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pg_probackup.h
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/*-------------------------------------------------------------------------
*
* pg_probackup.h: Backup/Recovery manager for PostgreSQL.
*
* Portions Copyright (c) 2009-2013, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
* Portions Copyright (c) 2015-2022, Postgres Professional
*
*-------------------------------------------------------------------------
*/
#ifndef PG_PROBACKUP_H
#define PG_PROBACKUP_H
#include "postgres_fe.h"
#include "libpq-fe.h"
#include "access/xlog_internal.h"
#include "utils/pg_crc.h"
#include "catalog/pg_control.h"
#if PG_VERSION_NUM >= 120000
#include "common/logging.h"
#endif
#ifdef FRONTEND
#undef FRONTEND
#include <port/atomics.h>
#define FRONTEND
#else
#include <port/atomics.h>
#endif
#include "utils/configuration.h"
#include "utils/logger.h"
#include "utils/remote.h"
#include "utils/parray.h"
#include "utils/pgut.h"
#include "utils/file.h"
#include "datapagemap.h"
#include "utils/thread.h"
#include "pg_probackup_state.h"
#ifdef WIN32
#define __thread __declspec(thread)
#else
#include <pthread.h>
#endif
/* Wrap the code that we're going to delete after refactoring in this define*/
#define REFACTORE_ME
/* pgut client variables and full path */
extern const char *PROGRAM_NAME;
extern const char *PROGRAM_NAME_FULL;
extern const char *PROGRAM_FULL_PATH;
extern const char *PROGRAM_URL;
extern const char *PROGRAM_EMAIL;
/* Directory/File names */
#define DATABASE_DIR "database"
#define BACKUPS_DIR "backups"
#define WAL_SUBDIR "wal"
#if PG_VERSION_NUM >= 100000
#define PG_XLOG_DIR "pg_wal"
#define PG_LOG_DIR "log"
#else
#define PG_XLOG_DIR "pg_xlog"
#define PG_LOG_DIR "pg_log"
#endif
#define PG_TBLSPC_DIR "pg_tblspc"
#define PG_GLOBAL_DIR "global"
#define BACKUP_CONTROL_FILE "backup.control"
#define BACKUP_CATALOG_CONF_FILE "pg_probackup.conf"
#define BACKUP_LOCK_FILE "backup.pid"
#define BACKUP_RO_LOCK_FILE "backup_ro.pid"
#define DATABASE_FILE_LIST "backup_content.control"
#define PG_BACKUP_LABEL_FILE "backup_label"
#define PG_TABLESPACE_MAP_FILE "tablespace_map"
#define RELMAPPER_FILENAME "pg_filenode.map"
#define EXTERNAL_DIR "external_directories/externaldir"
#define DATABASE_MAP "database_map"
#define HEADER_MAP "page_header_map"
#define HEADER_MAP_TMP "page_header_map_tmp"
/* default replication slot names */
#define DEFAULT_TEMP_SLOT_NAME "pg_probackup_slot";
#define DEFAULT_PERMANENT_SLOT_NAME "pg_probackup_perm_slot";
/* Timeout defaults */
#define ARCHIVE_TIMEOUT_DEFAULT 300
#define REPLICA_TIMEOUT_DEFAULT 300
#define LOCK_TIMEOUT 60
#define LOCK_STALE_TIMEOUT 30
#define LOG_FREQ 10
/* Directory/File permission */
#define DIR_PERMISSION (0700)
#define FILE_PERMISSION (0600)
/* 64-bit xid support for PGPRO_EE */
#ifndef PGPRO_EE
#define XID_FMT "%u"
#endif
#ifndef STDIN_FILENO
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#endif
/* stdio buffer size */
#define STDIO_BUFSIZE 65536
#define ERRMSG_MAX_LEN 2048
#define CHUNK_SIZE (128 * 1024)
