mirror of
https://github.com/postgres/postgres.git
synced 2025-07-30 11:03:19 +03:00
61081e75c6
Earlier versions of this tool were available (and still are) on github. Thanks to Michael Paquier, Alvaro Herrera, Peter Eisentraut, Amit Kapila, and Satoshi Nagayasu for review.
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* filemap.h
|
|
*
|
|
* Copyright (c) 2013-2015, PostgreSQL Global Development Group
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef FILEMAP_H
|
|
#define FILEMAP_H
|
|
|
|
#include "storage/relfilenode.h"
|
|
#include "storage/block.h"
|
|
|
|
#include "datapagemap.h"
|
|
|
|
/*
|
|
* For every file found in the local or remote system, we have a file entry
|
|
* which says what we are going to do with the file. For relation files,
|
|
* there is also a page map, marking pages in the file that were changed
|
|
* locally.
|
|
*
|
|
* The enum values are sorted in the order we want actions to be processed.
|
|
*/
|
|
typedef enum
|
|
{
|
|
FILE_ACTION_CREATE, /* create local directory or symbolic link */
|
|
FILE_ACTION_COPY, /* copy whole file, overwriting if exists */
|
|
FILE_ACTION_COPY_TAIL, /* copy tail from 'oldsize' to 'newsize' */
|
|
FILE_ACTION_NONE, /* no action (we might still copy modified blocks
|
|
* based on the parsed WAL) */
|
|
FILE_ACTION_TRUNCATE, /* truncate local file to 'newsize' bytes */
|
|
FILE_ACTION_REMOVE, /* remove local file / directory / symlink */
|
|
|
|
} file_action_t;
|
|
|
|
typedef enum
|
|
{
|
|
FILE_TYPE_REGULAR,
|
|
FILE_TYPE_DIRECTORY,
|
|
FILE_TYPE_SYMLINK
|
|
} file_type_t;
|
|
|
|
struct file_entry_t
|
|
{
|
|
char *path;
|
|
file_type_t type;
|
|
|
|
file_action_t action;
|
|
|
|
/* for a regular file */
|
|
size_t oldsize;
|
|
size_t newsize;
|
|
bool isrelfile; /* is it a relation data file? */
|
|
|
|
datapagemap_t pagemap;
|
|
|
|
/* for a symlink */
|
|
char *link_target;
|
|
|
|
struct file_entry_t *next;
|
|
};
|
|
|
|
typedef struct file_entry_t file_entry_t;
|
|
|
|
struct filemap_t
|
|
{
|
|
/*
|
|
* New entries are accumulated to a linked list, in process_remote_file
|
|
* and process_local_file.
|
|
*/
|
|
file_entry_t *first;
|
|
file_entry_t *last;
|
|
int nlist;
|
|
|
|
/*
|
|
* After processing all the remote files, the entries in the linked list
|
|
* are moved to this array. After processing local files, too, all the
|
|
* local entries are added to the array by filemap_finalize, and sorted
|
|
* in the final order. After filemap_finalize, all the entries are in
|
|
* the array, and the linked list is empty.
|
|
*/
|
|
file_entry_t **array;
|
|
int narray;
|
|
|
|
/*
|
|
* Summary information. total_size is the total size of the source cluster,
|
|
* and fetch_size is the number of bytes that needs to be copied.
|
|
*/
|
|
uint64 total_size;
|
|
uint64 fetch_size;
|
|
};
|
|
|
|
typedef struct filemap_t filemap_t;
|
|
|
|
extern filemap_t * filemap;
|
|
|
|
extern filemap_t *filemap_create(void);
|
|
|
|
extern void calculate_totals(void);
|
|
extern void print_filemap(void);
|
|
|
|
/* Functions for populating the filemap */
|
|
extern void process_remote_file(const char *path, file_type_t type, size_t newsize, const char *link_target);
|
|
extern void process_local_file(const char *path, file_type_t type, size_t newsize, const char *link_target);
|
|
extern void process_block_change(ForkNumber forknum, RelFileNode rnode, BlockNumber blkno);
|
|
extern void filemap_finalize(void);
|
|
|
|
#endif /* FILEMAP_H */
|