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7bcfa00a6a
This is a non-functional change. simplifying the code logic: - removing global variables ds_data and ds_meta - passing these variables as parameters to functions instead - adding helper classes: Datasink_free_list and Backup_datasinks - moving some function accepting a ds_ctxt parameter as methods to ds_ctxt.
134 lines
4 KiB
C
134 lines
4 KiB
C
/******************************************************
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Copyright (c) 2011-2013 Percona LLC and/or its affiliates.
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Data sink interface.
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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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#ifndef XB_DATASINK_H
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#define XB_DATASINK_H
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#include <my_global.h>
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#include <my_dir.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern char *xtrabackup_tmpdir;
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struct datasink_struct;
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typedef struct datasink_struct datasink_t;
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typedef struct ds_ctxt {
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datasink_t *datasink;
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char *root;
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void *ptr;
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struct ds_ctxt *pipe_ctxt;
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/*
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Copy file for backup/restore.
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@return true in case of success.
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*/
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bool copy_file(const char *src_file_path,
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const char *dst_file_path,
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uint thread_n);
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bool move_file(const char *src_file_path,
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const char *dst_file_path,
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const char *dst_dir,
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uint thread_n);
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bool make_hardlink(const char *from_path, const char *to_path);
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void copy_or_move_dir(const char *from, const char *to,
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bool do_copy, bool allow_hardlinks);
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bool backup_file_vprintf(const char *filename,
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const char *fmt, va_list ap);
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bool backup_file_print_buf(const char *filename,
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const char *buf,
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int buf_len);
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bool backup_file_printf(const char *filename,
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const char *fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 0);
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} ds_ctxt_t;
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typedef struct {
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void *ptr;
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char *path;
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datasink_t *datasink;
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} ds_file_t;
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struct datasink_struct {
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ds_ctxt_t *(*init)(const char *root);
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ds_file_t *(*open)(ds_ctxt_t *ctxt, const char *path, MY_STAT *stat);
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int (*write)(ds_file_t *file, const unsigned char *buf, size_t len);
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int (*close)(ds_file_t *file);
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int (*remove)(const char *path);
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void (*deinit)(ds_ctxt_t *ctxt);
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};
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static inline int dummy_remove(const char *) {
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return 0;
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}
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/* Supported datasink types */
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typedef enum {
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DS_TYPE_STDOUT,
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DS_TYPE_LOCAL,
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DS_TYPE_XBSTREAM,
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DS_TYPE_COMPRESS,
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DS_TYPE_ENCRYPT,
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DS_TYPE_DECRYPT,
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DS_TYPE_TMPFILE,
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DS_TYPE_BUFFER
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} ds_type_t;
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/************************************************************************
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Create a datasink of the specified type */
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ds_ctxt_t *ds_create(const char *root, ds_type_t type);
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/************************************************************************
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Open a datasink file */
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ds_file_t *ds_open(ds_ctxt_t *ctxt, const char *path, MY_STAT *stat);
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/************************************************************************
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Write to a datasink file.
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@return 0 on success, 1 on error. */
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int ds_write(ds_file_t *file, const void *buf, size_t len);
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/************************************************************************
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Close a datasink file.
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@return 0 on success, 1, on error. */
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int ds_close(ds_file_t *file);
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/************************************************************************
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Destroy a datasink handle */
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void ds_destroy(ds_ctxt_t *ctxt);
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/************************************************************************
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Set the destination pipe for a datasink (only makes sense for compress and
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tmpfile). */
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void ds_set_pipe(ds_ctxt_t *ctxt, ds_ctxt_t *pipe_ctxt);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* XB_DATASINK_H */
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