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/******************************************************
XtraBackup: hot backup tool for InnoDB
(c) 2009-2012 Percona Ireland Ltd.
Originally Created 3/3/2009 Yasufumi Kinoshita
Written by Alexey Kopytov, Aleksandr Kuzminsky, Stewart Smith, Vadim Tkachenko,
Yasufumi Kinoshita, Ignacio Nin and Baron Schwartz.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*******************************************************/
/* Source file cursor interface */
#ifndef FIL_CUR_H
#define FIL_CUR_H
#include <my_dir.h>
#include "innodb_int.h"
#include "read_filt.h"
struct xb_fil_cur_t {
os_file_t file; /*!< source file handle */
fil_node_t* node; /*!< source tablespace node */
char rel_path[FN_REFLEN];
/*!< normalized file path */
char abs_path[FN_REFLEN];
/*!< absolute file path */
MY_STAT statinfo; /*!< information about the file */
ulint zip_size; /*!< compressed page size in bytes or 0
for uncompressed pages */
ulint page_size; /*!< = zip_size for compressed pages or
UNIV_PAGE_SIZE for uncompressed ones */
ulint page_size_shift;/*!< bit shift corresponding to
page_size */
my_bool is_system; /*!< TRUE for system tablespace, FALSE
otherwise */
xb_read_filt_t* read_filter; /*!< read filter */
xb_read_filt_ctxt_t read_filter_ctxt;
/*!< read filter context */
byte* orig_buf; /*!< read buffer */
byte* buf; /*!< aligned pointer for orig_buf */
ulint buf_size; /*!< buffer size in bytes */
ulint buf_read; /*!< number of read bytes in buffer
after the last cursor read */
ulint buf_npages; /*!< number of pages in buffer after the
last cursor read */
ib_int64_t buf_offset; /*!< file offset of the first page in
buffer */
ulint buf_page_no; /*!< number of the first page in
buffer */
uint thread_n; /*!< thread number for diagnostics */
ulint space_id; /*!< ID of tablespace */
ulint space_size; /*!< space size in pages */
};
typedef enum {
XB_FIL_CUR_SUCCESS,
XB_FIL_CUR_SKIP,
XB_FIL_CUR_ERROR,
XB_FIL_CUR_EOF
} xb_fil_cur_result_t;
/************************************************************************
Open a source file cursor and initialize the associated read filter.
@return XB_FIL_CUR_SUCCESS on success, XB_FIL_CUR_SKIP if the source file must
be skipped and XB_FIL_CUR_ERROR on error. */
xb_fil_cur_result_t
xb_fil_cur_open(
/*============*/
xb_fil_cur_t* cursor, /*!< out: source file cursor */
xb_read_filt_t* read_filter, /*!< in/out: the read filter */
fil_node_t* node, /*!< in: source tablespace node */
uint thread_n); /*!< thread number for diagnostics */
/************************************************************************
Reads and verifies the next block of pages from the source
file. Positions the cursor after the last read non-corrupted page.
@return XB_FIL_CUR_SUCCESS if some have been read successfully, XB_FIL_CUR_EOF
if there are no more pages to read and XB_FIL_CUR_ERROR on error. */
xb_fil_cur_result_t
xb_fil_cur_read(
/*============*/
xb_fil_cur_t* cursor); /*!< in/out: source file cursor */
/************************************************************************
Close the source file cursor opened with xb_fil_cur_open() and its
associated read filter. */
void
xb_fil_cur_close(
/*=============*/
xb_fil_cur_t *cursor); /*!< in/out: source file cursor */
#endif
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