(), page_zip.data);
ut_free(buf);
if (err != DB_SUCCESS) {
ib::info() << "Failed to clean header of the"
" table '" << name << "' with tablespace "
<< space_id;
return(err);
}
}
mtr_start(&mtr);
/* Don't log the operation while fixing up table truncate operation
as crash at this level can still be sustained with recovery restarting
from last checkpoint. */
mtr_set_log_mode(&mtr, MTR_LOG_NO_REDO);
/* Initialize the first extent descriptor page and
the second bitmap page for the new tablespace. */
fsp_header_init(space_id, FIL_IBD_FILE_INITIAL_SIZE, &mtr);
mtr_commit(&mtr);
/* Step-4: Re-Create Indexes to newly re-created tablespace.
This operation will restore tablespace back to what it was
when it was created during CREATE TABLE. */
err = truncate.create_indexes(
name, space_id, page_size, flags, format_flags);
if (err != DB_SUCCESS) {
return(err);
}
/* Step-5: Write new created pages into ibd file handle and
flush it to disk for the tablespace, in case i/o-handler thread
deletes the bitmap page from buffer. */
mtr_start(&mtr);
mtr_set_log_mode(&mtr, MTR_LOG_NO_REDO);
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(space_id);
mutex_exit(&fil_system->mutex);
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
for (ulint page_no = 0; page_no < node->size; ++page_no) {
const page_id_t cur_page_id(space_id, page_no);
buf_block_t* block = buf_page_get(cur_page_id, page_size,
RW_X_LATCH, &mtr);
byte* page = buf_block_get_frame(block);
if (!fsp_flags_is_compressed(flags)) {
ut_ad(!page_size.is_compressed());
buf_flush_init_for_writing(
block, page, NULL, recv_lsn,
fsp_is_checksum_disabled(space_id));
err = fil_write(cur_page_id, page_size, 0,
page_size.physical(), page);
} else {
ut_ad(page_size.is_compressed());
/* We don't want to rewrite empty pages. */
if (fil_page_get_type(page) != 0) {
page_zip_des_t* page_zip =
buf_block_get_page_zip(block);
buf_flush_init_for_writing(
block, page, page_zip, recv_lsn,
fsp_is_checksum_disabled(space_id));
err = fil_write(cur_page_id, page_size, 0,
page_size.physical(),
page_zip->data);
} else {
#ifdef UNIV_DEBUG
const byte* data = block->page.zip.data;
/* Make sure that the page is really empty */
for (ulint i = 0;
i < page_size.physical();
++i) {
ut_a(data[i] == 0);
}
#endif /* UNIV_DEBUG */
}
}
if (err != DB_SUCCESS) {
ib::info() << "Cannot write page " << page_no
<< " into a .ibd file for table '"
<< name << "' with tablespace " << space_id;
}
}
mtr_commit(&mtr);
truncate_t::s_fix_up_active = false;
return(err);
}
/** Replay a file rename operation if possible.
@param[in] space_id tablespace identifier
@param[in] first_page_no first page number in the file
@param[in] name old file name
@param[in] new_name new file name
@return whether the operation was successfully applied
(the name did not exist, or new_name did not exist and
name was successfully renamed to new_name) */
bool
fil_op_replay_rename(
ulint space_id,
ulint first_page_no,
const char* name,
const char* new_name)
{
ut_ad(first_page_no == 0);
/* In order to replay the rename, the following must hold:
* The new name is not already used.
* A tablespace exists with the old name.
* The space ID for that tablepace matches this log entry.
This will prevent unintended renames during recovery. */
fil_space_t* space = fil_space_get(space_id);
if (space == NULL) {
return(true);
}
const bool name_match
= strcmp(name, UT_LIST_GET_FIRST(space->chain)->name) == 0;
if (!name_match) {
return(true);
}
/* Create the database directory for the new name, if
it does not exist yet */
const char* namend = strrchr(new_name, OS_PATH_SEPARATOR);
ut_a(namend != NULL);
char* dir = static_cast<char*>(
ut_malloc_nokey(namend - new_name + 1));
memcpy(dir, new_name, namend - new_name);
dir[namend - new_name] = '\0';
bool success = os_file_create_directory(dir, false);
ut_a(success);
ulint dirlen = 0;
if (const char* dirend = strrchr(dir, OS_PATH_SEPARATOR)) {
dirlen = dirend - dir + 1;
}
ut_free(dir);
/* New path must not exist. */
dberr_t err = fil_rename_tablespace_check(
space_id, name, new_name, false);
if (err != DB_SUCCESS) {
ib::error() << " Cannot replay file rename."
" Remove either file and try again.";
return(false);
}
char* new_table = mem_strdupl(
new_name + dirlen,
strlen(new_name + dirlen)
- 4 /* remove ".ibd" */);
ut_ad(new_table[namend - new_name - dirlen]
== OS_PATH_SEPARATOR);
#if OS_PATH_SEPARATOR != '/'
new_table[namend - new_name - dirlen] = '/';
#endif
if (!fil_rename_tablespace(
space_id, name, new_table, new_name)) {
ut_error;
}
ut_free(new_table);
return(true);
}
/** File operations for tablespace */
enum fil_operation_t {
FIL_OPERATION_DELETE, /*!< delete a single-table tablespace */
FIL_OPERATION_CLOSE, /*!< close a single-table tablespace */
FIL_OPERATION_TRUNCATE /*!< truncate a single-table tablespace */
};
/** Check for pending operations.
@param[in] space tablespace
@param[in] count number of attempts so far
@return 0 if no operations else count + 1. */
static
ulint
fil_check_pending_ops(
fil_space_t* space,
ulint count)
{
ut_ad(mutex_own(&fil_system->mutex));
const ulint n_pending_ops = space ? space->n_pending_ops : 0;
if (n_pending_ops) {
if (count > 5000) {
ib::warn() << "Trying to close/delete/truncate"
" tablespace '" << space->name
<< "' but there are " << n_pending_ops
<< " pending operations on it.";
}
return(count + 1);
}
return(0);
}
/*******************************************************************//**
Check for pending IO.
@return 0 if no pending else count + 1. */
static
ulint
fil_check_pending_io(
/*=================*/
fil_operation_t operation, /*!< in: File operation */
fil_space_t* space, /*!< in/out: Tablespace to check */
fil_node_t** node, /*!< out: Node in space list */
ulint count) /*!< in: number of attempts so far */
{
ut_ad(mutex_own(&fil_system->mutex));
ut_a(space->n_pending_ops == 0);
switch (operation) {
case FIL_OPERATION_DELETE:
case FIL_OPERATION_CLOSE:
break;
case FIL_OPERATION_TRUNCATE:
space->is_being_truncated = true;
break;
}
/* The following code must change when InnoDB supports
multiple datafiles per tablespace. */
ut_a(UT_LIST_GET_LEN(space->chain) == 1);
*node = UT_LIST_GET_FIRST(space->chain);
if (space->n_pending_flushes > 0 || (*node)->n_pending > 0) {
ut_a(!(*node)->being_extended);
if (count > 1000) {
ib::warn() << "Trying to delete/close/truncate"
" tablespace '" << space->name
<< "' but there are "
<< space->n_pending_flushes
<< " flushes and " << (*node)->n_pending
<< " pending i/o's on it.";
}
return(count + 1);
}
return(0);
}
/*******************************************************************//**
Check pending operations on a tablespace.
@return DB_SUCCESS or error failure. */
static
dberr_t
fil_check_pending_operations(
/*=========================*/
ulint id, /*!< in: space id */
fil_operation_t operation, /*!< in: File operation */
fil_space_t** space, /*!< out: tablespace instance
in memory */
char** path) /*!< out/own: tablespace path */
{
ulint count = 0;
ut_a(!is_system_tablespace(id));
ut_ad(space);
*space = 0;
mutex_enter(&fil_system->mutex);
fil_space_t* sp = fil_space_get_by_id(id);
if (sp) {
sp->stop_new_ops = true;
}
mutex_exit(&fil_system->mutex);
/* Check for pending operations. */
do {
mutex_enter(&fil_system->mutex);
sp = fil_space_get_by_id(id);
count = fil_check_pending_ops(sp, count);
mutex_exit(&fil_system->mutex);
if (count > 0) {
os_thread_sleep(20000);
}
} while (count > 0);
/* Check for pending IO. */
*path = 0;
do {
mutex_enter(&fil_system->mutex);
sp = fil_space_get_by_id(id);
if (sp == NULL) {
mutex_exit(&fil_system->mutex);
return(DB_TABLESPACE_NOT_FOUND);
}
fil_node_t* node;
count = fil_check_pending_io(operation, sp, &node, count);
if (count == 0) {
*path = mem_strdup(node->name);
}
mutex_exit(&fil_system->mutex);
if (count > 0) {
os_thread_sleep(20000);
}
} while (count > 0);
ut_ad(sp);
*space = sp;
return(DB_SUCCESS);
}
/*******************************************************************//**
Closes a single-table tablespace. The tablespace must be cached in the
memory cache. Free all pages used by the tablespace.
@return DB_SUCCESS or error */
dberr_t
fil_close_tablespace(
/*=================*/
trx_t* trx, /*!< in/out: Transaction covering the close */
ulint id) /*!< in: space id */
{
char* path = 0;
fil_space_t* space = 0;
dberr_t err;
ut_a(!is_system_tablespace(id));
err = fil_check_pending_operations(id, FIL_OPERATION_CLOSE,
&space, &path);
if (err != DB_SUCCESS) {
return(err);
}
ut_a(space);
ut_a(path != 0);
rw_lock_x_lock(&space->latch);
/* Invalidate in the buffer pool all pages belonging to the
tablespace. Since we have set space->stop_new_ops = true, readahead
or ibuf merge can no longer read more pages of this tablespace to the
buffer pool. Thus we can clean the tablespace out of the buffer pool
completely and permanently. The flag stop_new_ops also prevents
fil_flush() from being applied to this tablespace. */
buf_LRU_flush_or_remove_pages(id, BUF_REMOVE_FLUSH_WRITE, trx);
/* If the free is successful, the X lock will be released before
the space memory data structure is freed. */
if (!fil_space_free(id, true)) {
rw_lock_x_unlock(&space->latch);
err = DB_TABLESPACE_NOT_FOUND;
} else {
err = DB_SUCCESS;
}
/* If it is a delete then also delete any generated files, otherwise
when we drop the database the remove directory will fail. */
char* cfg_name = fil_make_filepath(path, NULL, CFG, false);
if (cfg_name != NULL) {
os_file_delete_if_exists(innodb_data_file_key, cfg_name, NULL);
ut_free(cfg_name);
}
ut_free(path);
return(err);
}
/** Deletes an IBD tablespace, either general or single-table.
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.
@param[in] space_id Tablespace id
@param[in] buf_remove Specify the action to take on the pages
for this table in the buffer pool.
@return DB_SUCCESS or error */
dberr_t
fil_delete_tablespace(
ulint id,
buf_remove_t buf_remove)
{
char* path = 0;
fil_space_t* space = 0;
ut_a(!is_system_tablespace(id));
dberr_t err = fil_check_pending_operations(
id, FIL_OPERATION_DELETE, &space, &path);
if (err != DB_SUCCESS) {
ib::error() << "Cannot delete tablespace " << id
<< " because it is not found in the tablespace"
" memory cache.";
return(err);
}
ut_a(space);
ut_a(path != 0);
/* IMPORTANT: Because we have set space::stop_new_ops there
can't be any new ibuf merges, reads or flushes. We are here
because node::n_pending was zero above. However, it is still
possible to have pending read and write requests:
A read request can happen because the reader thread has
gone through the ::stop_new_ops check in buf_page_init_for_read()
before the flag was set and has not yet incremented ::n_pending
when we checked it above.
A write request can be issued any time because we don't check
the ::stop_new_ops flag when queueing a block for write.
We deal with pending write requests in the following function
where we'd minimally evict all dirty pages belonging to this
space from the flush_list. Note that if a block is IO-fixed
we'll wait for IO to complete.
To deal with potential read requests, we will check the
::stop_new_ops flag in fil_io(). */
buf_LRU_flush_or_remove_pages(id, buf_remove, 0);
/* If it is a delete then also delete any generated files, otherwise
when we drop the database the remove directory will fail. */
{
/* Before deleting the file, write a log record about
it, so that InnoDB crash recovery will expect the file
to be gone. */
mtr_t mtr;
mtr_start(&mtr);
fil_op_write_log(MLOG_FILE_DELETE, id, 0, path, NULL, 0, &mtr);
mtr_commit(&mtr);
/* Even if we got killed shortly after deleting the
tablespace file, the record must have already been
written to the redo log. */
log_write_up_to(mtr.commit_lsn(), true);
char* cfg_name = fil_make_filepath(path, NULL, CFG, false);
if (cfg_name != NULL) {
os_file_delete_if_exists(innodb_data_file_key, cfg_name, NULL);
ut_free(cfg_name);
}
}
/* Delete the link file pointing to the ibd file we are deleting. */
if (FSP_FLAGS_HAS_DATA_DIR(space->flags)) {
RemoteDatafile::delete_link_file(space->name);
} else if (FSP_FLAGS_GET_SHARED(space->flags)) {
RemoteDatafile::delete_link_file(base_name(path));
}
mutex_enter(&fil_system->mutex);
/* Double check the sanity of pending ops after reacquiring
the fil_system::mutex. */
if (const fil_space_t* s = fil_space_get_by_id(id)) {
ut_a(s == space);
ut_a(space->n_pending_ops == 0);
ut_a(UT_LIST_GET_LEN(space->chain) == 1);
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
ut_a(node->n_pending == 0);
fil_space_detach(space);
mutex_exit(&fil_system->mutex);
log_mutex_enter();
if (space->max_lsn != 0) {
ut_d(space->max_lsn = 0);
UT_LIST_REMOVE(fil_system->named_spaces, space);
}
log_mutex_exit();
fil_space_free_low(space);
if (!os_file_delete(innodb_data_file_key, path)
&& !os_file_delete_if_exists(
innodb_data_file_key, path, NULL)) {
/* Note: This is because we have removed the
tablespace instance from the cache. */
err = DB_IO_ERROR;
}
} else {
mutex_exit(&fil_system->mutex);
err = DB_TABLESPACE_NOT_FOUND;
}
ut_free(path);
return(err);
}
/** Truncate the tablespace to needed size.
@param[in] space_id id of tablespace to truncate
@param[in] size_in_pages truncate size.
@return true if truncate was successful. */
bool
fil_truncate_tablespace(
ulint space_id,
ulint size_in_pages)
{
/* Step-1: Prepare tablespace for truncate. This involves
stopping all the new operations + IO on that tablespace
and ensuring that related pages are flushed to disk. */
if (fil_prepare_for_truncate(space_id) != DB_SUCCESS) {
return(false);
}
/* Step-2: Invalidate buffer pool pages belonging to the tablespace
to re-create. Remove all insert buffer entries for the tablespace */
buf_LRU_flush_or_remove_pages(space_id, BUF_REMOVE_ALL_NO_WRITE, 0);
/* Step-3: Truncate the tablespace and accordingly update
the fil_space_t handler that is used to access this tablespace. */
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(space_id);
/* The following code must change when InnoDB supports
multiple datafiles per tablespace. */
ut_a(UT_LIST_GET_LEN(space->chain) == 1);
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
ut_ad(node->is_open);
space->size = node->size = size_in_pages;
bool success = os_file_truncate(node->name, node->handle, 0);
if (success) {
os_offset_t size = size_in_pages * UNIV_PAGE_SIZE;
success = os_file_set_size(
node->name, node->handle, size, srv_read_only_mode);
if (success) {
space->stop_new_ops = false;
space->is_being_truncated = false;
}
}
mutex_exit(&fil_system->mutex);
return(success);
}
/*******************************************************************//**
Prepare for truncating a single-table tablespace.
1) Check pending operations on a tablespace;
2) Remove all insert buffer entries for the tablespace;
@return DB_SUCCESS or error */
dberr_t
fil_prepare_for_truncate(
/*=====================*/
ulint id) /*!< in: space id */
{
char* path = 0;
fil_space_t* space = 0;
ut_a(!is_system_tablespace(id));
dberr_t err = fil_check_pending_operations(
id, FIL_OPERATION_TRUNCATE, &space, &path);
ut_free(path);
if (err == DB_TABLESPACE_NOT_FOUND) {
ib::error() << "Cannot truncate tablespace " << id
<< " because it is not found in the tablespace"
" memory cache.";
}
return(err);
}
/**********************************************************************//**
Reinitialize the original tablespace header with the same space id
for single tablespace */
void
fil_reinit_space_header(
/*====================*/
ulint id, /*!< in: space id */
ulint size) /*!< in: size in blocks */
{
ut_a(!is_system_tablespace(id));
/* Invalidate in the buffer pool all pages belonging
to the tablespace */
buf_LRU_flush_or_remove_pages(id, BUF_REMOVE_ALL_NO_WRITE, 0);
/* Remove all insert buffer entries for the tablespace */
ibuf_delete_for_discarded_space(id);
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(id);
/* The following code must change when InnoDB supports
multiple datafiles per tablespace. */
ut_a(UT_LIST_GET_LEN(space->chain) == 1);
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
space->size = node->size = size;
mutex_exit(&fil_system->mutex);
mtr_t mtr;
mtr_start(&mtr);
mtr.set_named_space(id);
fsp_header_init(id, size, &mtr);
mtr_commit(&mtr);
}
#ifdef UNIV_DEBUG
/** Increase redo skipped count for a tablespace.