#define LARGE_CHUNK_SIZE (4 * 1024 * 1024)
#define OUT_BUF_SIZE (512 * 1024)
/* retry attempts */
#define PAGE_READ_ATTEMPTS 300
/* max size of note, that can be added to backup */
#define MAX_NOTE_SIZE 1024
/* Check if an XLogRecPtr value is pointed to 0 offset */
#define XRecOffIsNull(xlrp) \
((xlrp) % XLOG_BLCKSZ == 0)
/* Text Coloring macro */
#define TC_LEN 11
#define TC_RED "\033[0;31m"
#define TC_RED_BOLD "\033[1;31m"
#define TC_BLUE "\033[0;34m"
#define TC_BLUE_BOLD "\033[1;34m"
#define TC_GREEN "\033[0;32m"
#define TC_GREEN_BOLD "\033[1;32m"
#define TC_YELLOW "\033[0;33m"
#define TC_YELLOW_BOLD "\033[1;33m"
#define TC_MAGENTA "\033[0;35m"
#define TC_MAGENTA_BOLD "\033[1;35m"
#define TC_CYAN "\033[0;36m"
#define TC_CYAN_BOLD "\033[1;36m"
#define TC_RESET "\033[0m"
typedef struct RedoParams
{
TimeLineID tli;
XLogRecPtr lsn;
uint32 checksum_version;
} RedoParams;
typedef struct PageState
{
uint16 checksum;
XLogRecPtr lsn;
} PageState;
typedef struct db_map_entry
{
Oid dbOid;
char *datname;
} db_map_entry;
/* State of pgdata in the context of its compatibility for incremental restore */
typedef enum DestDirIncrCompatibility
{
POSTMASTER_IS_RUNNING,
SYSTEM_ID_MISMATCH,
BACKUP_LABEL_EXISTS,
DEST_IS_NOT_OK,
DEST_OK
} DestDirIncrCompatibility;
typedef enum IncrRestoreMode
{
INCR_NONE,
INCR_CHECKSUM,
INCR_LSN
} IncrRestoreMode;
typedef enum PartialRestoreType
{
NONE,
INCLUDE,
EXCLUDE,
} PartialRestoreType;
typedef enum RecoverySettingsMode
{
DEFAULT, /* not set */
DONTWRITE, /* explicitly forbid to update recovery settings */
//TODO Should we always clean/preserve old recovery settings,
// or make it configurable?
PITR_REQUESTED, /* can be set based on other parameters
* if not explicitly forbidden */
} RecoverySettingsMode;
typedef enum CompressAlg
{
NOT_DEFINED_COMPRESS = 0,
NONE_COMPRESS,
PGLZ_COMPRESS,
ZLIB_COMPRESS,
} CompressAlg;
typedef enum ForkName
{
vm,
fsm,
cfm,
init,
ptrack
} ForkName;
#define INIT_FILE_CRC32(use_crc32c, crc) \
do { \
if (use_crc32c) \
INIT_CRC32C(crc); \
else \
INIT_TRADITIONAL_CRC32(crc); \
} while (0)
#define COMP_FILE_CRC32(use_crc32c, crc, data, len) \
do { \
if (use_crc32c) \
COMP_CRC32C((crc), (data), (len)); \
else \
COMP_TRADITIONAL_CRC32(crc, data, len); \
} while (0)
#define FIN_FILE_CRC32(use_crc32c, crc) \
do { \
if (use_crc32c) \
FIN_CRC32C(crc); \
else \
FIN_TRADITIONAL_CRC32(crc); \
} while (0)
#define pg_off_t unsigned long long
/* Information about single file (or dir) in backup */
typedef struct pgFile
{
char *name; /* file or directory name */
mode_t mode; /* protection (file type and permission) */
size_t size; /* size of the file */
time_t mtime; /* file st_mtime attribute, can be used only
during backup */
size_t read_size; /* size of the portion read (if only some pages are
backed up, it's different from size) */
int64 write_size; /* size of the backed-up file. BYTES_INVALID means
that the file existed but was not backed up
because not modified since last backup. */
size_t uncompressed_size; /* size of the backed-up file before compression
* and adding block headers.
