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)));
786  * allocate_partition() - Allocate a partition and add it to a layout.
787  * @layout: The layout containing the partition.
788  * @id: The id of the partition.
789  * @offset: The offset into the layout at which the partition begins.
790  * @size: The size of the partition in blocks.
797 	struct partition *partition;
800 	result = vdo_allocate(1, struct partition, __func__, &partition);
804 	partition->id = id;
805 	partition->offset = offset;
806 	partition->count = size;
807 	partition->next = layout->head;
808 	layout->head = partition;
814  * make_partition() - Create a new partition from the beginning or end of the unused space in a
817  * @id: The id of the partition to make.
819  * @beginning: True if the partition should start at the beginning of the unused space.
862  * @block_map_blocks: The size of the block map partition.
863  * @journal_blocks: The size of the journal partition.
864  * @summary_blocks: The size of the slab summary partition.
926 		struct partition *part = layout->head;
936  * vdo_get_partition() - Get a partition by id.
937  * @layout: The layout from which to get a partition.
938  * @id: The id of the partition.
939  * @partition_ptr: A pointer to hold the partition.
944 		      struct partition **partition_ptr)
946 	struct partition *partition;
948 	for (partition = layout->head; partition != NULL; partition = partition->next) {
949 		if (partition->id == id) {
951 				*partition_ptr = partition;
960  * vdo_get_known_partition() - Get a partition by id from a validated layout.
961  * @layout: The layout from which to get a partition.
962  * @id: The id of the partition.
964  * Return: the partition
966 struct partition *vdo_get_known_partition(struct layout *layout, enum partition_id id)
968 	struct partition *partition;
969 	int result = vdo_get_partition(layout, id, &partition);
971 	VDO_ASSERT_LOG_ONLY(result == VDO_SUCCESS, "layout has expected partition: %u", id);
973 	return partition;
978 	const struct partition *partition;
984 			    "layout partition count must fit in a byte");
996 	for (partition = layout->head; partition != NULL; partition = partition->next) {
997 		buffer[(*offset)++] = partition->id;
998 		encode_u64_le(buffer, offset, partition->offset);
1001 		encode_u64_le(buffer, offset, partition->count);
1013 	struct partition *partition;
1070 		result = vdo_get_partition(layout, REQUIRED_PARTITIONS[i], &partition);
1074 						      "layout is missing required partition %u",
1078 		start += partition->count;