@param[in] id space id */
void
fil_space_inc_redo_skipped_count(
ulint id)
{
fil_space_t* space;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space != NULL);
space->redo_skipped_count++;
mutex_exit(&fil_system->mutex);
}
/** Decrease redo skipped count for a tablespace.
@param[in] id space id */
void
fil_space_dec_redo_skipped_count(
ulint id)
{
fil_space_t* space;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space != NULL);
ut_a(space->redo_skipped_count > 0);
space->redo_skipped_count--;
mutex_exit(&fil_system->mutex);
}
/**
Check whether a single-table tablespace is redo skipped.
@param[in] id space id
@return true if redo skipped */
bool
fil_space_is_redo_skipped(
ulint id)
{
fil_space_t* space;
bool is_redo_skipped;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space != NULL);
is_redo_skipped = space->redo_skipped_count > 0;
mutex_exit(&fil_system->mutex);
return(is_redo_skipped);
}
#endif /* UNIV_DEBUG */
/*******************************************************************//**
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. Free all the pages in use by the tablespace.
@return DB_SUCCESS or error */
dberr_t
fil_discard_tablespace(
/*===================*/
ulint id) /*!< in: space id */
{
dberr_t err;
switch (err = fil_delete_tablespace(id, BUF_REMOVE_ALL_NO_WRITE)) {
case DB_SUCCESS:
break;
case DB_IO_ERROR:
ib::warn() << "While deleting tablespace " << id
<< " in DISCARD TABLESPACE. File rename/delete"
" failed: " << ut_strerr(err);
break;
case DB_TABLESPACE_NOT_FOUND:
ib::warn() << "Cannot delete tablespace " << id
<< " in DISCARD TABLESPACE: " << ut_strerr(err);
break;
default:
ut_error;
}
/* Remove all insert buffer entries for the tablespace */
ibuf_delete_for_discarded_space(id);
return(err);
}
/*******************************************************************//**
Allocates and builds a file name from a path, a table or tablespace name
and a suffix. The string must be freed by caller with ut_free().
@param[in] path NULL or the direcory path or the full path and filename.
@param[in] name NULL if path is full, or Table/Tablespace name
@param[in] suffix NULL or the file extention to use.
@param[in] trim_name true if the last name on the path should be trimmed.
@return own: file name */
char*
fil_make_filepath(
const char* path,
const char* name,
ib_extention ext,
bool trim_name)
{
/* The path may contain the basename of the file, if so we do not
need the name. If the path is NULL, we can use the default path,
but there needs to be a name. */
ut_ad(path != NULL || name != NULL);
/* If we are going to strip a name off the path, there better be a
path and a new name to put back on. */
ut_ad(!trim_name || (path != NULL && name != NULL));
if (path == NULL) {
path = fil_path_to_mysql_datadir;
}
ulint len = 0; /* current length */
ulint path_len = strlen(path);
ulint name_len = (name ? strlen(name) : 0);
const char* suffix = dot_ext[ext];
ulint suffix_len = strlen(suffix);
ulint full_len = path_len + 1 + name_len + suffix_len + 1;
char* full_name = static_cast<char*>(ut_malloc_nokey(full_len));
if (full_name == NULL) {
return NULL;
}
/* If the name is a relative path, do not prepend "./". */
if (path[0] == '.'
&& (path[1] == '\0' || path[1] == OS_PATH_SEPARATOR)
&& name != NULL && name[0] == '.') {
path = NULL;
path_len = 0;
}
if (path != NULL) {
memcpy(full_name, path, path_len);
len = path_len;
full_name[len] = '\0';
os_normalize_path(full_name);
}
if (trim_name) {
/* Find the offset of the last DIR separator and set it to
null in order to strip off the old basename from this path. */
char* last_dir_sep = strrchr(full_name, OS_PATH_SEPARATOR);
if (last_dir_sep) {
last_dir_sep[0] = '\0';
len = strlen(full_name);
}
}
if (name != NULL) {
if (len && full_name[len - 1] != OS_PATH_SEPARATOR) {
/* Add a DIR separator */
full_name[len] = OS_PATH_SEPARATOR;
full_name[++len] = '\0';
}
char* ptr = &full_name[len];
memcpy(ptr, name, name_len);
len += name_len;
full_name[len] = '\0';
os_normalize_path(ptr);
}
/* Make sure that the specified suffix is at the end of the filepath
string provided. This assumes that the suffix starts with '.'.
If the first char of the suffix is found in the filepath at the same
length as the suffix from the end, then we will assume that there is
a previous suffix that needs to be replaced. */
if (suffix != NULL) {
/* Need room for the trailing null byte. */
ut_ad(len < full_len);
if ((len > suffix_len)
&& (full_name[len - suffix_len] == suffix[0])) {
/* Another suffix exists, make it the one requested. */
memcpy(&full_name[len - suffix_len], suffix, suffix_len);
} else {
/* No previous suffix, add it. */
ut_ad(len + suffix_len < full_len);
memcpy(&full_name[len], suffix, suffix_len);
full_name[len + suffix_len] = '\0';
}
}
return(full_name);
}
/** Test if a tablespace file can be renamed to a new filepath by checking
if that the old filepath exists and the new filepath does not exist.
@param[in] space_id tablespace id
@param[in] old_path old filepath
@param[in] new_path new filepath
@param[in] is_discarded whether the tablespace is discarded
@return innodb error code */
dberr_t
fil_rename_tablespace_check(
ulint space_id,
const char* old_path,
const char* new_path,
bool is_discarded)
{
bool exists = false;
os_file_type_t ftype;
if (!is_discarded
&& os_file_status(old_path, &exists, &ftype)
&& !exists) {
ib::error() << "Cannot rename '" << old_path
<< "' to '" << new_path
<< "' for space ID " << space_id
<< " because the source file"
<< " does not exist.";
return(DB_TABLESPACE_NOT_FOUND);
}
exists = false;
if (!os_file_status(new_path, &exists, &ftype) || exists) {
ib::error() << "Cannot rename '" << old_path
<< "' to '" << new_path
<< "' for space ID " << space_id
<< " because the target file exists."
" Remove the target file and try again.";
return(DB_TABLESPACE_EXISTS);
}
return(DB_SUCCESS);
}
/** Rename a single-table tablespace.
The tablespace must exist in the memory cache.
@param[in] id tablespace identifier
@param[in] old_path old file name
@param[in] new_name new table name in the
databasename/tablename format
@param[in] new_path_in new file name,
or NULL if it is located in the normal data directory
@return true if success */
bool
fil_rename_tablespace(
ulint id,
const char* old_path,
const char* new_name,
const char* new_path_in)
{
bool sleep = false;
bool flush = false;
fil_space_t* space;
fil_node_t* node;
ulint count = 0;
ut_a(id != 0);
ut_ad(strchr(new_name, '/') != NULL);
retry:
count++;
if (!(count % 1000)) {
ib::warn() << "Cannot rename file " << old_path
<< " (space id " << id << "), retried " << count
<< " times."
" There are either pending IOs or flushes or"
" the file is being extended.";
}
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
DBUG_EXECUTE_IF("fil_rename_tablespace_failure_1", space = NULL; );
if (space == NULL) {
ib::error() << "Cannot find space id " << id
<< " in the tablespace memory cache, though the file '"
<< old_path
<< "' in a rename operation should have that id.";
func_exit:
mutex_exit(&fil_system->mutex);
return(false);
}
if (count > 25000) {
space->stop_ios = false;
goto func_exit;
}
if (space != fil_space_get_by_name(space->name)) {
ib::error() << "Cannot find " << space->name
<< " in tablespace memory cache";
space->stop_ios = false;
goto func_exit;
}
if (fil_space_get_by_name(new_name)) {
ib::error() << new_name
<< " is already in tablespace memory cache";
space->stop_ios = false;
goto func_exit;
}
/* We temporarily close the .ibd file because we do not trust that
operating systems can rename an open file. For the closing we have to
wait until there are no pending i/o's or flushes on the file. */
space->stop_ios = true;
/* The following code must change when InnoDB supports
multiple datafiles per tablespace. */
ut_a(UT_LIST_GET_LEN(space->chain) == 1);
node = UT_LIST_GET_FIRST(space->chain);
if (node->n_pending > 0
|| node->n_pending_flushes > 0
|| node->being_extended) {
/* There are pending i/o's or flushes or the file is
currently being extended, sleep for a while and
retry */
sleep = true;
} else if (node->modification_counter > node->flush_counter) {
/* Flush the space */
sleep = flush = true;
} else if (node->is_open) {
/* Close the file */
fil_node_close_file(node);
}
mutex_exit(&fil_system->mutex);
if (sleep) {
os_thread_sleep(20000);
if (flush) {
fil_flush(id);
}
sleep = flush = false;
goto retry;
}
ut_ad(space->stop_ios);
char* new_file_name = new_path_in == NULL
? fil_make_filepath(NULL, new_name, IBD, false)
: mem_strdup(new_path_in);
char* old_file_name = node->name;
char* new_space_name = mem_strdup(new_name);
char* old_space_name = space->name;
ulint old_fold = ut_fold_string(old_space_name);
ulint new_fold = ut_fold_string(new_space_name);
ut_ad(strchr(old_file_name, OS_PATH_SEPARATOR) != NULL);
ut_ad(strchr(new_file_name, OS_PATH_SEPARATOR) != NULL);
if (!recv_recovery_on) {
mtr_t mtr;
mtr.start();
fil_name_write_rename(
id, 0, old_file_name, new_file_name, &mtr);
mtr.commit();
log_mutex_enter();
}
/* log_sys->mutex is above fil_system->mutex in the latching order */
ut_ad(log_mutex_own());
mutex_enter(&fil_system->mutex);
ut_ad(space->name == old_space_name);
/* We already checked these. */
ut_ad(space == fil_space_get_by_name(old_space_name));
ut_ad(!fil_space_get_by_name(new_space_name));
ut_ad(node->name == old_file_name);
bool success;
DBUG_EXECUTE_IF("fil_rename_tablespace_failure_2",
goto skip_rename; );
success = os_file_rename(
innodb_data_file_key, old_file_name, new_file_name);
DBUG_EXECUTE_IF("fil_rename_tablespace_failure_2",
skip_rename: success = false; );
ut_ad(node->name == old_file_name);
if (success) {
node->name = new_file_name;
}
if (!recv_recovery_on) {
log_mutex_exit();
}
ut_ad(space->name == old_space_name);
if (success) {
HASH_DELETE(fil_space_t, name_hash, fil_system->name_hash,
old_fold, space);
space->name = new_space_name;
HASH_INSERT(fil_space_t, name_hash, fil_system->name_hash,
new_fold, space);
} else {
/* Because nothing was renamed, we must free the new
names, not the old ones. */
old_file_name = new_file_name;
old_space_name = new_space_name;
}
ut_ad(space->stop_ios);
space->stop_ios = false;
mutex_exit(&fil_system->mutex);
ut_free(old_file_name);
ut_free(old_space_name);
return(success);
}
/** Create a new General or Single-Table tablespace
@param[in] space_id Tablespace ID
@param[in] name Tablespace name in dbname/tablename format.
For general tablespaces, the 'dbname/' part may be missing.
@param[in] path Path and filename of the datafile to create.
@param[in] flags Tablespace flags
@param[in] size Initial size of the tablespace file in
pages, must be >= FIL_IBD_FILE_INITIAL_SIZE
@param[in] mode MariaDB encryption mode
@param[in] key_id MariaDB encryption key_id
@return DB_SUCCESS or error code */
dberr_t
fil_ibd_create(
ulint space_id,
const char* name,
const char* path,
ulint flags,
ulint size,
fil_encryption_t mode,
ulint key_id)
{
os_file_t file;
dberr_t err;
byte* buf2;
byte* page;
bool success;
bool is_temp = FSP_FLAGS_GET_TEMPORARY(flags);
bool has_data_dir = FSP_FLAGS_HAS_DATA_DIR(flags);
bool has_shared_space = FSP_FLAGS_GET_SHARED(flags);
fil_space_t* space = NULL;
fil_space_crypt_t *crypt_data = NULL;
ut_ad(!is_system_tablespace(space_id));
ut_ad(!srv_read_only_mode);
ut_a(space_id < SRV_LOG_SPACE_FIRST_ID);
ut_a(size >= FIL_IBD_FILE_INITIAL_SIZE);
ut_a(fsp_flags_is_valid(flags));
/* Create the subdirectories in the path, if they are
not there already. */
if (!has_shared_space) {
err = os_file_create_subdirs_if_needed(path);
if (err != DB_SUCCESS) {
return(err);
}
}
file = os_file_create(
innodb_data_file_key, path,
OS_FILE_CREATE | OS_FILE_ON_ERROR_NO_EXIT,
OS_FILE_NORMAL,
OS_DATA_FILE,
srv_read_only_mode,
&success);
if (!success) {
/* The following call will print an error message */
ulint error = os_file_get_last_error(true);
ib::error() << "Cannot create file '" << path << "'";
if (error == OS_FILE_ALREADY_EXISTS) {
ib::error() << "The file '" << path << "'"
" already exists though the"
" corresponding table did not exist"
" in the InnoDB data dictionary."
" Have you moved InnoDB .ibd files"
" around without using the SQL commands"
" DISCARD TABLESPACE and IMPORT TABLESPACE,"
" or did mysqld crash in the middle of"
" CREATE TABLE?"
" You can resolve the problem by removing"
" the file '" << path
<< "' under the 'datadir' of MySQL.";
return(DB_TABLESPACE_EXISTS);
}
if (error == OS_FILE_DISK_FULL) {
return(DB_OUT_OF_FILE_SPACE);
}
return(DB_ERROR);
}
success= false;
#ifdef HAVE_POSIX_FALLOCATE
/*
Extend the file using posix_fallocate(). This is required by
FusionIO HW/Firmware but should also be the prefered way to extend
a file.
*/
int ret = posix_fallocate(file, 0, size * UNIV_PAGE_SIZE);
if (ret != 0) {
ib::error() <<
"posix_fallocate(): Failed to preallocate"
" data for file " << path
<< ", desired size "
<< size * UNIV_PAGE_SIZE
<< " Operating system error number " << ret
<< ". Check"
" that the disk is not full or a disk quota"
" exceeded. Make sure the file system supports"
" this function. Some operating system error"
" numbers are described at " REFMAN
" operating-system-error-codes.html";
} else {
success = true;
}
#endif /* HAVE_POSIX_FALLOCATE */
if (!success)
{
success = os_file_set_size(
path, file, size * UNIV_PAGE_SIZE, srv_read_only_mode);
}
if (!success) {
os_file_close(file);
os_file_delete(innodb_data_file_key, path);
return(DB_OUT_OF_FILE_SPACE);
}
/* Note: We are actually punching a hole, previous contents will
be lost after this call, if it succeeds. In this case the file
should be full of NULs. */
bool punch_hole = os_is_sparse_file_supported(path, file);
if (punch_hole) {
dberr_t punch_err;
punch_err = os_file_punch_hole(file, 0, size * UNIV_PAGE_SIZE);
if (punch_err != DB_SUCCESS) {
punch_hole = false;
}
}
/* printf("Creating tablespace %s id %lu\n", path, space_id); */
/* We have to write the space id to the file immediately and flush the
file to disk. This is because in crash recovery we must be aware what
tablespaces exist and what are their space id's, so that we can apply
the log records to the right file. It may take quite a while until
buffer pool flush algorithms write anything to the file and flush it to
disk. If we would not write here anything, the file would be filled
with zeros from the call of os_file_set_size(), until a buffer pool
flush would write to it. */
buf2 = static_cast<byte*>(ut_malloc_nokey(3 * UNIV_PAGE_SIZE));
/* Align the memory for file i/o if we might have O_DIRECT set */
page = static_cast<byte*>(ut_align(buf2, UNIV_PAGE_SIZE));
memset(page, '\0', UNIV_PAGE_SIZE);
/* Add the UNIV_PAGE_SIZE to the table flags and write them to the
tablespace header. */
flags = fsp_flags_set_page_size(flags, univ_page_size);
fsp_header_init_fields(page, space_id, flags);
mach_write_to_4(page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, space_id);
const page_size_t page_size(flags);
IORequest request(IORequest::WRITE);
if (!page_size.is_compressed()) {
buf_flush_init_for_writing(
NULL, page, NULL, 0,
fsp_is_checksum_disabled(space_id));
err = os_file_write(
request, path, file, page, 0, page_size.physical());
ut_ad(err != DB_IO_NO_PUNCH_HOLE);
} else {
page_zip_des_t page_zip;
page_zip_set_size(&page_zip, page_size.physical());
page_zip.data = page + UNIV_PAGE_SIZE;
#ifdef UNIV_DEBUG
page_zip.m_start =
#endif /* UNIV_DEBUG */
page_zip.m_end = page_zip.m_nonempty =
page_zip.n_blobs = 0;
buf_flush_init_for_writing(
NULL, page, &page_zip, 0,
fsp_is_checksum_disabled(space_id));
err = os_file_write(
request, path, file, page_zip.data, 0,
page_size.physical());
ut_a(err != DB_IO_NO_PUNCH_HOLE);
punch_hole = false;
}
ut_free(buf2);
if (err != DB_SUCCESS) {
ib::error()
<< "Could not write the first page to"
<< " tablespace '" << path << "'";
os_file_close(file);
os_file_delete(innodb_data_file_key, path);
return(DB_ERROR);
}
success = os_file_flush(file);
if (!success) {
ib::error() << "File flush of tablespace '"
<< path << "' failed";
os_file_close(file);
os_file_delete(innodb_data_file_key, path);
return(DB_ERROR);
}
if (has_data_dir || has_shared_space) {
/* Make the ISL file if the IBD file is not
in the default location. */
err = RemoteDatafile::create_link_file(name, path,
has_shared_space);
if (err != DB_SUCCESS) {
os_file_close(file);
os_file_delete(innodb_data_file_key, path);
return(err);
}
}
/* Create crypt data if the tablespace is either encrypted or user has
requested it to remain unencrypted. */
if (mode == FIL_SPACE_ENCRYPTION_ON || mode == FIL_SPACE_ENCRYPTION_OFF ||
srv_encrypt_tables) {
crypt_data = fil_space_create_crypt_data(mode, key_id);
}
space = fil_space_create(name, space_id, flags, is_temp
? FIL_TYPE_TEMPORARY : FIL_TYPE_TABLESPACE,
crypt_data, true);
if (!fil_node_create_low(
path, size, space, false, punch_hole, TRUE)) {
if (crypt_data) {
free(crypt_data);
}
err = DB_ERROR;
goto error_exit_1;
}
#ifdef MYSQL_ENCRYPTION
/* For encryption tablespace, initial encryption information. */
if (FSP_FLAGS_GET_ENCRYPTION(space->flags)) {
err = fil_set_encryption(space->id,
Encryption::AES,
NULL,
NULL);
ut_ad(err == DB_SUCCESS);
}
#endif /* MYSQL_ENCRYPTION */
if (!is_temp) {
mtr_t mtr;
const fil_node_t* file = UT_LIST_GET_FIRST(space->chain);
mtr_start(&mtr);
fil_op_write_log(
MLOG_FILE_CREATE2, space_id, 0, file->name,
NULL, space->flags, &mtr);
fil_name_write(space, 0, file, &mtr);
mtr_commit(&mtr);
}
err = DB_SUCCESS;
/* Error code is set. Cleanup the various variables used.
