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Commit5bc7164

Browse files
author
Michael Paquier
committed
Begin cleanup of version-related code
Due to changes in XlogRecPtr in 9.3, older version of pg_rman arealready incompatible either way, and it is a pain to maintain codeduplicated from past versions of Postgres, so rely a maximum on thecore structures.
1 parent83462de commit5bc7164

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4 files changed

+56
-115
lines changed

4 files changed

+56
-115
lines changed

‎backup.c‎

Lines changed: 29 additions & 39 deletions
Original file line numberDiff line numberDiff line change
@@ -20,17 +20,23 @@
2020
#include"libpq/pqsignal.h"
2121
#include"pgut/pgut-port.h"
2222

23-
#defineTIMEOUT_ARCHIVE10/* wait 10 sec until WAL archive complete */
23+
/* wait 10 sec until WAL archive complete */
24+
#defineTIMEOUT_ARCHIVE10
25+
26+
/* Server version */
27+
staticintserver_version=0;
2428

2529
staticboolin_backup= false;/* TODO: more robust logic */
26-
staticparray*cleanup_list;/* list of command to execute at error processing for snapshot */
30+
/* List of commands to execute at error processing for snapshot */
31+
staticparray*cleanup_list;
2732

2833
/*
2934
* Backup routines
3035
*/
3136
staticvoidbackup_cleanup(boolfatal,void*userdata);
32-
staticvoiddelete_old_files(constchar*root,parray*files,intkeep_files,
33-
intkeep_days,intserver_version,boolis_arclog);
37+
staticvoiddelete_old_files(constchar*root,
38+
parray*files,intkeep_files,
39+
intkeep_days,boolis_arclog);
3440
staticvoidbackup_files(constchar*from_root,constchar*to_root,
3541
parray*files,parray*prev_files,constXLogRecPtr*lsn,boolcompress,constchar*prefix);
3642
staticparray*do_backup_database(parray*backup_list,pgBackupOptionbkupopt);
@@ -710,7 +716,6 @@ do_backup(pgBackupOption bkupopt)
710716
parray*files_database;
711717
parray*files_arclog;
712718
parray*files_srvlog;
713-
intserver_version;
714719
intret;
715720

716721
/* repack the necesary options */
@@ -745,7 +750,7 @@ do_backup(pgBackupOption bkupopt)
745750
#endif
746751

747752
/* confirm data block size and xlog block size are compatible */
748-
server_version=get_server_version();
753+
check_server_version();
749754

750755
/* setup cleanup callback function */
751756
in_backup= true;
@@ -837,10 +842,10 @@ do_backup(pgBackupOption bkupopt)
837842
*/
838843
if (HAVE_ARCLOG(&current))
839844
delete_old_files(arclog_path,files_arclog,keep_arclog_files,
840-
keep_arclog_days,server_version,true);
845+
keep_arclog_days, true);
841846
if (current.with_serverlog)
842847
delete_old_files(srvlog_path,files_srvlog,keep_srvlog_files,
843-
keep_srvlog_days,server_version,false);
848+
keep_srvlog_days, false);
844849

845850
/* Delete old backup files after all backup operation. */
846851
pgBackupDelete(keep_data_generations,keep_data_days);
@@ -951,15 +956,14 @@ make_backup_label(parray *backup_list)
951956
/*
952957
* get server version and confirm block sizes.
953958
*/
954-
int
955-
get_server_version(void)
959+
void
960+
check_server_version(void)
956961
{
957-
staticintserver_version=0;
958962
boolmy_conn;
959963

960-
/*return cached serverversion */
964+
/*Leave if serverhas already been checked */
961965
if (server_version>0)
962-
returnserver_version;
966+
return;
963967

964968
my_conn= (connection==NULL);
965969

@@ -968,22 +972,19 @@ get_server_version(void)
968972

969973
/* confirm server version */
970974
server_version=PQserverVersion(connection);
971-
if (server_version<80200)
975+
if (server_version!=PG_VERSION_NUM)
972976
elog(ERROR_PG_INCOMPATIBLE,
973-
_("server version is %d.%d.%d,butmust be8.2 or higher."),
974-
server_version /10000,
975-
(server_version /100) %100,
976-
server_version %100);
977+
_("server version is %d.%d.%d, must be%s or higher."),
978+
server_version /10000,
979+
(server_version /100) %100,
980+
server_version %100,PG_MAJORVERSION);
977981

