diff options
Diffstat (limited to 'storage/innobase/include/buf0rea.h')
| -rw-r--r-- | storage/innobase/include/buf0rea.h | 52 |
1 files changed, 16 insertions, 36 deletions
diff --git a/storage/innobase/include/buf0rea.h b/storage/innobase/include/buf0rea.h index 3dd085dd..46d08243 100644 --- a/storage/innobase/include/buf0rea.h +++ b/storage/innobase/include/buf0rea.h @@ -1,7 +1,7 @@ /***************************************************************************** Copyright (c) 1995, 2015, Oracle and/or its affiliates. All Rights Reserved. -Copyright (c) 2015, 2021, MariaDB Corporation. +Copyright (c) 2015, 2023, 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 @@ -24,8 +24,7 @@ The database buffer read Created 11/5/1995 Heikki Tuuri *******************************************************/ -#ifndef buf0rea_h -#define buf0rea_h +#pragma once #include "buf0buf.h" @@ -33,15 +32,17 @@ Created 11/5/1995 Heikki Tuuri buffer buf_pool if it is not already there. Sets the io_fix flag and sets an exclusive lock on the buffer frame. The flag is cleared and the x-lock released by the i/o-handler thread. -@param page_id page id -@param zip_size ROW_FORMAT=COMPRESSED page size, or 0 -@retval DB_SUCCESS if the page was read and is not corrupted +@param page_id page id +@param zip_size ROW_FORMAT=COMPRESSED page size, or 0 +@param chain buf_pool.page_hash cell for page_id +@retval DB_SUCCESS if the page was read and is not corrupted, @retval DB_SUCCESS_LOCKED_REC if the page was not read -@retval DB_PAGE_CORRUPTED if page based on checksum check is corrupted +@retval DB_PAGE_CORRUPTED if page based on checksum check is corrupted, @retval DB_DECRYPTION_FAILED if page post encryption checksum matches but after decryption normal page checksum does not match. @retval DB_TABLESPACE_DELETED if tablespace .ibd file is missing */ -dberr_t buf_read_page(const page_id_t page_id, ulint zip_size); +dberr_t buf_read_page(const page_id_t page_id, ulint zip_size, + buf_pool_t::hash_chain &chain); /** High-level function which reads a page asynchronously from a file to the buffer buf_pool if it is not already there. Sets the io_fix flag and sets @@ -57,21 +58,14 @@ void buf_read_page_background(fil_space_t *space, const page_id_t page_id, /** Applies a random read-ahead in buf_pool if there are at least a threshold value of accessed pages from the random read-ahead area. Does not read any page, not even the one at the position (space, offset), if the read-ahead -mechanism is not activated. NOTE 1: the calling thread may own latches on +mechanism is not activated. NOTE: the calling thread may own latches on pages: to avoid deadlocks this function must be written such that it cannot -end up waiting for these latches! NOTE 2: the calling thread must want -access to the page given: this rule is set to prevent unintended read-aheads -performed by ibuf routines, a situation which could result in a deadlock if -the OS does not support asynchronous i/o. +end up waiting for these latches! @param[in] page_id page id of a page which the current thread wants to access @param[in] zip_size ROW_FORMAT=COMPRESSED page size, or 0 -@param[in] ibuf whether we are inside ibuf routine -@return number of page read requests issued; NOTE that if we read ibuf -pages, it may happen that the page at the given page number does not -get read even if we return a positive value! */ -ulint -buf_read_ahead_random(const page_id_t page_id, ulint zip_size, bool ibuf); +@return number of page read requests issued */ +ulint buf_read_ahead_random(const page_id_t page_id, ulint zip_size); /** Applies linear read-ahead if in the buf_pool the page is a border page of a linear read-ahead area and all the pages in the area have been accessed. @@ -92,29 +86,15 @@ only very improbably. NOTE 2: the calling thread may own latches on pages: to avoid deadlocks this function must be written such that it cannot end up waiting for these latches! -NOTE 3: the calling thread must want access to the page given: this rule is -set to prevent unintended read-aheads performed by ibuf routines, a situation -which could result in a deadlock if the OS does not support asynchronous io. @param[in] page_id page id; see NOTE 3 above @param[in] zip_size ROW_FORMAT=COMPRESSED page size, or 0 -@param[in] ibuf whether if we are inside ibuf routine @return number of page read requests issued */ -ulint -buf_read_ahead_linear(const page_id_t page_id, ulint zip_size, bool ibuf); +ulint buf_read_ahead_linear(const page_id_t page_id, ulint zip_size); /** Schedule a page for recovery. @param space tablespace @param page_id page identifier @param recs log records -@param init page initialization, or nullptr if the page needs to be read */ +@param init_lsn page initialization, or 0 if the page needs to be read */ void buf_read_recover(fil_space_t *space, const page_id_t page_id, - page_recv_t &recs, recv_init *init); - -/** @name Modes used in read-ahead @{ */ -/** read only pages belonging to the insert buffer tree */ -#define BUF_READ_IBUF_PAGES_ONLY 131 -/** read any page */ -#define BUF_READ_ANY_PAGE 132 -/* @} */ - -#endif + page_recv_t &recs, lsn_t init_lsn); |