Commit 191ceaff authored by unknown's avatar unknown

postmerge changes.

parent 18d408a9
......@@ -2266,7 +2266,7 @@ static my_bool translog_buffer_flush(struct st_translog_buffer *buffer)
Send page by page in the pagecache what we are going to write on the
disk
*/
file.file= buffer->file;
file= buffer->file;
for (i= 0, pg= LSN_OFFSET(buffer->offset) / TRANSLOG_PAGE_SIZE;
i < buffer->size;
i+= TRANSLOG_PAGE_SIZE, pg++)
......@@ -2407,6 +2407,68 @@ translog_dummy_callback(__attribute__((unused)) uchar *page,
}
/**
@brief Checks and removes sector protection.
@param page reference on the page content.
@param file transaction log descriptor.
@retvat 0 OK
@retval 1 Error
*/
static my_bool
translog_check_sector_protection(uchar *page, TRANSLOG_FILE *file)
{
uint i, offset;
uchar *table= page + page_overhead[page[TRANSLOG_PAGE_FLAGS]] -
TRANSLOG_PAGE_SIZE / DISK_DRIVE_SECTOR_SIZE; ;
uint8 current= table[0];
DBUG_ENTER("translog_check_sector_protection");
for (i= 1, offset= DISK_DRIVE_SECTOR_SIZE;
i < TRANSLOG_PAGE_SIZE / DISK_DRIVE_SECTOR_SIZE;
i++, offset+= DISK_DRIVE_SECTOR_SIZE)
{
/*
TODO: add chunk counting for "suspecting" sectors (difference is
more than 1-2), if difference more then present chunks then it is
the problem.
*/
uint8 test= page[offset];
DBUG_PRINT("info", ("sector: #%u offset: %u current: %lx "
"read: 0x%x stored: 0x%x%x",
i, offset, (ulong) current,
(uint) uint2korr(page + offset), (uint) table[i],
(uint) table[i + 1]));
/*
3 is minimal possible record length. So we can have "distance"
between 2 sectors value more then DISK_DRIVE_SECTOR_SIZE / 3
only if it is old value, i.e. the sector was not written.
*/
if (((test < current) &&
(0xFFL - current + test > DISK_DRIVE_SECTOR_SIZE / 3)) ||
((test >= current) &&
(test - current > DISK_DRIVE_SECTOR_SIZE / 3)))
{
if (translog_recover_page_up_to_sector(page, offset))
DBUG_RETURN(1);
file->was_recovered= 1;
DBUG_RETURN(0);
}
/* Restore value on the page */
page[offset]= table[i];
current= test;
DBUG_PRINT("info", ("sector: #%u offset: %u current: %lx "
"read: 0x%x stored: 0x%x",
i, offset, (ulong) current,
(uint) page[offset], (uint) table[i]));
}
DBUG_RETURN(0);
}
/**
@brief Log page validator (read callback)
......@@ -2476,50 +2538,10 @@ static my_bool translog_page_validator(uchar *page,
}
page_pos+= CRC_SIZE; /* Skip crc */
}
if (flags & TRANSLOG_SECTOR_PROTECTION)
{
uint i, offset;
uchar *table= page_pos;
uint8 current= table[0];
for (i= 1, offset= DISK_DRIVE_SECTOR_SIZE;
i < TRANSLOG_PAGE_SIZE / DISK_DRIVE_SECTOR_SIZE;
i++, offset+= DISK_DRIVE_SECTOR_SIZE)
{
/*
TODO: add chunk counting for "suspecting" sectors (difference is
more than 1-2), if difference more then present chunks then it is
the problem.
*/
uint8 test= page[offset];
DBUG_PRINT("info", ("sector: #%u offset: %u current: %lx "
"read: 0x%x stored: 0x%x%x",
i, offset, (ulong) current,
(uint) uint2korr(page + offset), (uint) table[i],
(uint) table[i + 1]));
/*
3 is minimal possible record length. So we can have "distance"
between 2 sectors value more then DISK_DRIVE_SECTOR_SIZE / 3
only if it is old value, i.e. the sector was not written.
*/
if (((test < current) &&
(0xFFL - current + test > DISK_DRIVE_SECTOR_SIZE / 3)) ||
((test >= current) &&
(test - current > DISK_DRIVE_SECTOR_SIZE / 3)))
if (flags & TRANSLOG_SECTOR_PROTECTION &&
translog_check_sector_protection(page, data))
{
if (translog_recover_page_up_to_sector(page, offset))
DBUG_RETURN(1);
data->was_recovered= 1;
DBUG_RETURN(0);
}
/* Restore value on the page */
page[offset]= table[i];
current= test;
DBUG_PRINT("info", ("sector: #%u offset: %u current: %lx "
"read: 0x%x stored: 0x%x",
i, offset, (ulong) current,
(uint) page[offset], (uint) table[i]));
}
}
DBUG_RETURN(0);
}
......@@ -2729,15 +2751,14 @@ static uchar *translog_get_page(TRANSLOG_VALIDATOR_DATA *data, uchar *buffer,
}
file= get_logfile_by_number(file_no);
buffer=
(uchar*) pagecache_valid_read(log_descriptor.pagecache, &file->handler,
(uchar*) pagecache_read(log_descriptor.pagecache, &file->handler,
LSN_OFFSET(addr) / TRANSLOG_PAGE_SIZE,
3, (direct_link ? NULL : (char*) buffer),
PAGECACHE_PLAIN_PAGE,
(direct_link ?
PAGECACHE_LOCK_READ :
PAGECACHE_LOCK_LEFT_UNLOCKED),
direct_link,
&translog_page_validator, (uchar*) data);
direct_link);
DBUG_PRINT("info", ("Direct link is assigned to : 0x%lx * 0x%lx",
(ulong) direct_link,
(ulong)(direct_link ? *direct_link : NULL)));
......
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