These labels reflect the order in which variables are assigned or
actions are done. */
error_exit_1:
if (err != DB_SUCCESS && (has_data_dir || has_shared_space)) {
RemoteDatafile::delete_link_file(name);
}
os_file_close(file);
if (err != DB_SUCCESS) {
os_file_delete(innodb_data_file_key, path);
}
return(err);
}
/** Try to open a single-table tablespace and optionally check that the
space id in it is correct. If this does not succeed, print an error message
to the .err log. This function is used to open a tablespace when we start
mysqld after the dictionary has been booted, 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.
If the validate boolean is set, we read the first page of the file and
check that the space id in the file is what we expect. 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. This boolean may be initially false, but if
a remote tablespace is found it will be changed to true.
If the fix_dict boolean is set, then it is safe to use an internal SQL
statement to update the dictionary tables if they are incorrect.
@param[in] validate true if we should validate the tablespace
@param[in] fix_dict true if the dictionary is available to be fixed
@param[in] purpose FIL_TYPE_TABLESPACE or FIL_TYPE_TEMPORARY
@param[in] id tablespace ID
@param[in] flags tablespace flags
@param[in] space_name tablespace name of the datafile
If file-per-table, it is the table name in the databasename/tablename format
@param[in] path_in expected filepath, usually read from dictionary
@return DB_SUCCESS or error code */
dberr_t
fil_ibd_open(
bool validate,
bool fix_dict,
fil_type_t purpose,
ulint id,
ulint flags,
const char* space_name,
const char* path_in,
dict_table_t* table)
{
dberr_t err = DB_SUCCESS;
bool dict_filepath_same_as_default = false;
bool link_file_found = false;
bool link_file_is_bad = false;
bool is_shared = FSP_FLAGS_GET_SHARED(flags);
bool is_encrypted = FSP_FLAGS_GET_ENCRYPTION(flags);
Datafile df_default; /* default location */
Datafile df_dict; /* dictionary location */
RemoteDatafile df_remote; /* remote location */
ulint tablespaces_found = 0;
ulint valid_tablespaces_found = 0;
bool for_import = (purpose == FIL_TYPE_IMPORT);
ut_ad(!fix_dict || rw_lock_own(dict_operation_lock, RW_LOCK_X));
ut_ad(!fix_dict || mutex_own(&dict_sys->mutex));
ut_ad(!fix_dict || !srv_read_only_mode);
ut_ad(!fix_dict || srv_log_file_size != 0);
ut_ad(fil_type_is_data(purpose));
if (!fsp_flags_is_valid(flags)) {
return(DB_CORRUPTION);
}
df_default.init(space_name, flags);
df_dict.init(space_name, flags);
df_remote.init(space_name, flags);
/* Discover the correct file by looking in three possible locations
while avoiding unecessary effort. */
if (is_shared) {
/* Shared tablespaces will have a path_in since the filename
is not generated from the tablespace name. Use the basename
from this path_in with the default datadir as a filepath to
the default location */
ut_a(path_in);
const char* sep = strrchr(path_in, OS_PATH_SEPARATOR);
const char* basename = (sep == NULL) ? path_in : &sep[1];
df_default.make_filepath(NULL, basename, IBD);
/* Always validate shared tablespaces. */
validate = true;
/* Set the ISL filepath in the default location. */
df_remote.set_link_filepath(path_in);
} else {
/* We will always look for an ibd in the default location. */
df_default.make_filepath(NULL, space_name, IBD);
}
/* Look for a filepath embedded in an ISL where the default file
would be. */
if (df_remote.open_read_only(true) == DB_SUCCESS) {
ut_ad(df_remote.is_open());
/* Always validate a file opened from an ISL pointer */
validate = true;
++tablespaces_found;
link_file_found = true;
if (table) {
table->crypt_data = df_remote.get_crypt_info();
table->page_0_read = true;
}
} else if (df_remote.filepath() != NULL) {
/* An ISL file was found but contained a bad filepath in it.
Better validate anything we do find. */
validate = true;
}
/* Attempt to open the tablespace at the dictionary filepath. */
if (path_in) {
if (df_default.same_filepath_as(path_in)) {
dict_filepath_same_as_default = true;
} else {
/* Dict path is not the default path. Always validate
remote files. If default is opened, it was moved. */
validate = true;
df_dict.set_filepath(path_in);
if (df_dict.open_read_only(true) == DB_SUCCESS) {
ut_ad(df_dict.is_open());
++tablespaces_found;
if (table) {
table->crypt_data = df_dict.get_crypt_info();
table->page_0_read = true;
}
}
}
}
/* Always look for a file at the default location. But don't log
an error if the tablespace is already open in remote or dict. */
ut_a(df_default.filepath());
const bool strict = (tablespaces_found == 0);
if (df_default.open_read_only(strict) == DB_SUCCESS) {
ut_ad(df_default.is_open());
++tablespaces_found;
if (table) {
table->crypt_data = df_default.get_crypt_info();
table->page_0_read = true;
}
}
/* Check if multiple locations point to the same file. */
if (tablespaces_found > 1 && df_default.same_as(df_remote)) {
/* A link file was found with the default path in it.
Use the default path and delete the link file. */
--tablespaces_found;
df_remote.delete_link_file();
df_remote.close();
}
if (tablespaces_found > 1 && df_default.same_as(df_dict)) {
--tablespaces_found;
df_dict.close();
}
if (tablespaces_found > 1 && df_remote.same_as(df_dict)) {
--tablespaces_found;
df_dict.close();
}
/* We have now checked all possible tablespace locations and
have a count of how many unique files we found. If things are
normal, we only found 1. */
/* For encrypted tablespace, we need to check the
encryption in header of first page. */
if (!validate && tablespaces_found == 1 && !is_encrypted) {
goto skip_validate;
}
/* Read and validate the first page of these three tablespace
locations, if found. */
valid_tablespaces_found +=
(df_remote.validate_to_dd(id, flags, for_import)
== DB_SUCCESS) ? 1 : 0;
valid_tablespaces_found +=
(df_default.validate_to_dd(id, flags, for_import)
== DB_SUCCESS) ? 1 : 0;
valid_tablespaces_found +=
(df_dict.validate_to_dd(id, flags, for_import)
== DB_SUCCESS) ? 1 : 0;
/* Make sense of these three possible locations.
First, bail out if no tablespace files were found. */
if (valid_tablespaces_found == 0) {
if (!is_encrypted) {
/* The following call prints an error message.
For encrypted tablespace we skip print, since it should
be keyring plugin issues. */
os_file_get_last_error(true);
ib::error() << "Could not find a valid tablespace file for `"
<< space_name << "`. " << TROUBLESHOOT_DATADICT_MSG;
}
return(DB_CORRUPTION);
}
if (!validate && !is_encrypted) {
return(DB_SUCCESS);
}
if (validate && is_encrypted && fil_space_get(id)) {
return(DB_SUCCESS);
}
/* Do not open any tablespaces if more than one tablespace with
the correct space ID and flags were found. */
if (tablespaces_found > 1) {
ib::error() << "A tablespace for `" << space_name
<< "` has been found in multiple places;";
if (df_default.is_open()) {
ib::error() << "Default location: "
<< df_default.filepath()
<< ", Space ID=" << df_default.space_id()
<< ", Flags=" << df_default.flags();
}
if (df_remote.is_open()) {
ib::error() << "Remote location: "
<< df_remote.filepath()
<< ", Space ID=" << df_remote.space_id()
<< ", Flags=" << df_remote.flags();
}
if (df_dict.is_open()) {
ib::error() << "Dictionary location: "
<< df_dict.filepath()
<< ", Space ID=" << df_dict.space_id()
<< ", Flags=" << df_dict.flags();
}
/* Force-recovery will allow some tablespaces to be
skipped by REDO if there was more than one file found.
Unlike during the REDO phase of recovery, we now know
if the tablespace is valid according to the dictionary,
which was not available then. So if we did not force
recovery and there is only one good tablespace, ignore
any bad tablespaces. */
if (valid_tablespaces_found > 1 || srv_force_recovery > 0) {
ib::error() << "Will not open tablespace `"
<< space_name << "`";
/* If the file is not open it cannot be valid. */
ut_ad(df_default.is_open() || !df_default.is_valid());
ut_ad(df_dict.is_open() || !df_dict.is_valid());
ut_ad(df_remote.is_open() || !df_remote.is_valid());
/* Having established that, this is an easy way to
look for corrupted data files. */
if (df_default.is_open() != df_default.is_valid()
|| df_dict.is_open() != df_dict.is_valid()
|| df_remote.is_open() != df_remote.is_valid()) {
return(DB_CORRUPTION);
}
return(DB_ERROR);
}
/* There is only one valid tablespace found and we did
not use srv_force_recovery during REDO. Use this one
tablespace and clean up invalid tablespace pointers */
if (df_default.is_open() && !df_default.is_valid()) {
df_default.close();
tablespaces_found--;
}
if (df_dict.is_open() && !df_dict.is_valid()) {
df_dict.close();
/* Leave dict.filepath so that SYS_DATAFILES
can be corrected below. */
tablespaces_found--;
}
if (df_remote.is_open() && !df_remote.is_valid()) {
df_remote.close();
tablespaces_found--;
link_file_is_bad = true;
}
}
/* At this point, there should be only one filepath. */
ut_a(tablespaces_found == 1);
ut_a(valid_tablespaces_found == 1);
/* Only fix the dictionary at startup when there is only one thread.
Calls to dict_load_table() can be done while holding other latches. */
if (!fix_dict) {
goto skip_validate;
}
/* We may need to update what is stored in SYS_DATAFILES or
SYS_TABLESPACES or adjust the link file. Since a failure to
update SYS_TABLESPACES or SYS_DATAFILES does not prevent opening
and using the tablespace either this time or the next, we do not
check the return code or fail to open the tablespace. But if it
fails, dict_update_filepath() will issue a warning to the log. */
if (df_dict.filepath()) {
ut_ad(path_in != NULL);
ut_ad(df_dict.same_filepath_as(path_in));
if (df_remote.is_open()) {
if (!df_remote.same_filepath_as(path_in)) {
dict_update_filepath(id, df_remote.filepath());
}
} else if (df_default.is_open()) {
ut_ad(!dict_filepath_same_as_default);
dict_update_filepath(id, df_default.filepath());
if (link_file_is_bad) {
RemoteDatafile::delete_link_file(space_name);
}
} else if (!is_shared
&& (!link_file_found || link_file_is_bad)) {
ut_ad(df_dict.is_open());
/* Fix the link file if we got our filepath
from the dictionary but a link file did not
exist or it did not point to a valid file. */
RemoteDatafile::delete_link_file(space_name);
RemoteDatafile::create_link_file(
space_name, df_dict.filepath());
}
} else if (df_remote.is_open()) {
if (dict_filepath_same_as_default) {
dict_update_filepath(id, df_remote.filepath());
} else if (path_in == NULL) {
/* SYS_DATAFILES record for this space ID
was not found. */
dict_replace_tablespace_and_filepath(
id, space_name, df_remote.filepath(), flags);
}
} else if (df_default.is_open()) {
/* We opened the tablespace in the default location.
SYS_DATAFILES.PATH needs to be updated if it is different
from this default path or if the SYS_DATAFILES.PATH was not
supplied and it should have been. Also update the dictionary
if we found an ISL file (since !df_remote.is_open). Since
path_in is not suppled for file-per-table, we must assume
that it matched the ISL. */
if ((path_in != NULL && !dict_filepath_same_as_default)
|| (path_in == NULL
&& (DICT_TF_HAS_DATA_DIR(flags)
|| DICT_TF_HAS_SHARED_SPACE(flags)))
|| df_remote.filepath() != NULL) {
dict_replace_tablespace_and_filepath(
id, space_name, df_default.filepath(), flags);
}
}
skip_validate:
if (err == DB_SUCCESS) {
fil_space_t* space = fil_space_create(
space_name, id, flags, purpose,
df_remote.is_open() ? df_remote.get_crypt_info() :
df_dict.is_open() ? df_dict.get_crypt_info() :
df_default.get_crypt_info(), false);
/* We do not measure the size of the file, that is why
we pass the 0 below */
if (fil_node_create_low(
df_remote.is_open() ? df_remote.filepath() :
df_dict.is_open() ? df_dict.filepath() :
df_default.filepath(), 0, space, false,
true, TRUE) == NULL) {
err = DB_ERROR;
}
#ifdef MYSQL_ENCRYPTION
/* For encryption tablespace, initialize encryption
information.*/
if (err == DB_SUCCESS && is_encrypted && !for_import) {
Datafile& df_current = df_remote.is_open() ?
df_remote: df_dict.is_open() ?
df_dict : df_default;
byte* key = df_current.m_encryption_key;
byte* iv = df_current.m_encryption_iv;
ut_ad(key && iv);
err = fil_set_encryption(space->id, Encryption::AES,
key, iv);
ut_ad(err == DB_SUCCESS);
}
#endif /* MYSQL_ENCRYPTION */
}
return(err);
}
/** Looks for a pre-existing fil_space_t with the given tablespace ID
and, if found, returns the name and filepath in newly allocated buffers
that the caller must free.
@param[in] space_id The tablespace ID to search for.
@param[out] name Name of the tablespace found.
@param[out] filepath The filepath of the first datafile for the
tablespace.
@return true if tablespace is found, false if not. */
bool
fil_space_read_name_and_filepath(
ulint space_id,
char** name,
char** filepath)
{
bool success = false;
*name = NULL;
*filepath = NULL;
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(space_id);
if (space != NULL) {
*name = mem_strdup(space->name);
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
*filepath = mem_strdup(node->name);
success = true;
}
mutex_exit(&fil_system->mutex);
return(success);
}
/** Convert a file name to a tablespace name.
@param[in] filename directory/databasename/tablename.ibd
@return database/tablename string, to be freed with ut_free() */
char*
fil_path_to_space_name(
const char* filename)
{
/* Strip the file name prefix and suffix, leaving
only databasename/tablename. */
ulint filename_len = strlen(filename);
const char* end = filename + filename_len;
#ifdef HAVE_MEMRCHR
const char* tablename = 1 + static_cast<const char*>(
memrchr(filename, OS_PATH_SEPARATOR,
filename_len));
const char* dbname = 1 + static_cast<const char*>(
memrchr(filename, OS_PATH_SEPARATOR,
tablename - filename - 1));
#else /* HAVE_MEMRCHR */
const char* tablename = filename;
const char* dbname = NULL;
while (const char* t = static_cast<const char*>(
memchr(tablename, OS_PATH_SEPARATOR,
end - tablename))) {
dbname = tablename;
tablename = t + 1;
}
#endif /* HAVE_MEMRCHR */
ut_ad(dbname != NULL);
ut_ad(tablename > dbname);
ut_ad(tablename < end);
ut_ad(end - tablename > 4);
ut_ad(memcmp(end - 4, DOT_IBD, 4) == 0);
char* name = mem_strdupl(dbname, end - dbname - 4);
ut_ad(name[tablename - dbname - 1] == OS_PATH_SEPARATOR);
#if OS_PATH_SEPARATOR != '/'
/* space->name uses '/', not OS_PATH_SEPARATOR. */
name[tablename - dbname - 1] = '/';
#endif
return(name);
}
/** Discover the correct IBD file to open given a remote or missing
filepath from the REDO log. Administrators can move a crashed
database to another location on the same machine and try to recover it.