978982
/* confirm block_size (BLCKSZ) and wal_block_size (XLOG_BLCKSZ) */
979983
confirm_block_size("block_size",BLCKSZ);
980-
if (server_version >=80400)
981-
confirm_block_size("wal_block_size",XLOG_BLCKSZ);
984+
confirm_block_size("wal_block_size",XLOG_BLCKSZ);
982985

983986
if (my_conn)
984987
disconnect();
985-
986-
returnserver_version;
987988
}
988989

989990
staticvoid
@@ -1013,25 +1014,15 @@ pg_start_backup(const char *label, bool smooth, pgBackup *backup)
10131014
{
10141015
PGresult*res;
10151016
constchar*params[2];
1016-
intserver_version;
10171017

10181018
params[0]=label;
10191019

10201020
reconnect();
1021-
server_version=get_server_version();
1022-
if (server_version >=80400)
1023-
{
1024-
/* 2nd argument is 'fast'*/
1025-
params[1]=smooth ?"false" :"true";
1026-
res=execute("SELECT * from pg_xlogfile_name_offset(pg_start_backup($1, $2))",2,params);
1027-
}
1028-
else
1029-
{
1030-
/* v8.3 always uses smooth checkpoint */
1031-
if (!smooth&&server_version >=80300)
1032-
command("CHECKPOINT",0,NULL);
1033-
res=execute("SELECT * from pg_xlogfile_name_offset(pg_start_backup($1))",1,params);
1034-
}
1021+
1022+
/* 2nd argument is 'fast'*/
1023+
params[1]=smooth ?"false" :"true";
1024+
res=execute("SELECT * from pg_xlogfile_name_offset(pg_start_backup($1, $2))",2,params);
1025+
10351026
if (backup!=NULL)
10361027
get_lsn(res,&backup->tli,&backup->start_lsn);
10371028
PQclear(res);
@@ -1419,7 +1410,6 @@ delete_old_files(const char *root,
14191410
parray*files,
14201411
intkeep_files,
14211412
intkeep_days,
1422-
intserver_version,
14231413
boolis_arclog)
14241414
{
14251415
inti;
@@ -1460,7 +1450,7 @@ delete_old_files(const char *root,
14601450

14611451
elog(LOG,"%s() %s",__FUNCTION__,file->path);
14621452
/* Delete completed WALs only. */
1463-
if (is_arclog&& !xlog_is_complete_wal(file,server_version))
1453+
if (is_arclog&& !xlog_is_complete_wal(file))
14641454
{
14651455
elog(LOG,"%s() not complete WAL",__FUNCTION__);
14661456
continue;

‎data.c‎

Lines changed: 22 additions & 61 deletions
Original file line numberDiff line numberDiff line change
@@ -18,10 +18,6 @@
1818
#include"storage/block.h"
1919
#include"storage/bufpage.h"
2020

21-
#ifPG_VERSION_NUM<80300
22-
#defineXLogRecPtrIsInvalid(r)((r).xrecoff == 0)
23-
#endif
24-
2521
#ifdefHAVE_LIBZ
2622
#include<zlib.h>
2723

@@ -156,10 +152,6 @@ doInflate(z_stream *zp, size_t in_size, size_t out_size,void *inbuf,
156152
}
157153
#endif
158154

159-
#definePG_PAGE_LAYOUT_VERSION_v802/* 8.0 */
160-
#definePG_PAGE_LAYOUT_VERSION_v813/* 8.1 - 8.2 */
161-
#definePG_PAGE_LAYOUT_VERSION_v834/* 8.3 - */
162-
163155
/* 80000 <= PG_VERSION_NUM < 80300 */
164156
typedefstructPageHeaderData_v80
165157
{
@@ -201,9 +193,8 @@ typedef struct PageHeaderData_v83
201193

