Merge bk-internal.mysql.com:/home/bk/mysql-5.0-engines (861d0388) · Commits · Software / OSDI20 Artifacts / mariadb

myisam/mi_check.c

+73 −17

Original line number	Diff line number	Diff line
		@@ -251,11 +251,12 @@ static int check_k_link(MI_CHECK param, register MI_INFO info, uint nr)
		my_off_t next_link;
		uint block_size=(nr+1)*MI_MIN_KEY_BLOCK_LENGTH;
		ha_rows records;
		char llbuff[21],*buff;
		char llbuff[21], llbuff2[21], *buff;
		DBUG_ENTER("check_k_link");
		DBUG_PRINT("enter", ("block_size: %u", block_size));

		if (param->testflag & T_VERBOSE)
		printf("block_size %4d:",block_size);
		printf("block_size %4u:", block_size); /* purecov: tested */

		next_link=info->s->state.key_del[nr];
		records= (ha_rows) (info->state->key_file_length / block_size);
		@@ -265,14 +266,46 @@ static int check_k_link(MI_CHECK param, register MI_INFO info, uint nr)
		DBUG_RETURN(1);
		if (param->testflag & T_VERBOSE)
		printf("%16s",llstr(next_link,llbuff));
		if (next_link > info->state->key_file_length \|\|
		next_link & (info->s->blocksize-1))

		/* Key blocks must lay within the key file length entirely. */
		if (next_link + block_size > info->state->key_file_length)
		{
		/* purecov: begin tested */
		mi_check_print_error(param, "Invalid key block position: %s "
		"key block size: %u file_length: %s",
		llstr(next_link, llbuff), block_size,
		llstr(info->state->key_file_length, llbuff2));
		DBUG_RETURN(1);
		/* purecov: end */
		}

		/* Key blocks must be aligned at MI_MIN_KEY_BLOCK_LENGTH. */
		if (next_link & (MI_MIN_KEY_BLOCK_LENGTH - 1))
		{
		/* purecov: begin tested */
		mi_check_print_error(param, "Mis-aligned key block: %s "
		"minimum key block length: %u",
		llstr(next_link, llbuff), MI_MIN_KEY_BLOCK_LENGTH);
		DBUG_RETURN(1);
		/* purecov: end */
		}

		/*
		Read the key block with MI_MIN_KEY_BLOCK_LENGTH to find next link.
		If the key cache block size is smaller than block_size, we can so
		avoid unecessary eviction of cache block.
		*/
		if (!(buff=key_cache_read(info->s->key_cache,
		info->s->kfile, next_link, DFLT_INIT_HITS,
		(byte*) info->buff,
		myisam_block_size, block_size, 1)))
		(byte*) info->buff, MI_MIN_KEY_BLOCK_LENGTH,
		MI_MIN_KEY_BLOCK_LENGTH, 1)))
		{
		/* purecov: begin tested */
		mi_check_print_error(param, "key cache read error for block: %s",
		llstr(next_link,llbuff));
		DBUG_RETURN(1);
		/* purecov: end */
		}
		next_link=mi_sizekorr(buff);
		records--;
		param->key_file_blocks+=block_size;
		@@ -556,17 +589,37 @@ static int chk_index_down(MI_CHECK param, MI_INFO info, MI_KEYDEF *keyinfo,
		ha_checksum *key_checksum, uint level)
		{
		char llbuff[22],llbuff2[22];
		if (page > info->state->key_file_length \|\| (page & (info->s->blocksize -1)))
		DBUG_ENTER("chk_index_down");

		/* Key blocks must lay within the key file length entirely. */
		if (page + keyinfo->block_length > info->state->key_file_length)
		{
		/* purecov: begin tested */
		/* Give it a chance to fit in the real file size. */
		my_off_t max_length= my_seek(info->s->kfile, 0L, MY_SEEK_END, MYF(0));
		mi_check_print_error(param,"Wrong pagepointer: %s at page: %s",
		llstr(page,llbuff),llstr(page,llbuff2));

		if (page+info->s->blocksize > max_length)
		mi_check_print_error(param, "Invalid key block position: %s "
		"key block size: %u file_length: %s",
		llstr(page, llbuff), keyinfo->block_length,
		llstr(info->state->key_file_length, llbuff2));
		if (page + keyinfo->block_length > max_length)
		goto err;
		/* Fix the remebered key file length. */
		info->state->key_file_length= (max_length &
		~ (my_off_t) (info->s->blocksize-1));
		~ (my_off_t) (keyinfo->block_length - 1));
		/* purecov: end */
		}

		/* Key blocks must be aligned at MI_MIN_KEY_BLOCK_LENGTH. */
		if (page & (MI_MIN_KEY_BLOCK_LENGTH - 1))
		{
		/* purecov: begin tested */
		mi_check_print_error(param, "Mis-aligned key block: %s "
		"minimum key block length: %u",
		llstr(page, llbuff), MI_MIN_KEY_BLOCK_LENGTH);
		goto err;
		/* purecov: end */
		}

		if (!_mi_fetch_keypage(info,keyinfo,page, DFLT_INIT_HITS,buff,0))
		{
		mi_check_print_error(param,"Can't read key from filepos: %s",
		@@ -577,9 +630,12 @@ static int chk_index_down(MI_CHECK param, MI_INFO info, MI_KEYDEF *keyinfo,
		if (chk_index(param,info,keyinfo,page,buff,keys,key_checksum,level))
		goto err;

		return 0;
		DBUG_RETURN(0);

		/* purecov: begin tested */
		err:
		return 1;
		DBUG_RETURN(1);
		/* purecov: end */
		}