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/******************************************************
XtraBackup: hot backup tool for InnoDB
(c) 2009-2013 Percona LLC and/or its affiliates.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*******************************************************/
/* Source file cursor interface */
#ifndef FIL_CUR_H
#define FIL_CUR_H
#include <my_dir.h>
#include "read_filt.h"
#include "srv0start.h"
#include "srv0srv.h"
struct xb_fil_cur_t {
pfs_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; /*!< physical page size */
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 */
size_t buf_size; /*!< buffer size in bytes */
size_t buf_read; /*!< number of read bytes in buffer
after the last cursor read */
size_t 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 */
/** @return whether this is not a file-per-table tablespace */
bool is_system() const
{
ut_ad(space_id != SRV_TMP_SPACE_ID);
return(space_id == TRX_SYS_SPACE
|| srv_is_undo_tablespace(space_id));
}
};
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 */
ulonglong max_file_size = ULLONG_MAX);
/************************************************************************
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 */
/***********************************************************************
Extracts the relative path ("database/table.ibd") of a tablespace from a
specified possibly absolute path.
For user tablespaces both "./database/table.ibd" and
"/remote/dir/database/table.ibd" result in "database/table.ibd".
For system tablepsaces (i.e. When is_system is TRUE) both "/remote/dir/ibdata1"
and "./ibdata1" yield "ibdata1" in the output. */
const char *
xb_get_relative_path(
/*=================*/
const char* path, /*!< in: tablespace path (either
relative or absolute) */
ibool is_system); /*!< in: TRUE for system tablespaces,
i.e. when only the filename must be
returned. */
#endif
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