diff options
Diffstat (limited to 'sql/rpl_utility.cc')
| -rw-r--r-- | sql/rpl_utility.cc | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/sql/rpl_utility.cc b/sql/rpl_utility.cc index 8638d5e3c16..4ab4542dd13 100644 --- a/sql/rpl_utility.cc +++ b/sql/rpl_utility.cc @@ -303,7 +303,7 @@ uint32 table_def::calc_field_size(uint col, uchar *master_data) const always read the length in little-endian order. */ Field_blob fb(m_field_metadata[col]); - length= fb.get_packed_size(master_data, TRUE); + length= fb.get_packed_size(master_data); #else /* Compute the length of the data. We cannot use get_length() here @@ -1056,3 +1056,58 @@ table_def::~table_def() #endif } +/** + @param even_buf point to the buffer containing serialized event + @param event_len length of the event accounting possible checksum alg + + @return TRUE if test fails + FALSE as success +*/ +bool event_checksum_test(uchar *event_buf, ulong event_len, uint8 alg) +{ + bool res= FALSE; + uint16 flags= 0; // to store in FD's buffer flags orig value + + if (alg != BINLOG_CHECKSUM_ALG_OFF && alg != BINLOG_CHECKSUM_ALG_UNDEF) + { + ha_checksum incoming; + ha_checksum computed; + + if (event_buf[EVENT_TYPE_OFFSET] == FORMAT_DESCRIPTION_EVENT) + { +#ifndef DBUG_OFF + int8 fd_alg= event_buf[event_len - BINLOG_CHECKSUM_LEN - + BINLOG_CHECKSUM_ALG_DESC_LEN]; +#endif + /* + FD event is checksummed and therefore verified w/o the binlog-in-use flag + */ + flags= uint2korr(event_buf + FLAGS_OFFSET); + if (flags & LOG_EVENT_BINLOG_IN_USE_F) + event_buf[FLAGS_OFFSET] &= ~LOG_EVENT_BINLOG_IN_USE_F; + /* + The only algorithm currently is CRC32. Zero indicates + the binlog file is checksum-free *except* the FD-event. + */ + DBUG_ASSERT(fd_alg == BINLOG_CHECKSUM_ALG_CRC32 || fd_alg == 0); + DBUG_ASSERT(alg == BINLOG_CHECKSUM_ALG_CRC32); + /* + Complile time guard to watch over the max number of alg + */ + compile_time_assert(BINLOG_CHECKSUM_ALG_ENUM_END <= 0x80); + } + incoming= uint4korr(event_buf + event_len - BINLOG_CHECKSUM_LEN); + computed= my_checksum(0L, NULL, 0); + /* checksum the event content but the checksum part itself */ + computed= my_checksum(computed, (const uchar*) event_buf, + event_len - BINLOG_CHECKSUM_LEN); + if (flags != 0) + { + /* restoring the orig value of flags of FD */ + DBUG_ASSERT(event_buf[EVENT_TYPE_OFFSET] == FORMAT_DESCRIPTION_EVENT); + event_buf[FLAGS_OFFSET]= (uchar) flags; + } + res= !(computed == incoming); + } + return DBUG_EVALUATE_IF("simulate_checksum_test_failure", TRUE, res); +} |