202194
typedefunionDataPage
203195
{
204-
PageHeaderData_v80v80;/* 8.0 - 8.2 */
205-
PageHeaderData_v83v83;/* 8.3 - */
206-
chardata[BLCKSZ];
196+
PageHeaderDatapage_data;
197+
chardata[BLCKSZ];
207198
}DataPage;
208199

209200
typedefstructBackupPageHeader
@@ -214,56 +205,27 @@ typedef struct BackupPageHeader
214205
}BackupPageHeader;
215206

216207
staticbool
217-
parse_page(constDataPage*page,intserver_version,
208+
parse_page(constDataPage*page,
218209
XLogRecPtr*lsn,uint16*offset,uint16*length)
219210
{
220-
uint16page_layout_version;
221-
222-
/* Determine page layout version */
223-
if (server_version<80100)
224-
page_layout_version=PG_PAGE_LAYOUT_VERSION_v80;
225-
elseif (server_version<80300)
226-
page_layout_version=PG_PAGE_LAYOUT_VERSION_v81;
227-
else
228-
page_layout_version=PG_PAGE_LAYOUT_VERSION_v83;
229-
230-
/* Check normal case */
231-
if (server_version<80300)
211+
constPageHeaderData*page_data=&page->page_data;
212+
213+
/* Get lsn from page header */
214+
*lsn=PageXLogRecPtrGet(page_data->pd_lsn);
215+
216+
if (PageGetPageSize(page_data)==BLCKSZ&&
217+
PageGetPageLayoutVersion(page_data)==PG_PAGE_LAYOUT_VERSION&&
218+
(page_data->pd_flags& ~PD_VALID_FLAG_BITS)==0&&
219+
page_data->pd_lower >=SizeOfPageHeaderData&&
220+
page_data->pd_lower <=page_data->pd_upper&&
221+
page_data->pd_upper <=page_data->pd_special&&
222+
page_data->pd_special <=BLCKSZ&&
223+
page_data->pd_special==MAXALIGN(page_data->pd_special)&&
224+
!XLogRecPtrIsInvalid(*lsn))
232225
{
233-
constPageHeaderData_v80*v80=&page->v80;
234-
235-
if (PageGetPageSize_v80(v80)==BLCKSZ&&
236-
PageGetPageLayoutVersion_v80(v80)==page_layout_version&&
237-
v80->pd_lower >=SizeOfPageHeaderData_v80&&
238-
v80->pd_lower <=v80->pd_upper&&
239-
v80->pd_upper <=v80->pd_special&&
240-
v80->pd_special <=BLCKSZ&&
241-
v80->pd_special==MAXALIGN(v80->pd_special)&&
242-
!XLogRecPtrIsInvalid(*lsn=v80->pd_lsn))
243-
{
244-
*offset=v80->pd_lower;
245-
*length=v80->pd_upper-v80->pd_lower;
246-
return true;
247-
}
248-
}
249-
else
250-
{
251-
constPageHeaderData_v83*v83=&page->v83;
252-
253-
if (PageGetPageSize_v83(v83)==BLCKSZ&&
254-
PageGetPageLayoutVersion_v83(v83)==page_layout_version&&
255-
(v83->pd_flags& ~PD_VALID_FLAG_BITS_v83)==0&&
256-
v83->pd_lower >=SizeOfPageHeaderData_v83&&
257-
v83->pd_lower <=v83->pd_upper&&
258-
v83->pd_upper <=v83->pd_special&&
259-
v83->pd_special <=BLCKSZ&&
260-
v83->pd_special==MAXALIGN(v83->pd_special)&&
261-
!XLogRecPtrIsInvalid(*lsn=v83->pd_lsn))
262-
{
263-
*offset=v83->pd_lower;
264-
*length=v83->pd_upper-v83->pd_lower;
265-
return true;
266-
}
226+
*offset=page_data->pd_lower;
227+
*length=page_data->pd_upper-page_data->pd_lower;
228+
return true;
267229
}
268230