Remote IBD files might be moved as well to the new location.
The problem with this is that the REDO log contains the old location
which may be still accessible. During recovery, if files are found in
both locations, we can chose on based on these priorities;
1. Default location
2. ISL location
3. REDO location
@param[in] space_id tablespace ID
@param[in] df Datafile object with path from redo
@return true if a valid datafile was found, false if not */
static
bool
fil_ibd_discover(
ulint space_id,
Datafile& df)
{
Datafile df_def_gen; /* default general datafile */
Datafile df_def_per; /* default file-per-table datafile */
RemoteDatafile df_rem_gen; /* remote general datafile*/
RemoteDatafile df_rem_per; /* remote file-per-table datafile */
/* Look for the datafile in the default location. If it is
a general tablespace, it will be in the datadir. */
const char* filename = df.filepath();
const char* basename = base_name(filename);
df_def_gen.init(basename, 0);
df_def_gen.make_filepath(NULL, basename, IBD);
if (df_def_gen.open_read_only(false) == DB_SUCCESS
&& df_def_gen.validate_for_recovery() == DB_SUCCESS
&& df_def_gen.space_id() == space_id) {
df.set_filepath(df_def_gen.filepath());
df.open_read_only(false);
return(true);
}
/* If this datafile is file-per-table it will have a schema dir. */
ulint sep_found = 0;
const char* db = basename;
for (; db > filename && sep_found < 2; db--) {
if (db[0] == OS_PATH_SEPARATOR) {
sep_found++;
}
}
if (sep_found == 2) {
db += 2;
df_def_per.init(db, 0);
df_def_per.make_filepath(NULL, db, IBD);
if (df_def_per.open_read_only(false) == DB_SUCCESS
&& df_def_per.validate_for_recovery() == DB_SUCCESS
&& df_def_per.space_id() == space_id) {
df.set_filepath(df_def_per.filepath());
df.open_read_only(false);
return(true);
}
}
/* Did not find a general or file-per-table datafile in the
default location. Look for a remote general tablespace. */
df_rem_gen.set_name(basename);
if (df_rem_gen.open_link_file() == DB_SUCCESS) {
/* An ISL file was found with contents. */
if (df_rem_gen.open_read_only(false) != DB_SUCCESS
|| df_rem_gen.validate_for_recovery() != DB_SUCCESS) {
/* Assume that this ISL file is intended to be used.
Do not continue looking for another if this file
cannot be opened or is not a valid IBD file. */
ib::error() << "ISL file '"
<< df_rem_gen.link_filepath()
<< "' was found but the linked file '"
<< df_rem_gen.filepath()
<< "' could not be opened or is not correct.";
return(false);
}
/* Use this file if it has the space_id from the MLOG
record. */
if (df_rem_gen.space_id() == space_id) {
df.set_filepath(df_rem_gen.filepath());
df.open_read_only(false);
return(true);
}
/* Since old MLOG records can use the same basename in
multiple CREATE/DROP sequences, this ISL file could be
pointing to a later version of this basename.ibd file
which has a different space_id. Keep looking. */
}
/* Look for a remote file-per-table tablespace. */
if (sep_found == 2) {
df_rem_per.set_name(db);
if (df_rem_per.open_link_file() == DB_SUCCESS) {
/* An ISL file was found with contents. */
if (df_rem_per.open_read_only(false) != DB_SUCCESS
|| df_rem_per.validate_for_recovery()
!= DB_SUCCESS) {
/* Assume that this ISL file is intended to
be used. Do not continue looking for another
if this file cannot be opened or is not
a valid IBD file. */
ib::error() << "ISL file '"
<< df_rem_per.link_filepath()
<< "' was found but the linked file '"
<< df_rem_per.filepath()
<< "' could not be opened or is"
" not correct.";
return(false);
}
/* Use this file if it has the space_id from the
MLOG record. */
if (df_rem_per.space_id() == space_id) {
df.set_filepath(df_rem_per.filepath());
df.open_read_only(false);
return(true);
}
/* Since old MLOG records can use the same basename
in multiple CREATE/DROP TABLE sequences, this ISL
file could be pointing to a later version of this
basename.ibd file which has a different space_id.
Keep looking. */
}
}
/* No ISL files were found in the default location. Use the location
given in the redo log. */
if (df.open_read_only(false) == DB_SUCCESS
&& df.validate_for_recovery() == DB_SUCCESS
&& df.space_id() == space_id) {
return(true);
}
/* A datafile was not discovered for the filename given. */
return(false);
}
/** 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 log, so the data dictionary is not available and very little
validation is done. The tablespace name is extracred 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().
@param[in] space_id tablespace ID
@param[in] filename path/to/databasename/tablename.ibd
@param[out] space the tablespace, or NULL on error
@return status of the operation */
enum fil_load_status
fil_ibd_load(
ulint space_id,
const char* filename,
fil_space_t*& space)
{
/* If the a space is already in the file system cache with this
space ID, then there is nothing to do. */
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(space_id);
mutex_exit(&fil_system->mutex);
if (space != NULL) {
/* Compare the filename we are trying to open with the
filename from the first node of the tablespace we opened
previously. Fail if it is different. */
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
if (0 != strcmp(innobase_basename(filename),
innobase_basename(node->name))) {
ib::info()
<< "Ignoring data file '" << filename
<< "' with space ID " << space->id
<< ". Another data file called " << node->name
<< " exists with the same space ID.";
space = NULL;
return(FIL_LOAD_ID_CHANGED);
}
return(FIL_LOAD_OK);
}
/* If the filepath in the redo log is a default location in or
under the datadir, then just try to open it there. */
Datafile file;
file.set_filepath(filename);
Folder folder(filename, dirname_length(filename));
if (folder_mysql_datadir >= folder) {
file.open_read_only(false);
}
if (!file.is_open()) {
/* The file has been moved or it is a remote datafile. */
if (!fil_ibd_discover(space_id, file)
|| !file.is_open()) {
return(FIL_LOAD_NOT_FOUND);
}
}
os_offset_t size;
/* Read and validate the first page of the tablespace.
Assign a tablespace name based on the tablespace type. */
switch (file.validate_for_recovery()) {
os_offset_t minimum_size;
case DB_SUCCESS:
if (file.space_id() != space_id) {
ib::info()
<< "Ignoring data file '"
<< file.filepath()
<< "' with space ID " << file.space_id()
<< ", since the redo log references "
<< file.filepath() << " with space ID "
<< space_id << ".";
return(FIL_LOAD_ID_CHANGED);
}
/* Get and test the file size. */
size = os_file_get_size(file.handle());
/* Every .ibd file is created >= 4 pages in size.
Smaller files cannot be OK. */
minimum_size = FIL_IBD_FILE_INITIAL_SIZE * UNIV_PAGE_SIZE;
if (size == static_cast<os_offset_t>(-1)) {
/* The following call prints an error message */
os_file_get_last_error(true);
ib::error() << "Could not measure the size of"
" single-table tablespace file '"
<< file.filepath() << "'";
} else if (size < minimum_size) {
ib::error() << "The size of tablespace file '"
<< file.filepath() << "' is only " << size
<< ", should be at least " << minimum_size
<< "!";
} else {
/* Everything is fine so far. */
break;
}
/* Fall through to error handling */
case DB_TABLESPACE_EXISTS:
return(FIL_LOAD_INVALID);
default:
return(FIL_LOAD_NOT_FOUND);
}
ut_ad(space == NULL);
bool is_temp = FSP_FLAGS_GET_TEMPORARY(file.flags());
space = fil_space_create(
file.name(), space_id, file.flags(),
is_temp ? FIL_TYPE_TEMPORARY : FIL_TYPE_TABLESPACE,
file.get_crypt_info(), false);
if (space == NULL) {
return(FIL_LOAD_INVALID);
}
ut_ad(space->id == file.space_id());
ut_ad(space->id == space_id);
/* We do not use the size information we have about the file, because
the rounding formula for extents and pages is somewhat complex; we
let fil_node_open() do that task. */
if (!fil_node_create_low(file.filepath(), 0, space,
false, true, false)) {
ut_error;
}
#ifdef MYSQL_ENCRYPTION
/* For encryption tablespace, initial encryption information. */
if (FSP_FLAGS_GET_ENCRYPTION(space->flags)
&& file.m_encryption_key != NULL) {
dberr_t err = fil_set_encryption(space->id,
Encryption::AES,
file.m_encryption_key,
file.m_encryption_iv);
if (err != DB_SUCCESS) {
ib::error() << "Can't set encryption information for"
" tablespace " << space->name << "!";
}
}
#endif /* MYSQL_ENCRYPTION */
return(FIL_LOAD_OK);
}
/***********************************************************************//**
A fault-tolerant function that tries to read the next file name in the
directory. We retry 100 times if os_file_readdir_next_file() returns -1. The
idea is to read as much good data as we can and jump over bad data.
@return 0 if ok, -1 if error even after the retries, 1 if at the end
of the directory */
int
fil_file_readdir_next_file(
/*=======================*/
dberr_t* err, /*!< out: this is set to DB_ERROR if an error
was encountered, otherwise not changed */
const char* dirname,/*!< in: directory name or path */
os_file_dir_t dir, /*!< in: directory stream */
os_file_stat_t* info) /*!< in/out: buffer where the
info is returned */
{
for (ulint i = 0; i < 100; i++) {
int ret = os_file_readdir_next_file(dirname, dir, info);
if (ret != -1) {
return(ret);
}
ib::error() << "os_file_readdir_next_file() returned -1 in"
" directory " << dirname
<< ", crash recovery may have failed"
" for some .ibd files!";
*err = DB_ERROR;
}
return(-1);
}
/*******************************************************************//**
Report that a tablespace for a table was not found. */
static
void
fil_report_missing_tablespace(
/*===========================*/
const char* name, /*!< in: table name */
ulint space_id) /*!< in: table's space id */
{
ib::error() << "Table " << name
<< " in the InnoDB data dictionary has tablespace id "
<< space_id << ","
" but tablespace with that id or name does not exist. Have"
" you deleted or moved .ibd files? This may also be a table"
" created with CREATE TEMPORARY TABLE whose .ibd and .frm"
" files MySQL automatically removed, but the table still"
" exists in the InnoDB internal data dictionary.";
}
/** 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.
@param[in] id Tablespace ID
@param[in] name Tablespace name used in fil_space_create().
@param[in] print_error_if_does_not_exist
Print detailed error information to the
error log if a matching tablespace is not found from memory.
@param[in] adjust_space Whether to adjust space id on mismatch
@param[in] heap Heap memory
@param[in] table_id table id
@param[in] table table
@return true if a matching tablespace exists in the memory cache */
bool
fil_space_for_table_exists_in_mem(
ulint id,
const char* name,
bool print_error_if_does_not_exist,
bool adjust_space,
mem_heap_t* heap,
table_id_t table_id,
dict_table_t* table)
{
fil_space_t* fnamespace = NULL;
fil_space_t* space;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
/* Look if there is a space with the same id */
space = fil_space_get_by_id(id);
/* If tablespace contains encryption information
copy it also to table. */
if (space && space->crypt_data &&
table && !table->crypt_data) {
table->crypt_data = space->crypt_data;
}
if (space != NULL
&& FSP_FLAGS_GET_SHARED(space->flags)
&& adjust_space
&& srv_sys_tablespaces_open
&& 0 == strncmp(space->name, general_space_name,
strlen(general_space_name))) {
/* This name was assigned during recovery in fil_ibd_load().
This general tablespace was opened from an MLOG_FILE_NAME log
entry where the tablespace name does not exist. Replace the
temporary name with this name and return this space. */
HASH_DELETE(fil_space_t, name_hash, fil_system->name_hash,
ut_fold_string(space->name), space);
ut_free(space->name);
space->name = mem_strdup(name);
HASH_INSERT(fil_space_t, name_hash, fil_system->name_hash,
ut_fold_string(space->name), space);
mutex_exit(&fil_system->mutex);
return(true);
}
if (space != NULL) {
if (FSP_FLAGS_GET_SHARED(space->flags)
&& !srv_sys_tablespaces_open) {
/* No need to check the name */
mutex_exit(&fil_system->mutex);
return(true);
}
/* If this space has the expected name, use it. */
fnamespace = fil_space_get_by_name(name);
if (space == fnamespace) {
/* Found */
mutex_exit(&fil_system->mutex);
return(true);
}
}
/* Info from "fnamespace" comes from the ibd file itself, it can
be different from data obtained from System tables since file
operations are not transactional. If adjust_space is set, and the
mismatching space are between a user table and its temp table, we
shall adjust the ibd file name according to system table info */
if (adjust_space
&& space != NULL
&& row_is_mysql_tmp_table_name(space->name)
&& !row_is_mysql_tmp_table_name(name)) {
mutex_exit(&fil_system->mutex);
DBUG_EXECUTE_IF("ib_crash_before_adjust_fil_space",
DBUG_SUICIDE(););
if (fnamespace) {
const char* tmp_name;
tmp_name = dict_mem_create_temporary_tablename(
heap, name, table_id);
fil_rename_tablespace(
fnamespace->id,
UT_LIST_GET_FIRST(fnamespace->chain)->name,
tmp_name, NULL);
}
DBUG_EXECUTE_IF("ib_crash_after_adjust_one_fil_space",
DBUG_SUICIDE(););
fil_rename_tablespace(
id, UT_LIST_GET_FIRST(space->chain)->name,
name, NULL);
DBUG_EXECUTE_IF("ib_crash_after_adjust_fil_space",
DBUG_SUICIDE(););
mutex_enter(&fil_system->mutex);
fnamespace = fil_space_get_by_name(name);
ut_ad(space == fnamespace);
mutex_exit(&fil_system->mutex);
return(true);
}
if (!print_error_if_does_not_exist) {
mutex_exit(&fil_system->mutex);
return(false);
}
if (space == NULL) {
if (fnamespace == NULL) {
if (print_error_if_does_not_exist) {
fil_report_missing_tablespace(name, id);
}
} else {
ib::error() << "Table " << name << " in InnoDB data"
" dictionary has tablespace id " << id
<< ", but a tablespace with that id does not"
" exist. There is a tablespace of name "
<< fnamespace->name << " and id "
<< fnamespace->id << ", though. Have you"
" deleted or moved .ibd files?";
}
error_exit:
ib::warn() << TROUBLESHOOT_DATADICT_MSG;
mutex_exit(&fil_system->mutex);
return(false);
}
if (0 != strcmp(space->name, name)) {
ib::error() << "Table " << name << " in InnoDB data dictionary"
" has tablespace id " << id << ", but the tablespace"
" with that id has name " << space->name << "."
" Have you deleted or moved .ibd files?";
if (fnamespace != NULL) {
ib::error() << "There is a tablespace with the right"
" name: " << fnamespace->name << ", but its id"
" is " << fnamespace->id << ".";
}
goto error_exit;
}
mutex_exit(&fil_system->mutex);
return(false);
}
/** Return the space ID based on the tablespace name.
The tablespace must be found in the tablespace memory cache.
This call is made from external to this module, so the mutex is not owned.
@param[in] tablespace Tablespace name
@return space ID if tablespace found, ULINT_UNDEFINED if space not. */
ulint
fil_space_get_id_by_name(
const char* tablespace)
{
mutex_enter(&fil_system->mutex);
/* Search for a space with the same name. */
fil_space_t* space = fil_space_get_by_name(tablespace);
ulint id = (space == NULL) ? ULINT_UNDEFINED : space->id;
mutex_exit(&fil_system->mutex);
return(id);
}
/*========== RESERVE FREE EXTENTS (for a B-tree split, for example) ===*/
/*******************************************************************//**
Tries to reserve free extents in a file space.
@return true if succeed */
bool
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 */
{
fil_space_t* space;
bool success;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space);
if (space->n_reserved_extents + n_to_reserve > n_free_now) {
success = false;
} else {
space->n_reserved_extents += n_to_reserve;
success = true;
}
mutex_exit(&fil_system->mutex);
return(success);
}
/*******************************************************************//**
Releases free extents in a file space. */
void
fil_space_release_free_extents(
/*===========================*/
ulint id, /*!< in: space id */
ulint n_reserved) /*!< in: how many one reserved */
{
fil_space_t* space;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space);
ut_a(space->n_reserved_extents >= n_reserved);
space->n_reserved_extents -= n_reserved;
mutex_exit(&fil_system->mutex);
}
/*******************************************************************//**
Gets the number of reserved extents. If the database is silent, this number
should be zero. */
ulint
fil_space_get_n_reserved_extents(
/*=============================*/
ulint id) /*!< in: space id */
{
fil_space_t* space;
ulint n;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
ut_a(space);
n = space->n_reserved_extents;
mutex_exit(&fil_system->mutex);
return(n);
}
/*============================ FILE I/O ================================*/
/********************************************************************//**
NOTE: you must call fil_mutex_enter_and_prepare_for_io() first!
Prepares a file node for i/o. Opens the file if it is closed. Updates the
pending i/o's field in the node and the system appropriately. Takes the node
off the LRU list if it is in the LRU list. The caller must hold the fil_sys
mutex.