*/
/* we need int64 here to store '-1' value */
pg_crc32 crc; /* CRC value of the file, regular file only */
char *rel_path; /* relative path of the file */
char *linked; /* path of the linked file */
bool is_datafile; /* true if the file is PostgreSQL data file */
Oid tblspcOid; /* tblspcOid extracted from path, if applicable */
Oid dbOid; /* dbOid extracted from path, if applicable */
Oid relOid; /* relOid extracted from path, if applicable */
ForkName forkName; /* forkName extracted from path, if applicable */
int segno; /* Segment number for ptrack */
int n_blocks; /* number of blocks in the data file in data directory */
bool is_cfs; /* Flag to distinguish files compressed by CFS*/
int external_dir_num; /* Number of external directory. 0 if not external */
bool exists_in_prev; /* Mark files, both data and regular, that exists in previous backup */
CompressAlg compress_alg; /* compression algorithm applied to the file */
volatile pg_atomic_flag lock;/* lock for synchronization of parallel threads */
datapagemap_t pagemap; /* bitmap of pages updated since previous backup
may take up to 16kB per file */
bool pagemap_isabsent; /* Used to mark files with unknown state of pagemap,
* i.e. datafiles without _ptrack */
/* Coordinates in header map */
int n_headers; /* number of blocks in the data file in backup */
pg_crc32 hdr_crc; /* CRC value of header file: name_hdr */
pg_off_t hdr_off; /* offset in header map */
int hdr_size; /* length of headers */
bool excluded; /* excluded via --exclude-path option */
} pgFile;
typedef struct page_map_entry
{
const char *path; /* file or directory name */
char *pagemap;
size_t pagemapsize;
} page_map_entry;
/* Special values of datapagemap_t bitmapsize */
#define PageBitmapIsEmpty 0 /* Used to mark unchanged datafiles */
/* Return codes for check_tablespace_mapping */
#define NoTblspc 0
#define EmptyTblspc 1
#define NotEmptyTblspc 2
/* Current state of backup */
typedef enum BackupStatus
{
BACKUP_STATUS_INVALID, /* the pgBackup is invalid */
BACKUP_STATUS_OK, /* completed backup */
BACKUP_STATUS_ERROR, /* aborted because of unexpected error */
BACKUP_STATUS_RUNNING, /* running backup */
BACKUP_STATUS_MERGING, /* merging backups */
BACKUP_STATUS_MERGED, /* backup has been successfully merged and now awaits
* the assignment of new start_time */
BACKUP_STATUS_DELETING, /* data files are being deleted */
BACKUP_STATUS_DELETED, /* data files have been deleted */
BACKUP_STATUS_DONE, /* completed but not validated yet */
BACKUP_STATUS_ORPHAN, /* backup validity is unknown but at least one parent backup is corrupted */
BACKUP_STATUS_CORRUPT /* files are corrupted, not available */
} BackupStatus;
typedef enum BackupMode
{
BACKUP_MODE_INVALID = 0,
BACKUP_MODE_DIFF_PAGE, /* incremental page backup */
BACKUP_MODE_DIFF_PTRACK, /* incremental page backup with ptrack system */
BACKUP_MODE_DIFF_DELTA, /* incremental page backup with lsn comparison */
BACKUP_MODE_FULL /* full backup */
} BackupMode;
typedef enum ShowFormat
{
SHOW_PLAIN,
SHOW_JSON
} ShowFormat;
/* special values of pgBackup fields */
#define INVALID_BACKUP_ID 0 /* backup ID is not provided by user */
#define BYTES_INVALID (-1) /* file didn`t changed since previous backup, DELTA backup do not rely on it */
#define FILE_NOT_FOUND (-2) /* file disappeared during backup */
#define BLOCKNUM_INVALID (-1)
#define PROGRAM_VERSION "2.5.6"
/* update when remote agent API or behaviour changes */
#define AGENT_PROTOCOL_VERSION 20501
#define AGENT_PROTOCOL_VERSION_STR "2.5.1"
/* update only when changing storage format */
#define STORAGE_FORMAT_VERSION "2.4.4"
typedef struct ConnectionOptions
{
const char *pgdatabase;
const char *pghost;
const char *pgport;
const char *pguser;
} ConnectionOptions;
typedef struct ConnectionArgs
{
PGconn *conn;
PGcancel *cancel_conn;
} ConnectionArgs;
/* Store values for --remote-* option for 'restore_command' constructor */
typedef struct ArchiveOptions
{
const char *host;
const char *port;
const char *user;
} ArchiveOptions;
/*
* An instance configuration. It can be stored in a configuration file or passed
* from command line.