269231
*offset=*length=0;
@@ -289,7 +251,6 @@ backup_data_file(const char *from_root, const char *to_root,
289251
size_tread_len;
290252
interrno_tmp;
291253
pg_crc32crc;
292-
intserver_version;
293254
#ifdefHAVE_LIBZ
294255
z_streamz;
295256
charoutbuf[zlibOutSize];
@@ -351,7 +312,7 @@ backup_data_file(const char *from_root, const char *to_root,
351312
#endif
352313

353314
/* confirm server version */
354-
server_version=get_server_version();
315+
check_server_version();
355316

356317
/* read each page and write the page excluding hole */
357318
for (blknum=0;
@@ -368,7 +329,7 @@ backup_data_file(const char *from_root, const char *to_root,
368329
* If a invalid data page was found, fallback to simple copy to ensure
369330
* all pages in the file don't have BackupPageHeader.
370331
*/
371-
if (!parse_page(&page,server_version,&page_lsn,
332+
if (!parse_page(&page,&page_lsn,
372333
&header.hole_offset,&header.hole_length))
373334
{
374335
elog(LOG,"%s fall back to simple copy",file->path);

‎pg_rman.h‎

Lines changed: 3 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -20,16 +20,8 @@
2020
#include"utils/pg_crc.h"
2121
#include"parray.h"
2222

23-
#ifPG_VERSION_NUM<80200
24-
#defineXLOG_BLCKSZBLCKSZ
25-
#endif
26-
27-
#ifPG_VERSION_NUM<80300
28-
#defineTXID_CURRENT_SQL"SELECT transactionid FROM pg_locks WHERE locktype = 'transactionid' AND pid = pg_backend_pid();"
29-
#include<sys/stat.h>
30-
#else
23+
/* Query to fetch current transaction ID */
3124
#defineTXID_CURRENT_SQL"SELECT txid_current();"
32-
#endif
3325

3426
/* Directory/File names */
3527
#defineDATABASE_DIR"database"
@@ -241,7 +233,7 @@ extern const char *pgdata_exclude[];
241233
/* in backup.c */
242234
externintdo_backup(pgBackupOptionbkupopt);
243235
externBackupModeparse_backup_mode(constchar*value,intelevel);
244-
externintget_server_version(void);
236+
externvoidcheck_server_version(void);
245237
externboolfileExists(constchar*path);
246238

247239
/* in restore.c */
@@ -306,7 +298,7 @@ extern int pgFileCompareMtime(const void *f1, const void *f2);
306298
externintpgFileCompareMtimeDesc(constvoid*f1,constvoid*f2);
307299

308300
/* in xlog.c */
309-
externboolxlog_is_complete_wal(constpgFile*file,intserver_version);
301+
externboolxlog_is_complete_wal(constpgFile*file);
310302
externvoidxlog_fname(char*fname,size_tlen,TimeLineIDtli,XLogRecPtr*lsn);
311303

312304
/* in data.c */

‎xlog.c‎

Lines changed: 2 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -14,10 +14,8 @@
1414
#include<sys/stat.h>
1515
#include<unistd.h>
1616

17-
#ifPG_VERSION_NUM >=80400
1817
typedefunsigned longDatum;
1918
typedefstructMemoryContextData*MemoryContext;
20-
#endif
2119

2220
#include"access/xlog_internal.h"
2321

@@ -37,7 +35,7 @@ typedef union XLogPage
3735
* based on ValidXLOGHeader() in src/backend/access/transam/xlog.c.
3836
*/
3937
bool
40-
xlog_is_complete_wal(constpgFile*file,intserver_version)
38+
xlog_is_complete_wal(constpgFile*file)
4139
{
4240
FILE*fp;
4341
XLogPagepage;
@@ -61,7 +59,7 @@ xlog_is_complete_wal(const pgFile *file, int server_version)
6159
return false;
6260
if (page.lheader.xlp_seg_size!=XLogSegSize)
6361
return false;
64-
if (server_version >=80300&&page.lheader.xlp_xlog_blcksz!=XLOG_BLCKSZ)
62+
if (page.lheader.xlp_xlog_blcksz!=XLOG_BLCKSZ)
6563
return false;
6664

6765
/*

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