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Code Issues Releases Activity

fix restore of the truncated files. code cleanup

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This commit is contained in:
Anastasia 2018-01-15 16:33:17 +03:00
parent 0c2ce64c1b
commit 5b5fe6ea5c
1 changed files with 11 additions and 12 deletions
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23
src/data.c
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@ -100,7 +100,7 @@ typedef struct BackupPageHeader
} BackupPageHeader;
/* Special value for compressed_size field */
#define PageIsTruncated -1
#define PageIsTruncated -2
/* Verify page's header */
static bool
@ -239,6 +239,7 @@ backup_data_page(pgFile *file, XLogRecPtr prev_backup_start_lsn,
BlockNumber absolute_blknum = file->segno * RELSEG_SIZE + blknum;
header.block = blknum;
header.compressed_size = 0;
/*
* Read the page and verify its header and checksum.
@ -256,11 +257,11 @@ backup_data_page(pgFile *file, XLogRecPtr prev_backup_start_lsn,
if (result == 0)
{
/* This block was truncated.*/
// header.compressed_size = PageIsTruncated;
// page_is_valid = true;
header.compressed_size = PageIsTruncated;
page_is_valid = true;
/* Page is not actually valid, but it is absent
* and we're not going to reread it or validate */
//elog(WARNING, "backup blkno %u. PageIsTruncated", blknum);
// elog(WARNING, "backup blkno %u. PageIsTruncated", blknum);
}
if (result == 1)
@ -283,7 +284,7 @@ backup_data_page(pgFile *file, XLogRecPtr prev_backup_start_lsn,
{
/* This block was truncated.*/
header.compressed_size = PageIsTruncated;
elog(WARNING, "backup blkno %u. reread PageIsTruncated", blknum);
// elog(WARNING, "backup blkno %u. reread PageIsTruncated", blknum);
}
else if (page_size != BLCKSZ)
{
@ -311,11 +312,7 @@ backup_data_page(pgFile *file, XLogRecPtr prev_backup_start_lsn,
file->compress_alg = compress_alg;
/* if compression failed, reset size of the block */
if (header.compressed_size == -1)
header.compressed_size = BLCKSZ;
// elog(WARNING, "backup blkno %u. header.compressed_size %d", blknum, header.compressed_size);
Assert (header.compressed_size <= BLCKSZ);
}
@ -326,10 +323,12 @@ backup_data_page(pgFile *file, XLogRecPtr prev_backup_start_lsn,
if (header.compressed_size == PageIsTruncated)
{
memcpy(write_buffer, &header, sizeof(header));
// elog(WARNING, "page was truncated in file %s block %u", file->path, header.block);
}
/* The page compression failed. Write it as is. */
else if (header.compressed_size == BLCKSZ || header.compressed_size == 0)
else if (header.compressed_size == -1)
{
header.compressed_size = BLCKSZ;
memcpy(write_buffer, &header, sizeof(header));
memcpy(write_buffer + sizeof(header), page, BLCKSZ);
write_buffer_size += header.compressed_size;
@ -587,7 +586,7 @@ restore_data_file(const char *from_root,
* Truncate file to this length.
*/
ftruncate(fileno(out), header.block * BLCKSZ);
elog(WARNING, "truncate file %s to block %u", file->path, header.block);
elog(VERBOSE, "truncate file %s to block %u", file->path, header.block);
break;
}