*/
typedef struct InstanceConfig
{
uint64 system_identifier;
uint32 xlog_seg_size;
char *pgdata;
char *external_dir_str;
ConnectionOptions conn_opt;
ConnectionOptions master_conn_opt;
uint32 replica_timeout; //Deprecated. Not used anywhere
/* Wait timeout for WAL segment archiving */
uint32 archive_timeout;
/* cmdline to be used as restore_command */
char *restore_command;
/* Logger parameters */
LoggerConfig logger;
/* Remote access parameters */
RemoteConfig remote;
/* Retention options. 0 disables the option. */
uint32 retention_redundancy;
uint32 retention_window;
uint32 wal_depth;
CompressAlg compress_alg;
int compress_level;
/* Archive description */
ArchiveOptions archive;
} InstanceConfig;
extern ConfigOption instance_options[];
extern InstanceConfig instance_config;
extern time_t current_time;
typedef struct PGNodeInfo
{
uint32 block_size;
uint32 wal_block_size;
uint32 checksum_version;
bool is_superuser;
bool pgpro_support;
int server_version;
char server_version_str[100];
int ptrack_version_num;
bool is_ptrack_enabled;
const char *ptrack_schema; /* used only for ptrack 2.x */
} PGNodeInfo;
/* structure used for access to block header map */
typedef struct HeaderMap
{
char path[MAXPGPATH];
char path_tmp[MAXPGPATH]; /* used only in merge */
FILE *fp; /* used only for writing */
char *buf; /* buffer */
pg_off_t offset; /* current position in fp */
pthread_mutex_t mutex;
} HeaderMap;
typedef struct pgBackup pgBackup;
/* Information about single backup stored in backup.conf */
struct pgBackup
{
BackupMode backup_mode; /* Mode - one of BACKUP_MODE_xxx above*/
time_t backup_id; /* Identifier of the backup.
* Currently it's the same as start_time */
BackupStatus status; /* Status - one of BACKUP_STATUS_xxx above*/
TimeLineID tli; /* timeline of start and stop backup lsns */
XLogRecPtr start_lsn; /* backup's starting transaction log location */
XLogRecPtr stop_lsn; /* backup's finishing transaction log location */
time_t start_time; /* UTC time of backup creation */
time_t merge_dest_backup; /* start_time of incremental backup with
* which this backup is merging with.
* Only available for FULL backups
* with MERGING or MERGED statuses */
time_t merge_time; /* the moment when merge was started or 0 */
time_t end_time; /* the moment when backup was finished, or the moment
* when we realized that backup is broken */
time_t recovery_time; /* Earliest moment for which you can restore
* the state of the database cluster using
* this backup */
time_t expire_time; /* Backup expiration date */
TransactionId recovery_xid; /* Earliest xid for which you can restore
* the state of the database cluster using
* this backup */
/*
* Amount of raw data. For a full backup, this is the total amount of
* data while for a differential backup this is just the difference
* of data taken.
* BYTES_INVALID means nothing was backed up.
*/
int64 data_bytes;
/* Size of WAL files needed to replay on top of this
* backup to reach the consistency.
*/
int64 wal_bytes;
/* Size of data files before applying compression and block header,
* WAL files are not included.
*/
int64 uncompressed_bytes;
/* Size of data files in PGDATA at the moment of backup. */
int64 pgdata_bytes;
CompressAlg compress_alg;
int compress_level;
/* Fields needed for compatibility check */
uint32 block_size;
uint32 wal_block_size;
uint32 checksum_version;
char program_version[100];
char server_version[100];
bool stream; /* Was this backup taken in stream mode?
* i.e. does it include all needed WAL files? */
bool from_replica; /* Was this backup taken from replica */
time_t parent_backup; /* Identifier of the previous backup.
* Which is basic backup for this
* incremental backup. */
pgBackup *parent_backup_link;
char *primary_conninfo; /* Connection parameters of the backup
* in the format suitable for recovery.conf */
char *external_dir_str; /* List of external directories,
* separated by ':' */
char *root_dir; /* Full path for root backup directory:
backup_path/instance_name/backup_id */
char *database_dir; /* Full path to directory with data files:
backup_path/instance_name/backup_id/database */
parray *files; /* list of files belonging to this backup
* must be populated explicitly */
char *note;
pg_crc32 content_crc;
/* map used for access to page headers */
HeaderMap hdr_map;
};
/* Recovery target for restore and validate subcommands */
typedef struct pgRecoveryTarget
{
time_t target_time;
/* add one more field in order to avoid deparsing target_time back */
const char *time_string;
TransactionId target_xid;
/* add one more field in order to avoid deparsing target_xid back */
const char *xid_string;
XLogRecPtr target_lsn;
/* add one more field in order to avoid deparsing target_lsn back */
const char *lsn_string;
TimeLineID target_tli;
bool target_inclusive;
bool inclusive_specified;
const char *target_stop;
const char *target_name;
const char *target_action;
} pgRecoveryTarget;
/* Options needed for restore and validate commands */
typedef struct pgRestoreParams
{
bool force;
bool is_restore;
bool no_validate;
bool restore_as_replica;
//TODO maybe somehow add restore_as_replica as one of RecoverySettingsModes
RecoverySettingsMode recovery_settings_mode;
bool skip_external_dirs;
bool skip_block_validation; //Start using it
const char *restore_command;
const char *primary_slot_name;
const char *primary_conninfo;
/* options for incremental restore */
IncrRestoreMode incremental_mode;
XLogRecPtr shift_lsn;
/* options for partial restore */
PartialRestoreType partial_restore_type;
parray *partial_db_list;
char* waldir;
} pgRestoreParams;
/* Options needed for set-backup command */
typedef struct pgSetBackupParams
{
int64 ttl; /* amount of time backup must be pinned
* -1 - do nothing
* 0 - disable pinning
*/
time_t expire_time; /* Point in time until backup
* must be pinned.
