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129 lines
4.7 KiB
C
129 lines
4.7 KiB
C
/******************************************************
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XtraBackup: hot backup tool for InnoDB
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(c) 2009-2013 Percona LLC and/or its affiliates.
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Originally Created 3/3/2009 Yasufumi Kinoshita
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Written by Alexey Kopytov, Aleksandr Kuzminsky, Stewart Smith, Vadim Tkachenko,
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Yasufumi Kinoshita, Ignacio Nin and Baron Schwartz.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
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*******************************************************/
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/* Source file cursor interface */
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#ifndef FIL_CUR_H
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#define FIL_CUR_H
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#include <my_dir.h>
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#include "read_filt.h"
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#include "mtr0types.h"
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#include "srv0start.h"
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#include "srv0srv.h"
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#include "xtrabackup.h"
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struct xb_fil_cur_t {
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pfs_os_file_t file; /*!< source file handle */
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fil_node_t* node; /*!< source tablespace node */
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char rel_path[FN_REFLEN];
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/*!< normalized file path */
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char abs_path[FN_REFLEN];
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/*!< absolute file path */
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MY_STAT statinfo; /*!< information about the file */
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ulint zip_size; /*!< compressed page size in bytes or 0
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for uncompressed pages */
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ulint page_size; /*!< physical page size */
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xb_read_filt_t* read_filter; /*!< read filter */
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xb_read_filt_ctxt_t read_filter_ctxt;
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/*!< read filter context */
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byte* buf; /*!< read buffer */
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size_t buf_size; /*!< buffer size in bytes */
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size_t buf_read; /*!< number of read bytes in buffer
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after the last cursor read */
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size_t buf_npages; /*!< number of pages in buffer after the
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last cursor read */
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ib_int64_t buf_offset; /*!< file offset of the first page in
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buffer */
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unsigned buf_page_no; /*!< number of the first page in
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buffer */
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uint thread_n; /*!< thread number for diagnostics */
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uint32_t space_id; /*!< ID of tablespace */
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uint32_t space_size; /*!< space size in pages */
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uint32_t n_process_batch;/*!< Number of batch processed */
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/** @return whether this is not a file-per-table tablespace */
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bool is_system() const
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{
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ut_ad(space_id != SRV_TMP_SPACE_ID);
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return(space_id == TRX_SYS_SPACE
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|| srv_is_undo_tablespace(space_id));
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}
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};
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typedef enum {
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XB_FIL_CUR_SUCCESS,
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XB_FIL_CUR_SKIP,
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XB_FIL_CUR_ERROR,
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XB_FIL_CUR_EOF
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} xb_fil_cur_result_t;
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/************************************************************************
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Open a source file cursor and initialize the associated read filter.
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@return XB_FIL_CUR_SUCCESS on success, XB_FIL_CUR_SKIP if the source file must
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be skipped and XB_FIL_CUR_ERROR on error. */
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xb_fil_cur_result_t
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xb_fil_cur_open(
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/*============*/
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xb_fil_cur_t* cursor, /*!< out: source file cursor */
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xb_read_filt_t* read_filter, /*!< in/out: the read filter */
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fil_node_t* node, /*!< in: source tablespace node */
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uint thread_n, /*!< thread number for diagnostics */
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ulonglong max_file_size = ULLONG_MAX);
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/** Reads and verifies the next block of pages from the source
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file. Positions the cursor after the last read non-corrupted page.
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@param[in,out] cursor source file cursor
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@param[out] corrupted_pages adds corrupted pages if
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opt_log_innodb_page_corruption is set
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@return XB_FIL_CUR_SUCCESS if some have been read successfully, XB_FIL_CUR_EOF
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if there are no more pages to read and XB_FIL_CUR_ERROR on error. */
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xb_fil_cur_result_t xb_fil_cur_read(xb_fil_cur_t *cursor,
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CorruptedPages &corrupted_pages);
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/************************************************************************
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Close the source file cursor opened with xb_fil_cur_open() and its
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associated read filter. */
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void
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xb_fil_cur_close(
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/*=============*/
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xb_fil_cur_t *cursor); /*!< in/out: source file cursor */
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/***********************************************************************
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Extracts the relative path ("database/table.ibd") of a tablespace from a
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specified possibly absolute path.
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For user tablespaces both "./database/table.ibd" and
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"/remote/dir/database/table.ibd" result in "database/table.ibd".
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For system tablepsaces (i.e. When is_system is TRUE) both "/remote/dir/ibdata1"
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and "./ibdata1" yield "ibdata1" in the output. */
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const char *
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xb_get_relative_path(
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/*=================*/
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const char* path, /*!< in: tablespace path (either
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relative or absolute) */
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ibool is_system); /*!< in: TRUE for system tablespaces,
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i.e. when only the filename must be
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returned. */
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#endif
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