md/dm-vdo/encodings.c

636  * @partition: The slab depot partition
647 int vdo_configure_slab_depot(const struct partition *partition,
657 		      __func__, (unsigned long long) partition->count,
658 		      (unsigned long long) partition->offset,
662 	slab_count = (partition->count / slab_size);
671 	last_block = partition->offset + total_slab_blocks;
675 		.first_block = partition->offset,
683 		      (unsigned long long) (partition->count - (last_block - partition->offset)));
773  * allocate_partition() - Allocate a partition and add it to a layout.
774  * @layout: The layout containing the partition.
775  * @id: The id of the partition.
776  * @offset: The offset into the layout at which the partition begins.
777  * @size: The size of the partition in blocks.
784 	struct partition *partition;
787 	result = vdo_allocate(1, struct partition, __func__, &partition);
791 	partition->id = id;
792 	partition->offset = offset;
793 	partition->count = size;
794 	partition->next = layout->head;
795 	layout->head = partition;
801  * make_partition() - Create a new partition from the beginning or end of the unused space in a
804  * @id: The id of the partition to make.
806  * @beginning: True if the partition should start at the beginning of the unused space.
849  * @block_map_blocks: The size of the block map partition.
850  * @journal_blocks: The size of the journal partition.
851  * @summary_blocks: The size of the slab summary partition.
913 		struct partition *part = layout->head;
923  * vdo_get_partition() - Get a partition by id.
924  * @layout: The layout from which to get a partition.
925  * @id: The id of the partition.
926  * @partition_ptr: A pointer to hold the partition.
931 		      struct partition **partition_ptr)
933 	struct partition *partition;
935 	for (partition = layout->head; partition != NULL; partition = partition->next) {
936 		if (partition->id == id) {
938 				*partition_ptr = partition;
947  * vdo_get_known_partition() - Get a partition by id from a validated layout.
948  * @layout: The layout from which to get a partition.
949  * @id: The id of the partition.
951  * Return: the partition
953 struct partition *vdo_get_known_partition(struct layout *layout, enum partition_id id)
955 	struct partition *partition;
956 	int result = vdo_get_partition(layout, id, &partition);
958 	VDO_ASSERT_LOG_ONLY(result == VDO_SUCCESS, "layout has expected partition: %u", id);
960 	return partition;
965 	const struct partition *partition;
971 			    "layout partition count must fit in a byte");
983 	for (partition = layout->head; partition != NULL; partition = partition->next) {
984 		buffer[(*offset)++] = partition->id;
985 		encode_u64_le(buffer, offset, partition->offset);
988 		encode_u64_le(buffer, offset, partition->count);
1000 	struct partition *partition;
1057 		result = vdo_get_partition(layout, REQUIRED_PARTITIONS[i], &partition);
1061 						      "layout is missing required partition %u",
1065 		start += partition->count;