*/
char *note;
} pgSetBackupParams;
typedef struct
{
PGNodeInfo *nodeInfo;
const char *from_root;
const char *to_root;
const char *external_prefix;
parray *files_list;
parray *prev_filelist;
parray *external_dirs;
XLogRecPtr prev_start_lsn;
int thread_num;
HeaderMap *hdr_map;
/*
* Return value from the thread.
* 0 means there is no error, 1 - there is an error.
*/
int ret;
} backup_files_arg;
typedef struct timelineInfo timelineInfo;
/* struct to collect info about timelines in WAL archive */
struct timelineInfo {
TimeLineID tli; /* this timeline */
TimeLineID parent_tli; /* parent timeline. 0 if none */
timelineInfo *parent_link; /* link to parent timeline */
XLogRecPtr switchpoint; /* if this timeline has a parent, then
* switchpoint contains switchpoint LSN,
* otherwise 0 */
XLogSegNo begin_segno; /* first present segment in this timeline */
XLogSegNo end_segno; /* last present segment in this timeline */
size_t n_xlog_files; /* number of segments (only really existing)
* does not include lost segments */
size_t size; /* space on disk taken by regular WAL files */
parray *backups; /* array of pgBackup sturctures with info
* about backups belonging to this timeline */
parray *xlog_filelist; /* array of ordinary WAL segments, '.partial'
* and '.backup' files belonging to this timeline */
parray *lost_segments; /* array of intervals of lost segments */
parray *keep_segments; /* array of intervals of segments used by WAL retention */
pgBackup *closest_backup; /* link to valid backup, closest to timeline */
pgBackup *oldest_backup; /* link to oldest backup on timeline */
XLogRecPtr anchor_lsn; /* LSN belonging to the oldest segno to keep for 'wal-depth' */
TimeLineID anchor_tli; /* timeline of anchor_lsn */
};
typedef struct xlogInterval
{
XLogSegNo begin_segno;
XLogSegNo end_segno;
} xlogInterval;
typedef struct lsnInterval
{
TimeLineID tli;
XLogRecPtr begin_lsn;
XLogRecPtr end_lsn;
} lsnInterval;
typedef enum xlogFileType
{
SEGMENT,
TEMP_SEGMENT,
PARTIAL_SEGMENT,
BACKUP_HISTORY_FILE
} xlogFileType;
typedef struct xlogFile
{
pgFile file;
XLogSegNo segno;
xlogFileType type;
bool keep; /* Used to prevent removal of WAL segments
* required by ARCHIVE backups. */
} xlogFile;
/*
* When copying datafiles to backup we validate and compress them block
* by block. Thus special header is required for each data block.
*/
typedef struct BackupPageHeader
{
BlockNumber block; /* block number */
int32 compressed_size;
} BackupPageHeader;
/* 4MB for 1GB file */
typedef struct BackupPageHeader2
{
XLogRecPtr lsn;
int32 block; /* block number */
int32 pos; /* position in backup file */
uint16 checksum;
} BackupPageHeader2;
typedef struct StopBackupCallbackParams
{
PGconn *conn;
int server_version;
} StopBackupCallbackParams;
/* Special value for compressed_size field */
#define PageIsOk 0
#define SkipCurrentPage -1
#define PageIsTruncated -2
#define PageIsCorrupted -3 /* used by checkdb */
/*
* Return timeline, xlog ID and record offset from an LSN of the type
* 0/B000188, usual result from pg_stop_backup() and friends.