@return false if the file can't be opened, otherwise true */
static
bool
fil_node_prepare_for_io(
/*====================*/
fil_node_t* node, /*!< in: file node */
fil_system_t* system, /*!< in: tablespace memory cache */
fil_space_t* space) /*!< in: space */
{
ut_ad(node && system && space);
ut_ad(mutex_own(&(system->mutex)));
if (system->n_open > system->max_n_open + 5) {
ib::warn() << "Open files " << system->n_open
<< " exceeds the limit " << system->max_n_open;
}
if (!node->is_open) {
/* File is closed: open it */
ut_a(node->n_pending == 0);
if (!fil_node_open_file(node)) {
return(false);
}
}
if (node->n_pending == 0 && fil_space_belongs_in_lru(space)) {
/* The node is in the LRU list, remove it */
ut_a(UT_LIST_GET_LEN(system->LRU) > 0);
UT_LIST_REMOVE(system->LRU, node);
}
node->n_pending++;
return(true);
}
/********************************************************************//**
Updates the data structures when an i/o operation finishes. Updates the
pending i/o's field in the node appropriately. */
static
void
fil_node_complete_io(
/*=================*/
fil_node_t* node, /*!< in: file node */
fil_system_t* system, /*!< in: tablespace memory cache */
const IORequest&type) /*!< in: IO_TYPE_*, marks the node as
modified if TYPE_IS_WRITE() */
{
ut_ad(mutex_own(&system->mutex));
ut_a(node->n_pending > 0);
--node->n_pending;
ut_ad(type.validate());
if (type.is_write()) {
ut_ad(!srv_read_only_mode
|| fsp_is_system_temporary(node->space->id));
++system->modification_counter;
node->modification_counter = system->modification_counter;
if (fil_buffering_disabled(node->space)) {
/* We don't need to keep track of unflushed
changes as user has explicitly disabled
buffering. */
ut_ad(!node->space->is_in_unflushed_spaces);
node->flush_counter = node->modification_counter;
} else if (!node->space->is_in_unflushed_spaces) {
node->space->is_in_unflushed_spaces = true;
UT_LIST_ADD_FIRST(
system->unflushed_spaces, node->space);
}
}
if (node->n_pending == 0 && fil_space_belongs_in_lru(node->space)) {
/* The node must be put back to the LRU list */
UT_LIST_ADD_FIRST(system->LRU, node);
}
}
/** Report information about an invalid page access. */
static
void
fil_report_invalid_page_access(
ulint block_offset, /*!< in: block offset */
ulint space_id, /*!< in: space id */
const char* space_name, /*!< in: space name */
ulint byte_offset, /*!< in: byte offset */
ulint len, /*!< in: I/O length */
bool is_read) /*!< in: I/O type */
{
ib::error()
<< "Trying to access page number " << block_offset << " in"
" space " << space_id << ", space name " << space_name << ","
" which is outside the tablespace bounds. Byte offset "
<< byte_offset << ", len " << len << ", i/o type " <<
(is_read ? "read" : "write")
<< ". If you get this error at mysqld startup, please check"
" that your my.cnf matches the ibdata files that you have in"
" the MySQL server.";
ib::error() << "Server exits"
#ifdef UNIV_DEBUG
<< " at " << __FILE__ << "[" << __LINE__ << "]"
#endif
<< ".";
_exit(1);
}
#ifdef MYSQL_ENCRYPTION
/** Set encryption information for IORequest.
@param[in,out] req_type IO request
@param[in] page_id page id
@param[in] space table space */
inline
void
fil_io_set_encryption(
IORequest& req_type,
const page_id_t& page_id,
fil_space_t* space)
{
/* Don't encrypt the log, page 0 of all tablespaces, all pages
from the system tablespace. */
if (!req_type.is_log() && page_id.page_no() > 0
&& space->encryption_type != Encryption::NONE)
{
req_type.encryption_key(space->encryption_key,
space->encryption_klen,
space->encryption_iv);
req_type.encryption_algorithm(Encryption::AES);
} else {
req_type.clear_encrypted();
}
}
#endif /* MYSQL_ENCRYPTION */
/** Reads or writes data. This operation could be asynchronous (aio).
@param[in,out] type IO context
@param[in] sync true if synchronous aio is desired
@param[in] page_id page id
@param[in] page_size page size
@param[in] byte_offset remainder of offset in bytes; in aio this
must be divisible by the OS block size
@param[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
@param[in,out] buf buffer where to store read data or from where
to write; in aio this must be appropriately
aligned
@param[in] message message for aio handler if non-sync aio
used, else ignored
@param[in] write_size actual payload size when written
to avoid extra punch holes in compression
@return DB_SUCCESS, DB_TABLESPACE_DELETED or DB_TABLESPACE_TRUNCATED
if we are trying to do i/o on a tablespace which does not exist */
dberr_t
fil_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,
ulint* write_size)
{
os_offset_t offset;
IORequest req_type(type);
ut_ad(req_type.validate());
ut_ad(len > 0);
ut_ad(byte_offset < UNIV_PAGE_SIZE);
ut_ad(!page_size.is_compressed() || byte_offset == 0);
ut_ad(UNIV_PAGE_SIZE == (ulong)(1 << UNIV_PAGE_SIZE_SHIFT));
#if (1 << UNIV_PAGE_SIZE_SHIFT_MAX) != UNIV_PAGE_SIZE_MAX
# error "(1 << UNIV_PAGE_SIZE_SHIFT_MAX) != UNIV_PAGE_SIZE_MAX"
#endif
#if (1 << UNIV_PAGE_SIZE_SHIFT_MIN) != UNIV_PAGE_SIZE_MIN
# error "(1 << UNIV_PAGE_SIZE_SHIFT_MIN) != UNIV_PAGE_SIZE_MIN"
#endif
ut_ad(fil_validate_skip());
/* ibuf bitmap pages must be read in the sync AIO mode: */
ut_ad(recv_no_ibuf_operations
|| req_type.is_write()
|| !ibuf_bitmap_page(page_id, page_size)
|| sync
|| req_type.is_log());
ulint mode;
if (sync) {
mode = OS_AIO_SYNC;
} else if (req_type.is_log()) {
mode = OS_AIO_LOG;
} else if (req_type.is_read()
&& !recv_no_ibuf_operations
&& ibuf_page(page_id, page_size, NULL)) {
mode = OS_AIO_IBUF;
/* Reduce probability of deadlock bugs in connection with ibuf:
do not let the ibuf i/o handler sleep */
req_type.clear_do_not_wake();
} else {
mode = OS_AIO_NORMAL;
}
if (req_type.is_read()) {
srv_stats.data_read.add(len);
} else if (req_type.is_write()) {
ut_ad(!srv_read_only_mode
|| fsp_is_system_temporary(page_id.space()));
srv_stats.data_written.add(len);
}
/* Reserve the fil_system mutex and make sure that we can open at
least one file while holding it, if the file is not already open */
fil_mutex_enter_and_prepare_for_io(page_id.space());
fil_space_t* space = fil_space_get_by_id(page_id.space());
/* If we are deleting a tablespace we don't allow async read operations
on that. However, we do allow write operations and sync read operations. */
if (space == NULL
|| (req_type.is_read()
&& !sync
&& space->stop_new_ops
&& !space->is_being_truncated)) {
mutex_exit(&fil_system->mutex);
if (!req_type.ignore_missing()) {
ib::error()
<< "Trying to do I/O to a tablespace which"
" does not exist. I/O type: "
<< (req_type.is_read() ? "read" : "write")
<< ", page: " << page_id
<< ", I/O length: " << len << " bytes";
}
return(DB_TABLESPACE_DELETED);
}
ut_ad(mode != OS_AIO_IBUF || fil_type_is_data(space->purpose));
ulint cur_page_no = page_id.page_no();
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
for (;;) {
if (node == NULL) {
if (req_type.ignore_missing()) {
mutex_exit(&fil_system->mutex);
return(DB_ERROR);
}
fil_report_invalid_page_access(
page_id.page_no(), page_id.space(),
space->name, byte_offset, len,
req_type.is_read());
} else if (fil_is_user_tablespace_id(space->id)
&& node->size == 0) {
/* We do not know the size of a single-table tablespace
before we open the file */
break;
} else if (node->size > cur_page_no) {
/* Found! */
break;
} else {
if (space->id != srv_sys_space.space_id()
&& UT_LIST_GET_LEN(space->chain) == 1
&& (srv_is_tablespace_truncated(space->id)
|| space->is_being_truncated
|| srv_was_tablespace_truncated(space))
&& req_type.is_read()) {
/* Handle page which is outside the truncated
tablespace bounds when recovering from a crash
happened during a truncation */
mutex_exit(&fil_system->mutex);
return(DB_TABLESPACE_TRUNCATED);
}
cur_page_no -= node->size;
node = UT_LIST_GET_NEXT(chain, node);
}
}
/* Open file if closed */
if (!fil_node_prepare_for_io(node, fil_system, space)) {
if (fil_type_is_data(space->purpose)
&& fil_is_user_tablespace_id(space->id)) {
mutex_exit(&fil_system->mutex);
if (!req_type.ignore_missing()) {
ib::error()
<< "Trying to do I/O to a tablespace"
" which exists without .ibd data file."
" I/O type: "
<< (req_type.is_read()
? "read" : "write")
<< ", page: "
<< page_id_t(page_id.space(),
cur_page_no)
<< ", I/O length: " << len << " bytes";
}
return(DB_TABLESPACE_DELETED);
}
/* The tablespace is for log. Currently, we just assert here
to prevent handling errors along the way fil_io returns.
Also, if the log files are missing, it would be hard to
promise the server can continue running. */
ut_a(0);
}
/* Check that at least the start offset is within the bounds of a
single-table tablespace, including rollback tablespaces. */
if (node->size <= cur_page_no
&& space->id != srv_sys_space.space_id()
&& fil_type_is_data(space->purpose)) {
if (req_type.ignore_missing()) {
/* If we can tolerate the non-existent pages, we
should return with DB_ERROR and let caller decide
what to do. */
fil_node_complete_io(node, fil_system, req_type);
mutex_exit(&fil_system->mutex);
return(DB_ERROR);
}
fil_report_invalid_page_access(
page_id.page_no(), page_id.space(),
space->name, byte_offset, len, req_type.is_read());
}
/* Now we have made the changes in the data structures of fil_system */
mutex_exit(&fil_system->mutex);
/* Calculate the low 32 bits and the high 32 bits of the file offset */
if (!page_size.is_compressed()) {
offset = ((os_offset_t) cur_page_no
<< UNIV_PAGE_SIZE_SHIFT) + byte_offset;
ut_a(node->size - cur_page_no
>= ((byte_offset + len + (UNIV_PAGE_SIZE - 1))
/ UNIV_PAGE_SIZE));
} else {
ulint size_shift;
switch (page_size.physical()) {
case 1024: size_shift = 10; break;
case 2048: size_shift = 11; break;
case 4096: size_shift = 12; break;
case 8192: size_shift = 13; break;
case 16384: size_shift = 14; break;
case 32768: size_shift = 15; break;
case 65536: size_shift = 16; break;
default: ut_error;
}
offset = ((os_offset_t) cur_page_no << size_shift)
+ byte_offset;
ut_a(node->size - cur_page_no
>= (len + (page_size.physical() - 1))
/ page_size.physical());
}
/* Do AIO */
ut_a(byte_offset % OS_FILE_LOG_BLOCK_SIZE == 0);
ut_a((len % OS_FILE_LOG_BLOCK_SIZE) == 0);
const char* name = node->name == NULL ? space->name : node->name;
#ifdef MYSQL_COMPRESSION
/* Don't compress the log, page 0 of all tablespaces, tables
compresssed with the old scheme and all pages from the system
tablespace. */
if (req_type.is_write()
&& !req_type.is_log()
&& !page_size.is_compressed()
&& page_id.page_no() > 0
&& IORequest::is_punch_hole_supported()
&& node->punch_hole) {
ut_ad(!req_type.is_log());
req_type.set_punch_hole();
req_type.compression_algorithm(space->compression_type);
} else {
req_type.clear_compressed();
}
#endif /* MYSQL_COMPRESSION */
#ifdef MYSQL_ENCRYPTION
/* Set encryption information. */
fil_io_set_encryption(req_type, page_id, space);
#endif /* MYSQL_ENCRYPTION */
req_type.block_size(node->block_size);
/* Queue the aio request */
dberr_t err = os_aio(
req_type,
mode, name, node->handle, buf, offset, len,
space->purpose != FIL_TYPE_TEMPORARY
&& srv_read_only_mode,
node, message, write_size);
if (err == DB_IO_NO_PUNCH_HOLE) {
err = DB_SUCCESS;
if (node->punch_hole) {
ib::warn()
<< "Punch hole failed for '"
<< name << "'";
}
fil_no_punch_hole(node);
}
/* We an try to recover the page from the double write buffer if
the decompression fails or the page is corrupt. */
ut_a(req_type.is_dblwr_recover() || err == DB_SUCCESS);
if (sync) {
/* The i/o operation is already completed when we return from
os_aio: */
mutex_enter(&fil_system->mutex);
fil_node_complete_io(node, fil_system, req_type);
mutex_exit(&fil_system->mutex);
ut_ad(fil_validate_skip());
}
return(err);
}
/**********************************************************************//**
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.cc for more info). The thread specifies which
segment it wants to wait for. */
void
fil_aio_wait(
/*=========*/
ulint segment) /*!< in: the number of the segment in the aio
array to wait for */
{
fil_node_t* node;
IORequest type;
void* message;
ut_ad(fil_validate_skip());
dberr_t err = os_aio_handler(segment, &node, &message, &type);
ut_a(err == DB_SUCCESS);
if (node == NULL) {
ut_ad(srv_shutdown_state == SRV_SHUTDOWN_EXIT_THREADS);
return;
}
srv_set_io_thread_op_info(segment, "complete io for fil node");
mutex_enter(&fil_system->mutex);
fil_node_complete_io(node, fil_system, type);
mutex_exit(&fil_system->mutex);
ut_ad(fil_validate_skip());
/* Do the i/o handling */
/* IMPORTANT: since i/o handling for reads will read also the insert
buffer in tablespace 0, you have to be very careful not to introduce
deadlocks in the i/o system. We keep tablespace 0 data files always
open, and use a special i/o thread to serve insert buffer requests. */
switch (node->space->purpose) {
case FIL_TYPE_TABLESPACE:
case FIL_TYPE_TEMPORARY:
case FIL_TYPE_IMPORT:
srv_set_io_thread_op_info(segment, "complete io for buf page");
/* async single page writes from the dblwr buffer don't have
access to the page */
if (message != NULL) {
buf_page_io_complete(static_cast<buf_page_t*>(message));
}
return;
case FIL_TYPE_LOG:
srv_set_io_thread_op_info(segment, "complete io for log");
log_io_complete(static_cast<log_group_t*>(message));
return;
}
ut_ad(0);
}
/**********************************************************************//**
Flushes to disk possible writes cached by the OS. If the space does not exist
or is being dropped, does not do anything. */
void
fil_flush(
/*======*/
ulint space_id) /*!< in: file space id (this can be a group of
log files or a tablespace of the database) */
{
mutex_enter(&fil_system->mutex);
if (fil_space_t* space = fil_space_get_by_id(space_id)) {
if (space->purpose != FIL_TYPE_TEMPORARY
&& !space->stop_new_ops
&& !space->is_being_truncated) {
fil_flush_low(space);
}
}
mutex_exit(&fil_system->mutex);
}
/** Flush to disk the writes in file spaces of the given type
possibly cached by the OS.
@param[in] purpose FIL_TYPE_TABLESPACE or FIL_TYPE_LOG */
void
fil_flush_file_spaces(
fil_type_t purpose)
{
fil_space_t* space;
ulint* space_ids;
ulint n_space_ids;
ut_ad(purpose == FIL_TYPE_TABLESPACE || purpose == FIL_TYPE_LOG);
mutex_enter(&fil_system->mutex);
n_space_ids = UT_LIST_GET_LEN(fil_system->unflushed_spaces);
if (n_space_ids == 0) {
mutex_exit(&fil_system->mutex);
return;
}
/* Assemble a list of space ids to flush. Previously, we
traversed fil_system->unflushed_spaces and called UT_LIST_GET_NEXT()
on a space that was just removed from the list by fil_flush().
Thus, the space could be dropped and the memory overwritten. */
space_ids = static_cast<ulint*>(
ut_malloc_nokey(n_space_ids * sizeof(*space_ids)));
n_space_ids = 0;
for (space = UT_LIST_GET_FIRST(fil_system->unflushed_spaces);
space;
space = UT_LIST_GET_NEXT(unflushed_spaces, space)) {
if (space->purpose == purpose
&& !space->stop_new_ops
&& !space->is_being_truncated) {
space_ids[n_space_ids++] = space->id;
}
}
mutex_exit(&fil_system->mutex);
/* Flush the spaces. It will not hurt to call fil_flush() on
a non-existing space id. */
for (ulint i = 0; i < n_space_ids; i++) {
fil_flush(space_ids[i]);
}
ut_free(space_ids);
}
/** Functor to validate the file node list of a tablespace. */
struct Check {
/** Total size of file nodes visited so far */
ulint size;
/** Total number of open files visited so far */
ulint n_open;
/** Constructor */
Check() : size(0), n_open(0) {}
/** Visit a file node
@param[in] elem file node to visit */
void operator()(const fil_node_t* elem)
{
ut_a(elem->is_open || !elem->n_pending);
n_open += elem->is_open;
size += elem->size;
}
/** Validate a tablespace.
