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Code Issues Releases Activity

Refactored calc_file_checksum()

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This commit is contained in:
Sergey Cherkashin
2018-11-15 18:22:43 +03:00
parent 6d0cbfa232
commit f53395529b
6 changed files with 40 additions and 81 deletions
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src/data.c
+5 -67
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@@ -1418,75 +1418,13 @@ get_wal_file(const char *from_path, const char *to_path)
* but created in process of backup, such as stream XLOG files,
* PG_TABLESPACE_MAP_FILE and PG_BACKUP_LABEL_FILE.
*/
bool
void
calc_file_checksum(pgFile *file)
{
FILE *in;
size_t read_len = 0;
int errno_tmp;
char buf[BLCKSZ];
struct stat st;
pg_crc32 crc;
Assert(S_ISREG(file->mode));
INIT_TRADITIONAL_CRC32(crc);
/* reset size summary */
file->read_size = 0;
file->write_size = 0;
/* open backup mode file for read */
in = fopen(file->path, PG_BINARY_R);
if (in == NULL)
{
FIN_TRADITIONAL_CRC32(crc);
file->crc = crc;
/* maybe deleted, it's not error */
if (errno == ENOENT)
return false;
elog(ERROR, "cannot open source file \"%s\": %s", file->path,
strerror(errno));
}
/* stat source file to change mode of destination file */
if (fstat(fileno(in), &st) == -1)
{
fclose(in);
elog(ERROR, "cannot stat \"%s\": %s", file->path,
strerror(errno));
}
for (;;)
{
read_len = fread(buf, 1, sizeof(buf), in);
if(read_len == 0)
break;
/* update CRC */
COMP_TRADITIONAL_CRC32(crc, buf, read_len);
file->write_size += read_len;
file->read_size += read_len;
}
errno_tmp = errno;
if (!feof(in))
{
fclose(in);
elog(ERROR, "cannot read backup mode file \"%s\": %s",
file->path, strerror(errno_tmp));
}
/* finish CRC calculation and store into pgFile */
FIN_TRADITIONAL_CRC32(crc);
file->crc = crc;
fclose(in);
return true;
file->crc = pgFileGetCRC(file->path, false, false, &file->read_size);
file->write_size = file->read_size;
}
/*
@@ -1779,11 +1717,11 @@ fileEqualCRC(const char *path1, const char *path2, bool path2_is_compressed)
else
#endif
{
crc2 = pgFileGetCRC(path2);
crc2 = pgFileGetCRC(path2, false, true, NULL);
}
/* Get checksum of original file */
crc1 = pgFileGetCRC(path1);
crc1 = pgFileGetCRC(path1, false, true, NULL);
return EQ_CRC32C(crc1, crc2);
}