*/
#define XLogDataFromLSN(data, xlogid, xrecoff) \
sscanf(data, "%X/%X", xlogid, xrecoff)
#define IsCompressedXLogFileName(fname) \
(strlen(fname) == XLOG_FNAME_LEN + strlen(".gz") && \
strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \
strcmp((fname) + XLOG_FNAME_LEN, ".gz") == 0)
#if PG_VERSION_NUM >= 110000
#define WalSegmentOffset(xlogptr, wal_segsz_bytes) \
XLogSegmentOffset(xlogptr, wal_segsz_bytes)
#define GetXLogSegNo(xlrp, logSegNo, wal_segsz_bytes) \
XLByteToSeg(xlrp, logSegNo, wal_segsz_bytes)
#define GetXLogRecPtr(segno, offset, wal_segsz_bytes, dest) \
XLogSegNoOffsetToRecPtr(segno, offset, wal_segsz_bytes, dest)
#define GetXLogFileName(fname, tli, logSegNo, wal_segsz_bytes) \
XLogFileName(fname, tli, logSegNo, wal_segsz_bytes)
#define IsInXLogSeg(xlrp, logSegNo, wal_segsz_bytes) \
XLByteInSeg(xlrp, logSegNo, wal_segsz_bytes)
#define GetXLogSegName(fname, logSegNo, wal_segsz_bytes) \
snprintf(fname, 20, "%08X%08X", \
(uint32) ((logSegNo) / XLogSegmentsPerXLogId(wal_segsz_bytes)), \
(uint32) ((logSegNo) % XLogSegmentsPerXLogId(wal_segsz_bytes)))
#define GetXLogSegNoFromScrath(logSegNo, log, seg, wal_segsz_bytes) \
logSegNo = (uint64) log * XLogSegmentsPerXLogId(wal_segsz_bytes) + seg
#define GetXLogFromFileName(fname, tli, logSegNo, wal_segsz_bytes) \
XLogFromFileName(fname, tli, logSegNo, wal_segsz_bytes)
#else
#define WalSegmentOffset(xlogptr, wal_segsz_bytes) \
((xlogptr) & ((XLogSegSize) - 1))
#define GetXLogSegNo(xlrp, logSegNo, wal_segsz_bytes) \
XLByteToSeg(xlrp, logSegNo)
#define GetXLogRecPtr(segno, offset, wal_segsz_bytes, dest) \
XLogSegNoOffsetToRecPtr(segno, offset, dest)
#define GetXLogFileName(fname, tli, logSegNo, wal_segsz_bytes) \
XLogFileName(fname, tli, logSegNo)
#define IsInXLogSeg(xlrp, logSegNo, wal_segsz_bytes) \
XLByteInSeg(xlrp, logSegNo)
#define GetXLogSegName(fname, logSegNo, wal_segsz_bytes) \
snprintf(fname, 20, "%08X%08X",\
(uint32) ((logSegNo) / XLogSegmentsPerXLogId), \
(uint32) ((logSegNo) % XLogSegmentsPerXLogId))
#define GetXLogSegNoFromScrath(logSegNo, log, seg, wal_segsz_bytes) \
logSegNo = (uint64) log * XLogSegmentsPerXLogId + seg
#define GetXLogFromFileName(fname, tli, logSegNo, wal_segsz_bytes) \
XLogFromFileName(fname, tli, logSegNo)
#endif
#define IsPartialCompressXLogFileName(fname) \
(strlen(fname) == XLOG_FNAME_LEN + strlen(".gz.partial") && \
strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \
strcmp((fname) + XLOG_FNAME_LEN, ".gz.partial") == 0)
#define IsTempXLogFileName(fname) \
(strlen(fname) == XLOG_FNAME_LEN + strlen(".part") && \
strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \
strcmp((fname) + XLOG_FNAME_LEN, ".part") == 0)
#define IsTempCompressXLogFileName(fname) \
(strlen(fname) == XLOG_FNAME_LEN + strlen(".gz.part") && \
strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \
strcmp((fname) + XLOG_FNAME_LEN, ".gz.part") == 0)
#define IsSshProtocol() (instance_config.remote.host && strcmp(instance_config.remote.proto, "ssh") == 0)
/* common options */
extern pid_t my_pid;
extern __thread int my_thread_num;
extern int num_threads;
extern bool stream_wal;
extern bool show_color;
extern bool progress;
extern bool is_archive_cmd; /* true for archive-{get,push} */
/* In pre-10 'replication_slot' is defined in receivelog.h */
extern char *replication_slot;
#if PG_VERSION_NUM >= 100000
extern bool temp_slot;
#endif
extern bool perm_slot;
/* backup options */
extern bool smooth_checkpoint;
/* remote probackup options */
extern char* remote_agent;
extern bool exclusive_backup;
/* delete options */
extern bool delete_wal;
extern bool delete_expired;
extern bool merge_expired;
extern bool dry_run;
/* ===== instanceState ===== */
typedef struct InstanceState
{
/* catalog, this instance belongs to */
CatalogState *catalog_state;
char instance_name[MAXPGPATH]; //previously global var instance_name
/* $BACKUP_PATH/backups/instance_name */
