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Commit95ef43c

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Widen amount-to-flush arguments of FileWriteback and callers.
It's silly to define these counts as narrower than they might somedayneed to be. Also, I believe that the BLCKSZ * nflush calculation inmdwriteback was capable of overflowing an int.
1 parentfa11a09 commit95ef43c

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5 files changed

+17
-16
lines changed

5 files changed

+17
-16
lines changed

‎src/backend/storage/file/fd.c

Lines changed: 7 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -1538,28 +1538,28 @@ FilePrefetch(File file, off_t offset, int amount)
15381538
}
15391539

15401540
void
1541-
FileWriteback(Filefile,off_toffset,intamount)
1541+
FileWriteback(Filefile,off_toffset,off_tnbytes)
15421542
{
15431543
intreturnCode;
15441544

15451545
Assert(FileIsValid(file));
15461546

1547-
DO_DB(elog(LOG,"FileWriteback: %d (%s) "INT64_FORMAT"%d",
1547+
DO_DB(elog(LOG,"FileWriteback: %d (%s) "INT64_FORMAT""INT64_FORMAT,
15481548
file,VfdCache[file].fileName,
1549-
(int64)offset,amount));
1549+
(int64)offset,(int64)nbytes));
15501550

15511551
/*
1552-
* Caution: do not call pg_flush_data withamount = 0, it could trash the
1553-
* file's seek position.
1552+
* Caution: do not call pg_flush_data withnbytes = 0, it could trash the
1553+
* file's seek position. We prefer to define that as a no-op here.
15541554
*/
1555-
if (amount <=0)
1555+
if (nbytes <=0)
15561556
return;
15571557

15581558
returnCode=FileAccess(file);
15591559
if (returnCode<0)
15601560
return;
15611561

1562-
pg_flush_data(VfdCache[file].fd,offset,amount);
1562+
pg_flush_data(VfdCache[file].fd,offset,nbytes);
15631563
}
15641564

15651565
int

‎src/backend/storage/smgr/md.c

Lines changed: 5 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -669,15 +669,16 @@ mdprefetch(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum)
669669
* considerably more efficient than doing so individually.
670670
*/
671671
void
672-
mdwriteback(SMgrRelationreln,ForkNumberforknum,BlockNumberblocknum,intnblocks)
672+
mdwriteback(SMgrRelationreln,ForkNumberforknum,
673+
BlockNumberblocknum,BlockNumbernblocks)
673674
{
674675
/*
675676
* Issue flush requests in as few requests as possible; have to split at
676677
* segment boundaries though, since those are actually separate files.
677678
*/
678-
while (nblocks!=0)
679+
while (nblocks>0)
679680
{
680-
intnflush=nblocks;
681+
BlockNumbernflush=nblocks;
681682
off_tseekpos;
682683
MdfdVec*v;
683684
intsegnum_start,
@@ -706,7 +707,7 @@ mdwriteback(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum, int nbl
706707

707708
seekpos= (off_t)BLCKSZ*(blocknum % ((BlockNumber)RELSEG_SIZE));
708709

709-
FileWriteback(v->mdfd_vfd,seekpos,BLCKSZ*nflush);
710+
FileWriteback(v->mdfd_vfd,seekpos,(off_t)BLCKSZ*nflush);
710711

711712
nblocks-=nflush;
712713
blocknum+=nflush;

‎src/backend/storage/smgr/smgr.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -54,7 +54,7 @@ typedef struct f_smgr
5454
void(*smgr_write) (SMgrRelationreln,ForkNumberforknum,
5555
BlockNumberblocknum,char*buffer,boolskipFsync);
5656
void(*smgr_writeback) (SMgrRelationreln,ForkNumberforknum,
57-
BlockNumberblocknum,intnblocks);
57+
BlockNumberblocknum,BlockNumbernblocks);
5858
BlockNumber (*smgr_nblocks) (SMgrRelationreln,ForkNumberforknum);
5959
void(*smgr_truncate) (SMgrRelationreln,ForkNumberforknum,
6060
BlockNumbernblocks);
@@ -658,7 +658,7 @@ smgrwrite(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum,
658658
*/
659659
void
660660
smgrwriteback(SMgrRelationreln,ForkNumberforknum,BlockNumberblocknum,
661-
intnblocks)
661+
BlockNumbernblocks)
662662
{
663663
(*(smgrsw[reln->smgr_which].smgr_writeback)) (reln,forknum,blocknum,
664664
nblocks);

‎src/include/storage/fd.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -74,7 +74,7 @@ extern intFileWrite(File file, char *buffer, int amount);
7474
externintFileSync(Filefile);
7575
externoff_tFileSeek(Filefile,off_toffset,intwhence);
7676
externintFileTruncate(Filefile,off_toffset);
77-
externvoidFileWriteback(Filefile,off_toffset,intamount);
77+
externvoidFileWriteback(Filefile,off_toffset,off_tnbytes);
7878
externchar*FilePathName(Filefile);
7979
externintFileGetRawDesc(Filefile);
8080
externintFileGetRawFlags(Filefile);

‎src/include/storage/smgr.h

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -97,7 +97,7 @@ extern void smgrread(SMgrRelation reln, ForkNumber forknum,
9797
externvoidsmgrwrite(SMgrRelationreln,ForkNumberforknum,
9898
BlockNumberblocknum,char*buffer,boolskipFsync);
9999
externvoidsmgrwriteback(SMgrRelationreln,ForkNumberforknum,
100-
BlockNumberblocknum,intnblocks);
100+
BlockNumberblocknum,BlockNumbernblocks);
101101
externBlockNumbersmgrnblocks(SMgrRelationreln,ForkNumberforknum);
102102
externvoidsmgrtruncate(SMgrRelationreln,ForkNumberforknum,
103103
BlockNumbernblocks);
@@ -125,7 +125,7 @@ extern void mdread(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum,
125125
externvoidmdwrite(SMgrRelationreln,ForkNumberforknum,
126126
BlockNumberblocknum,char*buffer,boolskipFsync);
127127
externvoidmdwriteback(SMgrRelationreln,ForkNumberforknum,
128-
BlockNumberblocknum,intnblocks);
128+
BlockNumberblocknum,BlockNumbernblocks);
129129
externBlockNumbermdnblocks(SMgrRelationreln,ForkNumberforknum);
130130
externvoidmdtruncate(SMgrRelationreln,ForkNumberforknum,
131131
BlockNumbernblocks);

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