Commit beced130 authored by Bruce Johnston's avatar Bruce Johnston Committed by Mikulas Patocka
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dm vdo: add upfront validation for logical size 



Add a validation check that the logical size passed via the table line
does not exceed MAXIMUM_VDO_LOGICAL_BLOCKS.

Signed-off-by: default avatarBruce Johnston <bjohnsto@redhat.com>
Reviewed-by: default avatarMatthew Sakai <msakai@redhat.com>
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
parent 2fb98e41

drivers/md/dm-vdo/dm-vdo-target.c

+6 −0
Original line number Diff line number Diff line
@@ -792,6 +792,12 @@ static int parse_device_config(int argc, char **argv, struct dm_target *ti, 
	struct device_config *config = NULL;

	int result;



	if (logical_bytes > (MAXIMUM_VDO_LOGICAL_BLOCKS * VDO_BLOCK_SIZE)) {

		handle_parse_error(config, error_ptr,

				   "Logical size exceeds the maximum");

		return VDO_BAD_CONFIGURATION;

	}



	if ((logical_bytes % VDO_BLOCK_SIZE) != 0) {

		handle_parse_error(config, error_ptr,

				   "Logical size must be a multiple of 4096");