char instance_backup_subdir_path[MAXPGPATH];
/* $BACKUP_PATH/backups/instance_name/BACKUP_CATALOG_CONF_FILE */
char instance_config_path[MAXPGPATH];
/* $BACKUP_PATH/backups/instance_name */
char instance_wal_subdir_path[MAXPGPATH]; // previously global var arclog_path
/* TODO: Make it more specific */
PGconn *conn;
//TODO split into some more meaningdul parts
InstanceConfig *config;
} InstanceState;
/* ===== instanceState (END) ===== */
/* show options */
extern ShowFormat show_format;
/* checkdb options */
extern bool heapallindexed;
extern bool checkunique;
extern bool skip_block_validation;
/* current settings */
extern pgBackup current;
/* argv of the process */
extern char** commands_args;
/* in backup.c */
extern int do_backup(InstanceState *instanceState, pgSetBackupParams *set_backup_params,
bool no_validate, bool no_sync, bool backup_logs, time_t start_time);
extern void do_checkdb(bool need_amcheck, ConnectionOptions conn_opt,
char *pgdata);
extern BackupMode parse_backup_mode(const char *value);
extern const char *deparse_backup_mode(BackupMode mode);
extern void process_block_change(ForkNumber forknum, RelFileNode rnode,
BlockNumber blkno);
/* in catchup.c */
extern int do_catchup(const char *source_pgdata, const char *dest_pgdata, int num_threads, bool sync_dest_files,
parray *exclude_absolute_paths_list, parray *exclude_relative_paths_list);
/* in restore.c */
extern int do_restore_or_validate(InstanceState *instanceState,
time_t target_backup_id,
pgRecoveryTarget *rt,
pgRestoreParams *params,
bool no_sync);
extern bool satisfy_timeline(const parray *timelines, TimeLineID tli, XLogRecPtr lsn);
extern bool satisfy_recovery_target(const pgBackup *backup,
const pgRecoveryTarget *rt);
extern pgRecoveryTarget *parseRecoveryTargetOptions(
const char *target_time, const char *target_xid,
const char *target_inclusive, TimeLineID target_tli, const char* target_lsn,
const char *target_stop, const char *target_name,
const char *target_action);
extern parray *get_dbOid_exclude_list(pgBackup *backup, parray *datname_list,
PartialRestoreType partial_restore_type);
extern parray *get_backup_filelist(pgBackup *backup, bool strict);
extern parray *read_timeline_history(const char *arclog_path, TimeLineID targetTLI, bool strict);
extern bool tliIsPartOfHistory(const parray *timelines, TimeLineID tli);
extern DestDirIncrCompatibility check_incremental_compatibility(const char *pgdata, uint64 system_identifier,
IncrRestoreMode incremental_mode);
/* in merge.c */
extern void do_merge(InstanceState *instanceState, time_t backup_id, bool no_validate, bool no_sync);
extern void merge_backups(pgBackup *backup, pgBackup *next_backup);
extern void merge_chain(InstanceState *instanceState, parray *parent_chain,
pgBackup *full_backup, pgBackup *dest_backup,
bool no_validate, bool no_sync);
extern parray *read_database_map(pgBackup *backup);
/* in init.c */
extern int do_init(CatalogState *catalogState);
extern int do_add_instance(InstanceState *instanceState, InstanceConfig *instance);
/* in archive.c */
extern void do_archive_push(InstanceState *instanceState, InstanceConfig *instance, char *pg_xlog_dir,
char *wal_file_name, int batch_size, bool overwrite,
bool no_sync, bool no_ready_rename);
extern void do_archive_get(InstanceState *instanceState, InstanceConfig *instance, const char *prefetch_dir_arg, char *wal_file_path,
char *wal_file_name, int batch_size, bool validate_wal);
/* in configure.c */
extern void do_show_config(void);
extern void do_set_config(InstanceState *instanceState, bool missing_ok);
extern void init_config(InstanceConfig *config, const char *instance_name);
extern InstanceConfig *readInstanceConfigFile(InstanceState *instanceState);
/* in show.c */
extern int do_show(CatalogState *catalogState, InstanceState *instanceState,
time_t requested_backup_id, bool show_archive);
extern void memorize_environment_locale(void);