@param[in] space tablespace to validate
@return number of open file nodes */
static ulint validate(const fil_space_t* space)
{
ut_ad(mutex_own(&fil_system->mutex));
Check check;
ut_list_validate(space->chain, check);
ut_a(space->size == check.size);
return(check.n_open);
}
};
/******************************************************************//**
Checks the consistency of the tablespace cache.
@return true if ok */
bool
fil_validate(void)
/*==============*/
{
fil_space_t* space;
fil_node_t* fil_node;
ulint n_open = 0;
mutex_enter(&fil_system->mutex);
/* Look for spaces in the hash table */
for (ulint i = 0; i < hash_get_n_cells(fil_system->spaces); i++) {
for (space = static_cast<fil_space_t*>(
HASH_GET_FIRST(fil_system->spaces, i));
space != 0;
space = static_cast<fil_space_t*>(
HASH_GET_NEXT(hash, space))) {
n_open += Check::validate(space);
}
}
ut_a(fil_system->n_open == n_open);
UT_LIST_CHECK(fil_system->LRU);
for (fil_node = UT_LIST_GET_FIRST(fil_system->LRU);
fil_node != 0;
fil_node = UT_LIST_GET_NEXT(LRU, fil_node)) {
ut_a(fil_node->n_pending == 0);
ut_a(!fil_node->being_extended);
ut_a(fil_node->is_open);
ut_a(fil_space_belongs_in_lru(fil_node->space));
}
mutex_exit(&fil_system->mutex);
return(true);
}
/********************************************************************//**
Returns true if file address is undefined.
@return true if undefined */
bool
fil_addr_is_null(
/*=============*/
fil_addr_t addr) /*!< in: address */
{
return(addr.page == FIL_NULL);
}
/********************************************************************//**
Get the predecessor of a file page.
@return FIL_PAGE_PREV */
ulint
fil_page_get_prev(
/*==============*/
const byte* page) /*!< in: file page */
{
return(mach_read_from_4(page + FIL_PAGE_PREV));
}
/********************************************************************//**
Get the successor of a file page.
@return FIL_PAGE_NEXT */
ulint
fil_page_get_next(
/*==============*/
const byte* page) /*!< in: file page */
{
return(mach_read_from_4(page + FIL_PAGE_NEXT));
}
/*********************************************************************//**
Sets the file page type. */
void
fil_page_set_type(
/*==============*/
byte* page, /*!< in/out: file page */
ulint type) /*!< in: type */
{
ut_ad(page);
mach_write_to_2(page + FIL_PAGE_TYPE, type);
}
/** Reset the page type.
Data files created before MySQL 5.1 may contain garbage in FIL_PAGE_TYPE.
In MySQL 3.23.53, only undo log pages and index pages were tagged.
Any other pages were written with uninitialized bytes in FIL_PAGE_TYPE.
@param[in] page_id page number
@param[in,out] page page with invalid FIL_PAGE_TYPE
@param[in] type expected page type
@param[in,out] mtr mini-transaction */
void
fil_page_reset_type(
const page_id_t& page_id,
byte* page,
ulint type,
mtr_t* mtr)
{
ib::info()
<< "Resetting invalid page " << page_id << " type "
<< fil_page_get_type(page) << " to " << type << ".";
mlog_write_ulint(page + FIL_PAGE_TYPE, type, MLOG_2BYTES, mtr);
}
/****************************************************************//**
Closes the tablespace memory cache. */
void
fil_close(void)
/*===========*/
{
if (fil_system) {
hash_table_free(fil_system->spaces);
hash_table_free(fil_system->name_hash);
ut_a(UT_LIST_GET_LEN(fil_system->LRU) == 0);
ut_a(UT_LIST_GET_LEN(fil_system->unflushed_spaces) == 0);
ut_a(UT_LIST_GET_LEN(fil_system->space_list) == 0);
mutex_free(&fil_system->mutex);
ut_free(fil_system);
fil_system = NULL;
fil_space_crypt_cleanup();
}
}
/********************************************************************//**
Initializes a buffer control block when the buf_pool is created. */
static
void
fil_buf_block_init(
/*===============*/
buf_block_t* block, /*!< in: pointer to control block */
byte* frame) /*!< in: pointer to buffer frame */
{
UNIV_MEM_DESC(frame, UNIV_PAGE_SIZE);
block->frame = frame;
block->page.io_fix = BUF_IO_NONE;
/* There are assertions that check for this. */
block->page.buf_fix_count = 1;
block->page.state = BUF_BLOCK_READY_FOR_USE;
page_zip_des_init(&block->page.zip);
}
struct fil_iterator_t {
os_file_t file; /*!< File handle */
const char* filepath; /*!< File path name */
os_offset_t start; /*!< From where to start */
os_offset_t end; /*!< Where to stop */
os_offset_t file_size; /*!< File size in bytes */
ulint page_size; /*!< Page size */
ulint n_io_buffers; /*!< Number of pages to use
for IO */
byte* io_buffer; /*!< Buffer to use for IO */
fil_space_crypt_t *crypt_data; /*!< MariaDB Crypt data (if encrypted) */
byte* crypt_io_buffer; /*!< MariaDB IO buffer when encrypted */
byte* encryption_key; /*!< Encryption key */
byte* encryption_iv; /*!< Encryption iv */
};
/********************************************************************//**
TODO: This can be made parallel trivially by chunking up the file and creating
a callback per thread. Main benefit will be to use multiple CPUs for
checksums and compressed tables. We have to do compressed tables block by
block right now. Secondly we need to decompress/compress and copy too much
of data. These are CPU intensive.
Iterate over all the pages in the tablespace.
@param iter Tablespace iterator
@param block block to use for IO
@param callback Callback to inspect and update page contents
@retval DB_SUCCESS or error code */
static
dberr_t
fil_iterate(
/*========*/
const fil_iterator_t& iter,
buf_block_t* block,
PageCallback& callback)
{
os_offset_t offset;
ulint page_no = 0;
ulint space_id = callback.get_space_id();
ulint n_bytes = iter.n_io_buffers * iter.page_size;
ut_ad(!srv_read_only_mode);
/* For old style compressed tables we do a lot of useless copying
for non-index pages. Unfortunately, it is required by
buf_zip_decompress() */
ulint read_type = IORequest::READ;
ulint write_type = IORequest::WRITE;
for (offset = iter.start; offset < iter.end; offset += n_bytes) {
byte* io_buffer = iter.io_buffer;
const bool row_compressed
= callback.get_page_size().is_compressed();
block->frame = io_buffer;
if (row_compressed) {
page_zip_des_init(&block->page.zip);
page_zip_set_size(&block->page.zip, iter.page_size);
block->page.size.copy_from(
page_size_t(iter.page_size,
univ_page_size.logical(),
true));
block->page.zip.data = block->frame + UNIV_PAGE_SIZE;
ut_d(block->page.zip.m_external = true);
ut_ad(iter.page_size
== callback.get_page_size().physical());
/* Zip IO is done in the compressed page buffer. */
io_buffer = block->page.zip.data;
} else {
io_buffer = iter.io_buffer;
}
/* We have to read the exact number of bytes. Otherwise the
InnoDB IO functions croak on failed reads. */
n_bytes = static_cast<ulint>(
ut_min(static_cast<os_offset_t>(n_bytes),
iter.end - offset));
ut_ad(n_bytes > 0);
ut_ad(!(n_bytes % iter.page_size));
dberr_t err = DB_SUCCESS;
IORequest read_request(read_type);
#ifdef MYSQL_ENCRYPTION
/* For encrypted table, set encryption information. */
if (iter.encryption_key != NULL && offset != 0) {
read_request.encryption_key(iter.encryption_key,
ENCRYPTION_KEY_LEN,
iter.encryption_iv);
read_request.encryption_algorithm(Encryption::AES);
}
#endif /* MYSQL_ENCRYPTION */
byte* readptr = io_buffer;
byte* writeptr = io_buffer;
bool encrypted = false;
/* Use additional crypt io buffer if tablespace is encrypted */
if (iter.crypt_data != NULL && iter.crypt_data->should_encrypt()) {
encrypted = true;
readptr = iter.crypt_io_buffer;
writeptr = iter.crypt_io_buffer;
}
err = os_file_read(
read_request, iter.file, readptr, offset,
(ulint) n_bytes);
if (err != DB_SUCCESS) {
ib::error() << "os_file_read() failed";
return(err);
}
bool updated = false;
os_offset_t page_off = offset;
ulint n_pages_read = (ulint) n_bytes / iter.page_size;
bool decrypted = false;
for (ulint i = 0; i < n_pages_read; ++i) {
ulint size = iter.page_size;
dberr_t err = DB_SUCCESS;
byte* src = readptr + (i * size);
byte* dst = io_buffer + (i * size);
bool frame_changed = false;
ulint page_type = mach_read_from_2(src+FIL_PAGE_TYPE);
bool page_compressed =
(page_type == FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED
|| page_type == FIL_PAGE_PAGE_COMPRESSED);
/* If tablespace is encrypted, we need to decrypt
the page. */
if (encrypted) {
decrypted = fil_space_decrypt(
iter.crypt_data,
dst, //dst
callback.get_page_size(),
src, // src
&err); // src
if (err != DB_SUCCESS) {
return(err);
}
if (decrypted) {
updated = true;
} else if (!page_compressed
&& !row_compressed) {
block->frame = src;
frame_changed = true;
} else {
memcpy(dst, src, size);
}
}
/* If the original page is page_compressed, we need
to decompress page before we can update it. */
if (page_compressed) {
fil_decompress_page(NULL, dst, size, NULL);
updated = true;
}
buf_block_set_file_page(
block, page_id_t(space_id, page_no++));
if ((err = callback(page_off, block)) != DB_SUCCESS) {
return(err);
} else if (!updated) {
updated = buf_block_get_state(block)
== BUF_BLOCK_FILE_PAGE;
}
buf_block_set_state(block, BUF_BLOCK_NOT_USED);
buf_block_set_state(block, BUF_BLOCK_READY_FOR_USE);
/* If tablespace is encrypted we use additional
temporary scratch area where pages are read
for decrypting readptr == crypt_io_buffer != io_buffer.
Destination for decryption is a buffer pool block
block->frame == dst == io_buffer that is updated.
Pages that did not require decryption even when
tablespace is marked as encrypted are not copied
instead block->frame is set to src == readptr.
For encryption we again use temporary scratch area
writeptr != io_buffer == dst
that is then written to the tablespace
(1) For normal tables io_buffer == dst == writeptr
(2) For only page compressed tables
io_buffer == dst == writeptr
(3) For encrypted (and page compressed)
readptr != io_buffer == dst != writeptr
*/
ut_ad(!encrypted && !page_compressed ?
src == dst && dst == writeptr + (i * size):1);
ut_ad(page_compressed && !encrypted ?
src == dst && dst == writeptr + (i * size):1);
ut_ad(encrypted ?
src != dst && dst != writeptr + (i * size):1);
if (encrypted) {
memcpy(writeptr + (i * size),
row_compressed ? block->page.zip.data :
block->frame, size);
}
if (frame_changed) {
block->frame = dst;
}
src = io_buffer + (i * size);
if (page_compressed) {
ulint len = 0;
fil_compress_page(space_id,
src,
NULL,
size,
fil_space_get_page_compression_level(space_id),
fil_space_get_block_size(space_id, offset, size),
encrypted,
&len,
NULL);
updated = true;
}
/* If tablespace is encrypted, encrypt page before we
write it back. Note that we should not encrypt the
buffer that is in buffer pool. */
if (decrypted && encrypted) {
byte *dest = writeptr + (i * size);
ulint space = mach_read_from_4(
src + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID);
ulint offset = mach_read_from_4(src + FIL_PAGE_OFFSET);
ib_uint64_t lsn = mach_read_from_8(src + FIL_PAGE_LSN);
byte* tmp = fil_encrypt_buf(
iter.crypt_data,
space,
offset,
lsn,
src,
callback.get_page_size(),
dest);
if (tmp == src) {
/* TODO: remove unnecessary memcpy's */
memcpy(dest, src, iter.page_size);
}
updated = true;
}
page_off += iter.page_size;
block->frame += iter.page_size;
}
IORequest write_request(write_type);
#ifdef MYSQL_ENCRYPTION
/* For encrypted table, set encryption information. */
if (iter.encryption_key != NULL && offset != 0) {
write_request.encryption_key(iter.encryption_key,
ENCRYPTION_KEY_LEN,
iter.encryption_iv);
write_request.encryption_algorithm(Encryption::AES);
}
#endif /* MYSQL_ENCRYPTION */
/* A page was updated in the set, write back to disk.
Note: We don't have the compression algorithm, we write
out the imported file as uncompressed. */
if (updated
&& (err = os_file_write(
write_request,
iter.filepath, iter.file, writeptr,
offset, (ulint) n_bytes)) != DB_SUCCESS) {
/* This is not a hard error */
if (err == DB_IO_NO_PUNCH_HOLE) {
err = DB_SUCCESS;
write_type &= ~IORequest::PUNCH_HOLE;
} else {
ib::error() << "os_file_write() failed";
return(err);
}
}
}
return(DB_SUCCESS);
}
/********************************************************************//**
Iterate over all the pages in the tablespace.
@param table the table definiton in the server
@param n_io_buffers number of blocks to read and write together
@param callback functor that will do the page updates
@return DB_SUCCESS or error code */
dberr_t
fil_tablespace_iterate(
/*===================*/
dict_table_t* table,
ulint n_io_buffers,
PageCallback& callback)
{
dberr_t err;
os_file_t file;
char* filepath;
bool success;
ut_a(n_io_buffers > 0);
ut_ad(!srv_read_only_mode);
DBUG_EXECUTE_IF("ib_import_trigger_corruption_1",
return(DB_CORRUPTION););
/* Make sure the data_dir_path is set. */
dict_get_and_save_data_dir_path(table, false);
if (DICT_TF_HAS_DATA_DIR(table->flags)) {
ut_a(table->data_dir_path);
filepath = fil_make_filepath(
table->data_dir_path, table->name.m_name, IBD, true);
} else {
filepath = fil_make_filepath(
NULL, table->name.m_name, IBD, false);
}
if (filepath == NULL) {
return(DB_OUT_OF_MEMORY);
}
file = os_file_create_simple_no_error_handling(
innodb_data_file_key, filepath,
OS_FILE_OPEN, OS_FILE_READ_WRITE, srv_read_only_mode, &success);
DBUG_EXECUTE_IF("fil_tablespace_iterate_failure",
{
static bool once;
if (!once || ut_rnd_interval(0, 10) == 5) {
once = true;
success = false;
os_file_close(file);
}
});
if (!success) {
/* The following call prints an error message */
os_file_get_last_error(true);
ib::error() << "Trying to import a tablespace, but could not"
" open the tablespace file " << filepath;
ut_free(filepath);
return(DB_TABLESPACE_NOT_FOUND);
} else {
err = DB_SUCCESS;
}
callback.set_file(filepath, file);
os_offset_t file_size = os_file_get_size(file);
ut_a(file_size != (os_offset_t) -1);
/* The block we will use for every physical page */
buf_block_t* block;
block = reinterpret_cast<buf_block_t*>(ut_zalloc_nokey(sizeof(*block)));
mutex_create(LATCH_ID_BUF_BLOCK_MUTEX, &block->mutex);
/* Allocate a page to read in the tablespace header, so that we
can determine the page size and zip size (if it is compressed).