extern void free_environment_locale(void);
/* in delete.c */
extern void do_delete(InstanceState *instanceState, time_t backup_id);
extern void delete_backup_files(pgBackup *backup);
extern void do_retention(InstanceState *instanceState, bool no_validate, bool no_sync);
extern int do_delete_instance(InstanceState *instanceState);
extern void do_delete_status(InstanceState *instanceState,
InstanceConfig *instance_config, const char *status);
/* in fetch.c */
extern char *slurpFile(const char *datadir,
const char *path,
size_t *filesize,
bool safe,
fio_location location);
extern char *fetchFile(PGconn *conn, const char *filename, size_t *filesize);
/* in help.c */
extern void help_print_version(void);
extern void help_pg_probackup(void);
extern void help_command(ProbackupSubcmd const subcmd);
/* in validate.c */
extern void pgBackupValidate(pgBackup* backup, pgRestoreParams *params);
extern int do_validate_all(CatalogState *catalogState, InstanceState *instanceState);
extern int validate_one_page(Page page, BlockNumber absolute_blkno,
XLogRecPtr stop_lsn, PageState *page_st,
uint32 checksum_version);
extern bool validate_tablespace_map(pgBackup *backup, bool no_validate);
extern parray* get_history_streaming(ConnectionOptions *conn_opt, TimeLineID tli, parray *backup_list);
/* return codes for validate_one_page */
/* TODO: use enum */
#define PAGE_IS_VALID (-1)
#define PAGE_IS_NOT_FOUND (-2)
#define PAGE_IS_ZEROED (-3)
#define PAGE_HEADER_IS_INVALID (-4)
#define PAGE_CHECKSUM_MISMATCH (-5)
#define PAGE_LSN_FROM_FUTURE (-6)
/* in catalog.c */
extern pgBackup *read_backup(const char *root_dir);
extern void write_backup(pgBackup *backup, bool strict);
extern void write_backup_status(pgBackup *backup, BackupStatus status,
bool strict);
extern void write_backup_data_bytes(pgBackup *backup);
extern bool lock_backup(pgBackup *backup, bool strict, bool exclusive);
extern const char *pgBackupGetBackupMode(pgBackup *backup, bool show_color);
extern void pgBackupGetBackupModeColor(pgBackup *backup, char *mode);
extern parray *catalog_get_instance_list(CatalogState *catalogState);
extern parray *catalog_get_backup_list(InstanceState *instanceState, time_t requested_backup_id);
extern void catalog_lock_backup_list(parray *backup_list, int from_idx,
int to_idx, bool strict, bool exclusive);
extern pgBackup *catalog_get_last_data_backup(parray *backup_list,
TimeLineID tli,
time_t current_start_time);
extern pgBackup *get_multi_timeline_parent(parray *backup_list, parray *tli_list,
TimeLineID current_tli, time_t current_start_time,
InstanceConfig *instance);
extern timelineInfo *timelineInfoNew(TimeLineID tli);
extern void timelineInfoFree(void *tliInfo);
extern parray *catalog_get_timelines(InstanceState *instanceState, InstanceConfig *instance);
extern void do_set_backup(InstanceState *instanceState, time_t backup_id,
pgSetBackupParams *set_backup_params);
extern void pin_backup(pgBackup *target_backup,
pgSetBackupParams *set_backup_params);
extern void add_note(pgBackup *target_backup, char *note);
extern void pgBackupWriteControl(FILE *out, pgBackup *backup, bool utc);
extern void write_backup_filelist(pgBackup *backup, parray *files,
const char *root, parray *external_list, bool sync);
extern void pgBackupCreateDir(pgBackup *backup, InstanceState *instanceState, time_t start_time);
extern void pgNodeInit(PGNodeInfo *node);
extern void pgBackupInit(pgBackup *backup);
extern void pgBackupFree(void *backup);
extern int pgBackupCompareId(const void *f1, const void *f2);
extern int pgBackupCompareIdDesc(const void *f1, const void *f2);
extern int pgBackupCompareIdEqual(const void *l, const void *r);
extern pgBackup* find_parent_full_backup(pgBackup *current_backup);
extern int scan_parent_chain(pgBackup *current_backup, pgBackup **result_backup);
/* return codes for scan_parent_chain */
#define ChainIsBroken 0
#define ChainIsInvalid 1
#define ChainIsOk 2