We allocate an extra page in case it is a compressed table. One
page is to ensure alignement. */
void* page_ptr = ut_malloc_nokey(3 * UNIV_PAGE_SIZE);
byte* page = static_cast<byte*>(ut_align(page_ptr, UNIV_PAGE_SIZE));
fil_buf_block_init(block, page);
/* Read the first page and determine the page and zip size. */
IORequest request(IORequest::READ);
err = os_file_read(request, file, page, 0, UNIV_PAGE_SIZE);
if (err != DB_SUCCESS) {
err = DB_IO_ERROR;
} else if ((err = callback.init(file_size, block)) == DB_SUCCESS) {
fil_iterator_t iter;
iter.file = file;
iter.start = 0;
iter.end = file_size;
iter.filepath = filepath;
iter.file_size = file_size;
iter.n_io_buffers = n_io_buffers;
iter.page_size = callback.get_page_size().physical();
/* read (optional) crypt data */
iter.crypt_data = fil_space_read_crypt_data(
0, page, FSP_HEADER_OFFSET
+ fsp_header_get_encryption_offset(
callback.get_page_size()));
#ifdef MYSQL_ENCRYPTION
/* Set encryption info. */
iter.encryption_key = table->encryption_key;
iter.encryption_iv = table->encryption_iv;
/* Check encryption is matched or not. */
ulint space_flags = callback.get_space_flags();
if (FSP_FLAGS_GET_ENCRYPTION(space_flags)) {
ut_ad(table->encryption_key != NULL);
if (!dict_table_is_encrypted(table)) {
ib::error() << "Table is not in an encrypted"
" tablespace, but the data file which"
" trying to import is an encrypted"
" tablespace";
err = DB_IO_NO_ENCRYPT_TABLESPACE;
}
}
#endif /* MYSQL_ENCRYPTION */
if (err == DB_SUCCESS) {
/* Compressed pages can't be optimised for block IO
for now. We do the IMPORT page by page. */
if (callback.get_page_size().is_compressed()) {
iter.n_io_buffers = 1;
ut_a(iter.page_size
== callback.get_page_size().physical());
}
/** Add an extra page for compressed page scratch
area. */
void* io_buffer = ut_malloc_nokey(
(2 + iter.n_io_buffers) * UNIV_PAGE_SIZE);
iter.io_buffer = static_cast<byte*>(
ut_align(io_buffer, UNIV_PAGE_SIZE));
void* crypt_io_buffer;
if (iter.crypt_data) {
crypt_io_buffer = static_cast<byte*>(
ut_malloc_nokey((2 + iter.n_io_buffers)
* UNIV_PAGE_SIZE));
iter.crypt_io_buffer = static_cast<byte*>(
ut_align(crypt_io_buffer,
UNIV_PAGE_SIZE));
} else {
crypt_io_buffer = NULL;
}
err = fil_iterate(iter, block, callback);
ut_free(io_buffer);
ut_free(crypt_io_buffer);
fil_space_destroy_crypt_data(&iter.crypt_data);
}
}
if (err == DB_SUCCESS) {
ib::info() << "Sync to disk";
if (!os_file_flush(file)) {
ib::info() << "os_file_flush() failed!";
err = DB_IO_ERROR;
} else {
ib::info() << "Sync to disk - done!";
}
}
os_file_close(file);
ut_free(page_ptr);
ut_free(filepath);
mutex_free(&block->mutex);
ut_free(block);
return(err);
}
/** Set the tablespace table size.
@param[in] page a page belonging to the tablespace */
void
PageCallback::set_page_size(
const buf_frame_t* page) UNIV_NOTHROW
{
m_page_size.copy_from(fsp_header_get_page_size(page));
}
/********************************************************************//**
Delete the tablespace file and any related files like .cfg.
This should not be called for temporary tables.
@param[in] ibd_filepath File path of the IBD tablespace */
void
fil_delete_file(
/*============*/
const char* ibd_filepath)
{
/* Force a delete of any stale .ibd files that are lying around. */
ib::info() << "Deleting " << ibd_filepath;
os_file_delete_if_exists(innodb_data_file_key, ibd_filepath, NULL);
char* cfg_filepath = fil_make_filepath(
ibd_filepath, NULL, CFG, false);
if (cfg_filepath != NULL) {
os_file_delete_if_exists(
innodb_data_file_key, cfg_filepath, NULL);
ut_free(cfg_filepath);
}
}
/**
Iterate over all the spaces in the space list and fetch the
tablespace names. It will return a copy of the name that must be
freed by the caller using: delete[].
@return DB_SUCCESS if all OK. */
dberr_t
fil_get_space_names(
/*================*/
space_name_list_t& space_name_list)
/*!< in/out: List to append to */
{
fil_space_t* space;
dberr_t err = DB_SUCCESS;
mutex_enter(&fil_system->mutex);
for (space = UT_LIST_GET_FIRST(fil_system->space_list);
space != NULL;
space = UT_LIST_GET_NEXT(space_list, space)) {
if (space->purpose == FIL_TYPE_TABLESPACE) {
ulint len;
char* name;
len = ::strlen(space->name);
name = UT_NEW_ARRAY_NOKEY(char, len + 1);
if (name == 0) {
/* Caller to free elements allocated so far. */
err = DB_OUT_OF_MEMORY;
break;
}
memcpy(name, space->name, len);
name[len] = 0;
space_name_list.push_back(name);
}
}
mutex_exit(&fil_system->mutex);
return(err);
}
/** Generate redo log for swapping two .ibd files
@param[in] old_table old table
@param[in] new_table new table
@param[in] tmp_name temporary table name
@param[in,out] mtr mini-transaction
@return innodb error code */
dberr_t
fil_mtr_rename_log(
const dict_table_t* old_table,
const dict_table_t* new_table,
const char* tmp_name,
mtr_t* mtr)
{
dberr_t err;
bool old_is_file_per_table =
!is_system_tablespace(old_table->space)
&& !DICT_TF_HAS_SHARED_SPACE(old_table->flags);
bool new_is_file_per_table =
!is_system_tablespace(new_table->space)
&& !DICT_TF_HAS_SHARED_SPACE(new_table->flags);
/* If neither table is file-per-table,
there will be no renaming of files. */
if (!old_is_file_per_table && !new_is_file_per_table) {
return(DB_SUCCESS);
}
const char* old_dir = DICT_TF_HAS_DATA_DIR(old_table->flags)
? old_table->data_dir_path
: NULL;
char* old_path = fil_make_filepath(
old_dir, old_table->name.m_name, IBD, (old_dir != NULL));
if (old_path == NULL) {
return(DB_OUT_OF_MEMORY);
}
if (old_is_file_per_table) {
char* tmp_path = fil_make_filepath(
old_dir, tmp_name, IBD, (old_dir != NULL));
if (tmp_path == NULL) {
ut_free(old_path);
return(DB_OUT_OF_MEMORY);
}
/* Temp filepath must not exist. */
err = fil_rename_tablespace_check(
old_table->space, old_path, tmp_path,
dict_table_is_discarded(old_table));
if (err != DB_SUCCESS) {
ut_free(old_path);
ut_free(tmp_path);
return(err);
}
fil_name_write_rename(
old_table->space, 0, old_path, tmp_path, mtr);
ut_free(tmp_path);
}
if (new_is_file_per_table) {
const char* new_dir = DICT_TF_HAS_DATA_DIR(new_table->flags)
? new_table->data_dir_path
: NULL;
char* new_path = fil_make_filepath(
new_dir, new_table->name.m_name,
IBD, (new_dir != NULL));
if (new_path == NULL) {
ut_free(old_path);
return(DB_OUT_OF_MEMORY);
}
/* Destination filepath must not exist unless this ALTER
TABLE starts and ends with a file_per-table tablespace. */
if (!old_is_file_per_table) {
err = fil_rename_tablespace_check(
new_table->space, new_path, old_path,
dict_table_is_discarded(new_table));
if (err != DB_SUCCESS) {
ut_free(old_path);
ut_free(new_path);
return(err);
}
}
fil_name_write_rename(
new_table->space, 0, new_path, old_path, mtr);
ut_free(new_path);
}
ut_free(old_path);
return(DB_SUCCESS);
}
#ifdef UNIV_DEBUG
/** Check that a tablespace is valid for mtr_commit().
@param[in] space persistent tablespace that has been changed */
static
void
fil_space_validate_for_mtr_commit(
const fil_space_t* space)
{
ut_ad(!mutex_own(&fil_system->mutex));
ut_ad(space != NULL);
ut_ad(space->purpose == FIL_TYPE_TABLESPACE);
ut_ad(!is_predefined_tablespace(space->id));
/* We are serving mtr_commit(). While there is an active
mini-transaction, we should have !space->stop_new_ops. This is
guaranteed by meta-data locks or transactional locks, or
dict_operation_lock (X-lock in DROP, S-lock in purge).
However, a file I/O thread can invoke change buffer merge
while fil_check_pending_operations() is waiting for operations
to quiesce. This is not a problem, because
ibuf_merge_or_delete_for_page() would call
fil_space_acquire() before mtr_start() and
fil_space_release() after mtr_commit(). This is why
n_pending_ops should not be zero if stop_new_ops is set. */
ut_ad(!space->stop_new_ops
|| space->is_being_truncated /* TRUNCATE sets stop_new_ops */
|| space->n_pending_ops > 0);
}
#endif /* UNIV_DEBUG */
/** Write a MLOG_FILE_NAME record for a persistent tablespace.
@param[in] space tablespace
@param[in,out] mtr mini-transaction */
static
void
fil_names_write(
const fil_space_t* space,
mtr_t* mtr)
{
ut_ad(UT_LIST_GET_LEN(space->chain) == 1);
fil_name_write(space, 0, UT_LIST_GET_FIRST(space->chain), mtr);
}
/** Note that a non-predefined persistent tablespace has been modified
by redo log.
@param[in,out] space tablespace */
void
fil_names_dirty(
fil_space_t* space)
{
ut_ad(log_mutex_own());
ut_ad(recv_recovery_is_on());
ut_ad(log_sys->lsn != 0);
ut_ad(space->max_lsn == 0);
ut_d(fil_space_validate_for_mtr_commit(space));
UT_LIST_ADD_LAST(fil_system->named_spaces, space);
space->max_lsn = log_sys->lsn;
}
/** Write MLOG_FILE_NAME records when a non-predefined persistent
tablespace was modified for the first time since the latest
fil_names_clear().
@param[in,out] space tablespace
@param[in,out] mtr mini-transaction */
void
fil_names_dirty_and_write(
fil_space_t* space,
mtr_t* mtr)
{
ut_ad(log_mutex_own());
ut_d(fil_space_validate_for_mtr_commit(space));
ut_ad(space->max_lsn == log_sys->lsn);
UT_LIST_ADD_LAST(fil_system->named_spaces, space);
fil_names_write(space, mtr);
DBUG_EXECUTE_IF("fil_names_write_bogus",
{
char bogus_name[] = "./test/bogus file.ibd";
os_normalize_path(bogus_name);
fil_name_write(
SRV_LOG_SPACE_FIRST_ID, 0,
bogus_name, mtr);
});
}
/** On a log checkpoint, reset fil_names_dirty_and_write() flags
and write out MLOG_FILE_NAME and MLOG_CHECKPOINT if needed.
@param[in] lsn checkpoint LSN
@param[in] do_write whether to always write MLOG_CHECKPOINT
@return whether anything was written to the redo log
@retval false if no flags were set and nothing written
@retval true if anything was written to the redo log */
bool
fil_names_clear(
lsn_t lsn,
bool do_write)
{
mtr_t mtr;
ut_ad(log_mutex_own());
if (log_sys->append_on_checkpoint) {
mtr_write_log(log_sys->append_on_checkpoint);
do_write = true;
}
mtr.start();
for (fil_space_t* space = UT_LIST_GET_FIRST(fil_system->named_spaces);
space != NULL; ) {
fil_space_t* next = UT_LIST_GET_NEXT(named_spaces, space);
ut_ad(space->max_lsn > 0);
if (space->max_lsn < lsn) {
/* The tablespace was last dirtied before the
checkpoint LSN. Remove it from the list, so
that if the tablespace is not going to be
modified any more, subsequent checkpoints will
avoid calling fil_names_write() on it. */
space->max_lsn = 0;
UT_LIST_REMOVE(fil_system->named_spaces, space);
}
/* max_lsn is the last LSN where fil_names_dirty_and_write()
was called. If we kept track of "min_lsn" (the first LSN
where max_lsn turned nonzero), we could avoid the
fil_names_write() call if min_lsn > lsn. */
fil_names_write(space, &mtr);
do_write = true;
space = next;
}
if (do_write) {
mtr.commit_checkpoint(lsn);
} else {
ut_ad(!mtr.has_modifications());
}
return(do_write);
}
/** Truncate a single-table tablespace. The tablespace must be cached
in the memory cache.
@param space_id space id
@param dir_path directory path
@param tablename the table name in the usual
databasename/tablename format of InnoDB
@param flags tablespace flags
@param trunc_to_default truncate to default size if tablespace
is being newly re-initialized.
@return DB_SUCCESS or error */
dberr_t
truncate_t::truncate(
/*=================*/
ulint space_id,
const char* dir_path,
const char* tablename,
ulint flags,
bool trunc_to_default)
{
dberr_t err = DB_SUCCESS;
char* path;
bool has_data_dir = FSP_FLAGS_HAS_DATA_DIR(flags);
ut_a(!is_system_tablespace(space_id));
if (has_data_dir) {
ut_ad(dir_path != NULL);
path = fil_make_filepath(dir_path, tablename, IBD, true);
} else {
path = fil_make_filepath(NULL, tablename, IBD, false);
}
if (path == NULL) {
return(DB_OUT_OF_MEMORY);
}
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(space_id);
/* The following code must change when InnoDB supports
multiple datafiles per tablespace. */
ut_a(UT_LIST_GET_LEN(space->chain) == 1);
fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
if (trunc_to_default) {
space->size = node->size = FIL_IBD_FILE_INITIAL_SIZE;
}
const bool already_open = node->is_open;
if (!already_open) {
bool ret;
node->handle = os_file_create_simple_no_error_handling(
innodb_data_file_key, path, OS_FILE_OPEN,
OS_FILE_READ_WRITE,
fsp_is_system_temporary(space_id)
? false : srv_read_only_mode, &ret);
if (!ret) {
ib::error() << "Failed to open tablespace file "
<< path << ".";
ut_free(path);
return(DB_ERROR);
}
node->is_open = true;
}
os_offset_t trunc_size = trunc_to_default
? FIL_IBD_FILE_INITIAL_SIZE
: space->size;
const bool success = os_file_truncate(
path, node->handle, trunc_size * UNIV_PAGE_SIZE);
if (!success) {
ib::error() << "Cannot truncate file " << path
<< " in TRUNCATE TABLESPACE.";
err = DB_ERROR;
}
space->stop_new_ops = false;
space->is_being_truncated = false;
/* If we opened the file in this function, close it. */
if (!already_open) {
bool closed = os_file_close(node->handle);
if (!closed) {
ib::error() << "Failed to close tablespace file "
<< path << ".";
err = DB_ERROR;
} else {
node->is_open = false;
}
}
mutex_exit(&fil_system->mutex);
ut_free(path);
return(err);
}
/**
Note that the file system where the file resides doesn't support PUNCH HOLE.
Called from AIO handlers when IO returns DB_IO_NO_PUNCH_HOLE
@param[in,out] node Node to set */
void
fil_no_punch_hole(fil_node_t* node)
{
node->punch_hole = false;
}
#ifdef MYSQL_COMPRESSION
/** Set the compression type for the tablespace of a table
@param[in] table The table that should be compressed
@param[in] algorithm Text representation of the algorithm
@return DB_SUCCESS or error code */
dberr_t
fil_set_compression(
dict_table_t* table,
const char* algorithm)
{
ut_ad(table != NULL);
/* We don't support Page Compression for the system tablespace,
the temporary tablespace, or any general tablespace because
COMPRESSION is set by TABLE DDL, not TABLESPACE DDL. There is
no other technical reason. Also, do not use it for missing
tables or tables with compressed row_format. */
if (table->ibd_file_missing
|| !DICT_TF2_FLAG_IS_SET(table, DICT_TF2_USE_FILE_PER_TABLE)
|| DICT_TF2_FLAG_IS_SET(table, DICT_TF2_TEMPORARY)
|| page_size_t(table->flags).is_compressed()) {
return(DB_IO_NO_PUNCH_HOLE_TABLESPACE);
}
dberr_t err;
Compression compression;
if (algorithm == NULL || strlen(algorithm) == 0) {
#ifndef UNIV_DEBUG
compression.m_type = Compression::NONE;
#else
/* This is a Debug tool for setting compression on all
compressible tables not otherwise specified. */
switch (srv_debug_compress) {
case Compression::LZ4:
case Compression::ZLIB:
case Compression::NONE:
compression.m_type =
static_cast<Compression::Type>(
srv_debug_compress);
break;
default:
compression.m_type = Compression::NONE;
}
#endif /* UNIV_DEBUG */
err = DB_SUCCESS;
} else {
err = Compression::check(algorithm, &compression);
}
fil_space_t* space = fil_space_get(table->space);
if (space == NULL) {
return(DB_NOT_FOUND);
}
space->compression_type = compression.m_type;
if (space->compression_type != Compression::NONE) {
const fil_node_t* node;
node = UT_LIST_GET_FIRST(space->chain);
if (!node->punch_hole) {
return(DB_IO_NO_PUNCH_HOLE_FS);
}
}
return(err);
}
/** Get the compression algorithm for a tablespace.
@param[in] space_id Space ID to check
@return the compression algorithm */
Compression::Type
fil_get_compression(
ulint space_id)
{
fil_space_t* space = fil_space_get(space_id);
return(space == NULL ? Compression::NONE : space->compression_type);
}
/** Set the encryption type for the tablespace
@param[in] space_id Space ID of tablespace for which to set
@param[in] algorithm Encryption algorithm
@param[in] key Encryption key
@param[in] iv Encryption iv
@return DB_SUCCESS or error code */
dberr_t
fil_set_encryption(
ulint space_id,
Encryption::Type algorithm,
byte* key,
byte* iv)
{
ut_ad(!is_system_or_undo_tablespace(space_id));
if (is_system_tablespace(space_id)) {
return(DB_IO_NO_ENCRYPT_TABLESPACE);
}
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_by_id(space_id);
if (space == NULL) {
mutex_exit(&fil_system->mutex);
return(DB_NOT_FOUND);
}
ut_ad(algorithm != Encryption::NONE);
space->encryption_type = algorithm;
if (key == NULL) {
Encryption::random_value(space->encryption_key);
} else {
memcpy(space->encryption_key,
key, ENCRYPTION_KEY_LEN);
}
space->encryption_klen = ENCRYPTION_KEY_LEN;
if (iv == NULL) {
Encryption::random_value(space->encryption_iv);
} else {
memcpy(space->encryption_iv,
iv, ENCRYPTION_KEY_LEN);
}
mutex_exit(&fil_system->mutex);
return(DB_SUCCESS);
}
/** Rotate the tablespace keys by new master key.
@return true if the re-encrypt suceeds */
bool
fil_encryption_rotate()
{
fil_space_t* space;
mtr_t mtr;
byte encrypt_info[ENCRYPTION_INFO_SIZE_V2];
for (space = UT_LIST_GET_FIRST(fil_system->space_list);
space != NULL; ) {
/* Skip unencypted tablespaces. */
if (is_system_or_undo_tablespace(space->id)
|| fsp_is_system_temporary(space->id)
|| space->purpose == FIL_TYPE_LOG) {
space = UT_LIST_GET_NEXT(space_list, space);
continue;
}
if (space->encryption_type != Encryption::NONE) {
mtr_start(&mtr);
mtr.set_named_space(space->id);
space = mtr_x_lock_space(space->id, &mtr);
memset(encrypt_info, 0, ENCRYPTION_INFO_SIZE_V2);
if (!fsp_header_rotate_encryption(space,
encrypt_info,
&mtr)) {
mtr_commit(&mtr);
return(false);
}
mtr_commit(&mtr);
}
space = UT_LIST_GET_NEXT(space_list, space);
DBUG_EXECUTE_IF("ib_crash_during_rotation_for_encryption",
DBUG_SUICIDE(););
}
return(true);
}
#endif /* MYSQL_COMPRESSION */
/** Build the basic folder name from the path and length provided
@param[in] path pathname (may also include the file basename)
@param[in] len length of the path, in bytes */
void
Folder::make_path(const char* path, size_t len)
{
if (is_absolute_path(path)) {
m_folder = mem_strdupl(path, len);
m_folder_len = len;
}
else {
size_t n = 2 + len + strlen(fil_path_to_mysql_datadir);
m_folder = static_cast<char*>(ut_malloc_nokey(n));
m_folder_len = 0;
if (path != fil_path_to_mysql_datadir) {
/* Put the mysqld datadir into m_folder first. */
ut_ad(fil_path_to_mysql_datadir[0] != '\0');
m_folder_len = strlen(fil_path_to_mysql_datadir);
memcpy(m_folder, fil_path_to_mysql_datadir,
m_folder_len);
if (m_folder[m_folder_len - 1] != OS_PATH_SEPARATOR) {
m_folder[m_folder_len++] = OS_PATH_SEPARATOR;
}
}
/* Append the path. */
memcpy(m_folder + m_folder_len, path, len);
m_folder_len += len;
m_folder[m_folder_len] = '\0';
}
os_normalize_path(m_folder);
}
/** Resolve a relative path in m_folder to an absolute path
in m_abs_path setting m_abs_len. */
void
Folder::make_abs_path()
{
my_realpath(m_abs_path, m_folder, MYF(0));
m_abs_len = strlen(m_abs_path);
ut_ad(m_abs_len + 1 < sizeof(m_abs_path));
/* Folder::related_to() needs a trailing separator. */
if (m_abs_path[m_abs_len - 1] != OS_PATH_SEPARATOR) {
m_abs_path[m_abs_len] = OS_PATH_SEPARATOR;
m_abs_path[++m_abs_len] = '\0';
}
}
/** Constructor
@param[in] path pathname (may also include the file basename)
@param[in] len length of the path, in bytes */
Folder::Folder(const char* path, size_t len)
{
make_path(path, len);
make_abs_path();
}
/** Assignment operator
@param[in] folder folder string provided */
class Folder&
Folder::operator=(const char* path)
{
ut_free(m_folder);
make_path(path, strlen(path));
make_abs_path();
return(*this);
}
/** Determine if two folders are equal
@param[in] other folder to compare to
@return whether the folders are equal */
bool Folder::operator==(const Folder& other) const
{
return(m_abs_len == other.m_abs_len
&& !memcmp(m_abs_path, other.m_abs_path, m_abs_len));
}
/** Determine if the left folder is the same or an ancestor of
(contains) the right folder.
@param[in] other folder to compare to
@return whether this is the same or an ancestor of the other folder. */
bool Folder::operator>=(const Folder& other) const
{
return(m_abs_len <= other.m_abs_len
&& (!memcmp(other.m_abs_path, m_abs_path, m_abs_len)));
}
/** Determine if the left folder is an ancestor of (contains)
the right folder.
@param[in] other folder to compare to
@return whether this is an ancestor of the other folder */
bool Folder::operator>(const Folder& other) const
{
return(m_abs_len < other.m_abs_len
&& (!memcmp(other.m_abs_path, m_abs_path, m_abs_len)));
}
/** Determine if the directory referenced by m_folder exists.
@return whether the directory exists */
bool
Folder::exists()
{
bool exists;
os_file_type_t type;
#ifdef _WIN32
/* Temporarily strip the trailing_separator since it will cause
_stat64() to fail on Windows unless the path is the root of some
drive; like "c:\". _stat64() will fail if it is "c:". */
size_t len = strlen(m_abs_path);
if (m_abs_path[m_abs_len - 1] == OS_PATH_SEPARATOR
&& m_abs_path[m_abs_len - 2] != ':') {
m_abs_path[m_abs_len - 1] = '\0';
}
#endif /* WIN32 */
bool ret = os_file_status(m_abs_path, &exists, &type);
#ifdef _WIN32
/* Put the separator back on. */
if (m_abs_path[m_abs_len - 1] == '\0') {
m_abs_path[m_abs_len - 1] = OS_PATH_SEPARATOR;
}
#endif /* WIN32 */
return(ret && exists && type == OS_FILE_TYPE_DIR);
}
/* Unit Tests */
#ifdef UNIV_ENABLE_UNIT_TEST_MAKE_FILEPATH
#define MF fil_make_filepath
#define DISPLAY ib::info() << path
void
test_make_filepath()
{
char* path;
const char* long_path =
"this/is/a/very/long/path/including/a/very/"
"looooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooooo"
"oooooooooooooooooooooooooooooooooooooooooooooooong"
"/folder/name";
path = MF("/this/is/a/path/with/a/filename", NULL, IBD, false); DISPLAY;
path = MF("/this/is/a/path/with/a/filename", NULL, ISL, false); DISPLAY;
path = MF("/this/is/a/path/with/a/filename", NULL, CFG, false); DISPLAY;
path = MF("/this/is/a/path/with/a/filename", NULL, CFP, false); DISPLAY;
path = MF("/this/is/a/path/with/a/filename.ibd", NULL, IBD, false); DISPLAY;
path = MF("/this/is/a/path/with/a/filename.ibd", NULL, IBD, false); DISPLAY;
path = MF("/this/is/a/path/with/a/filename.dat", NULL, IBD, false); DISPLAY;
path = MF(NULL, "tablespacename", NO_EXT, false); DISPLAY;
path = MF(NULL, "tablespacename", IBD, false); DISPLAY;
path = MF(NULL, "dbname/tablespacename", NO_EXT, false); DISPLAY;
path = MF(NULL, "dbname/tablespacename", IBD, false); DISPLAY;
path = MF(NULL, "dbname/tablespacename", ISL, false); DISPLAY;
path = MF(NULL, "dbname/tablespacename", CFG, false); DISPLAY;
path = MF(NULL, "dbname/tablespacename", CFP, false); DISPLAY;
path = MF(NULL, "dbname\\tablespacename", NO_EXT, false); DISPLAY;
path = MF(NULL, "dbname\\tablespacename", IBD, false); DISPLAY;
path = MF("/this/is/a/path", "dbname/tablespacename", IBD, false); DISPLAY;
path = MF("/this/is/a/path", "dbname/tablespacename", IBD, true); DISPLAY;
path = MF("./this/is/a/path", "dbname/tablespacename.ibd", IBD, true); DISPLAY;
path = MF("this\\is\\a\\path", "dbname/tablespacename", IBD, true); DISPLAY;
path = MF("/this/is/a/path", "dbname\\tablespacename", IBD, true); DISPLAY;
path = MF(long_path, NULL, IBD, false); DISPLAY;
path = MF(long_path, "tablespacename", IBD, false); DISPLAY;
path = MF(long_path, "tablespacename", IBD, true); DISPLAY;
}
#endif /* UNIV_ENABLE_UNIT_TEST_MAKE_FILEPATH */
/* @} */
/** Release the reserved free extents.
@param[in] n_reserved number of reserved extents */
void
fil_space_t::release_free_extents(ulint n_reserved)
{
ut_ad(rw_lock_own(&latch, RW_LOCK_X));
ut_a(n_reserved_extents >= n_reserved);
n_reserved_extents -= n_reserved;
}
/******************************************************************
Get crypt data for a tablespace */
UNIV_INTERN
fil_space_crypt_t*
fil_space_get_crypt_data(
/*=====================*/
ulint id) /*!< in: space id */
{
fil_space_t* space;
fil_space_crypt_t* crypt_data = NULL;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
mutex_exit(&fil_system->mutex);
if (space != NULL) {
/* If we have not yet read the page0
of this tablespace we will do it now. */
if (!space->crypt_data && !space->page_0_crypt_read) {
ulint space_id = space->id;
fil_node_t* node;
ut_a(space->crypt_data == NULL);
node = UT_LIST_GET_FIRST(space->chain);
byte *buf = static_cast<byte*>(ut_malloc(2 * UNIV_PAGE_SIZE, PSI_INSTRUMENT_ME));
byte *page = static_cast<byte*>(ut_align(buf, UNIV_PAGE_SIZE));
fil_read(page_id_t(space_id, 0), univ_page_size, 0, univ_page_size.physical(),
page);
ulint flags = fsp_header_get_flags(page);
ulint offset = FSP_HEADER_OFFSET
+ fsp_header_get_encryption_offset(
page_size_t(flags));
space->crypt_data = fil_space_read_crypt_data(space_id, page, offset);
ut_free(buf);
#ifdef UNIV_DEBUG
ib::info() << "Read page 0 from tablespace for"
<< "space " << space_id
<< " name " << space->name
<< " key_id " << (space->crypt_data ? space->crypt_data->key_id : 0)
<< " encryption " << (space->crypt_data ? space->crypt_data->encryption : 0)
<< " handle " << node->handle;
#endif
ut_a(space->id == space_id);
space->page_0_crypt_read = true;
}
crypt_data = space->crypt_data;
if (!space->page_0_crypt_read) {
ib::warn() << "Space " << space->id << " name "
<< space->name << " contains encryption "
<< (space->crypt_data ? space->crypt_data->encryption : 0)
<< " information for key_id "
<< (space->crypt_data ? space->crypt_data->key_id : 0)
<< " but page0 is not read.";
}
}
return(crypt_data);
}
/*******************************************************************//**
Increments the count of pending operation, if space is not being deleted.
@return TRUE if being deleted, and operation should be skipped */
UNIV_INTERN
ibool
fil_inc_pending_ops(
/*================*/
ulint id, /*!< in: space id */
ibool print_err) /*!< in: need to print error or not */
{
fil_space_t* space;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
if (space == NULL) {
if (print_err) {
fprintf(stderr,
"InnoDB: Error: trying to do an operation on a"
" dropped tablespace %lu\n",
(ulong) id);
}
}
if (space == NULL || space->stop_new_ops) {
mutex_exit(&fil_system->mutex);
return(TRUE);
}
space->n_pending_ops++;
mutex_exit(&fil_system->mutex);
return(FALSE);
}
/*******************************************************************//**
Decrements the count of pending operations. */
UNIV_INTERN
void
fil_decr_pending_ops(
/*=================*/
ulint id) /*!< in: space id */
{
fil_space_t* space;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
if (space == NULL) {
fprintf(stderr,
"InnoDB: Error: decrementing pending operation"
" of a dropped tablespace %lu\n",
(ulong) id);
}
if (space != NULL) {
space->n_pending_ops--;
}
mutex_exit(&fil_system->mutex);
}
/******************************************************************
Set crypt data for a tablespace */
UNIV_INTERN
fil_space_crypt_t*
fil_space_set_crypt_data(
/*=====================*/
ulint id, /*!< in: space id */
fil_space_crypt_t* crypt_data) /*!< in: crypt data */
{
fil_space_t* space;
fil_space_crypt_t* free_crypt_data = NULL;
fil_space_crypt_t* ret_crypt_data = NULL;
ut_ad(fil_system);
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
if (space != NULL) {
if (space->crypt_data != NULL) {
/* Here we need to release fil_system mutex to
avoid mutex deadlock assertion. Here we would
taje mutexes in order fil_system, crypt_data and
in fil_crypt_start_encrypting_space we would
take them in order crypt_data, fil_system
at fil_space_get_flags -> fil_space_get_space */
mutex_exit(&fil_system->mutex);
fil_space_merge_crypt_data(space->crypt_data,
crypt_data);
ret_crypt_data = space->crypt_data;
free_crypt_data = crypt_data;
} else {
space->crypt_data = crypt_data;
ret_crypt_data = space->crypt_data;
mutex_exit(&fil_system->mutex);
}
} else {
/* there is a small risk that tablespace has been deleted */
free_crypt_data = crypt_data;
mutex_exit(&fil_system->mutex);
}
if (free_crypt_data != NULL) {
/* there was already crypt data present and the new crypt
* data provided as argument to this function has been merged
* into that => free new crypt data
*/
fil_space_destroy_crypt_data(&free_crypt_data);
}
return ret_crypt_data;
}
/******************************************************************
Get id of first tablespace that has node or ULINT_UNDEFINED if none */
UNIV_INTERN
ulint
fil_get_first_space_safe()
/*======================*/
{
ulint out_id = ULINT_UNDEFINED;
fil_space_t* space;
mutex_enter(&fil_system->mutex);
space = UT_LIST_GET_FIRST(fil_system->space_list);
if (space != NULL) {
do
{
if (!space->stop_new_ops && UT_LIST_GET_LEN(space->chain) > 0) {
out_id = space->id;
break;
}
space = UT_LIST_GET_NEXT(space_list, space);
} while (space != NULL);
}
mutex_exit(&fil_system->mutex);
return out_id;
}
/******************************************************************
Get id of next tablespace that has node or ULINT_UNDEFINED if none */
UNIV_INTERN
ulint
fil_get_next_space_safe(
/*====================*/
ulint id) /*!< in: previous space id */
{
bool found;
fil_space_t* space;
ulint out_id = ULINT_UNDEFINED;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
if (space == NULL) {
/* we didn't find it...search for space with space->id > id */
found = false;
space = UT_LIST_GET_FIRST(fil_system->space_list);
} else {
/* we found it, take next available space */
found = true;
}
while ((space = UT_LIST_GET_NEXT(space_list, space)) != NULL) {
if (!found && space->id <= id)
continue;
if (!space->stop_new_ops) {
/* inc reference to prevent drop */
out_id = space->id;
break;
}
}
mutex_exit(&fil_system->mutex);
return out_id;
}
/********************************************************************//**
Find correct node from file space
@return node */
static
fil_node_t*
fil_space_get_node(
fil_space_t* space, /*!< in: file spage */
ulint space_id, /*!< in: space id */
ulint* block_offset, /*!< in/out: 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 */
{
fil_node_t* node;
ut_ad(mutex_own(&fil_system->mutex));
node = UT_LIST_GET_FIRST(space->chain);
for (;;) {
if (node == NULL) {
return(NULL);
} else if (fil_is_user_tablespace_id(space->id)
&& node->size == 0) {
/* We do not know the size of a single-table tablespace
before we open the file */
break;
} else if (node->size > *block_offset) {
/* Found! */
break;
} else {
*block_offset -= node->size;
node = UT_LIST_GET_NEXT(chain, node);
}
}
return (node);
}
/********************************************************************//**
Return block size of node in file space
@return file block size */
UNIV_INTERN
ulint
fil_space_get_block_size(
/*=====================*/
ulint space_id,
ulint block_offset,
ulint len)
{
ulint block_size = 512;
ut_ad(!mutex_own(&fil_system->mutex));
mutex_enter(&fil_system->mutex);
fil_space_t* space = fil_space_get_space(space_id);
if (space) {
fil_node_t* node = fil_space_get_node(space, space_id, &block_offset, 0, len);
if (node) {
block_size = node->block_size;
}
}
/* Currently supporting block size up to 4K,
fall back to default if bigger requested. */
if (block_size > 4096) {
block_size = 512;
}
mutex_exit(&fil_system->mutex);
return block_size;
}
/*******************************************************************//**
Returns the table space by a given id, NULL if not found. */
fil_space_t*
fil_space_found_by_id(
/*==================*/
ulint id) /*!< in: space id */
{
fil_space_t* space = NULL;
mutex_enter(&fil_system->mutex);
space = fil_space_get_by_id(id);
/* Not found if space is being deleted */
if (space && space->stop_new_ops) {
space = NULL;
}
mutex_exit(&fil_system->mutex);
return space;
}
/****************************************************************//**
Acquire fil_system mutex */
void
fil_system_enter(void)
/*==================*/
{
ut_ad(!mutex_own(&fil_system->mutex));
mutex_enter(&fil_system->mutex);
}
/****************************************************************//**
Release fil_system mutex */
void
fil_system_exit(void)
/*=================*/
{
ut_ad(mutex_own(&fil_system->mutex));
mutex_exit(&fil_system->mutex);
}
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