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disk: grow root partition while re-layouting

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Instead of growing the root partition in `CreatePartitionTable` do it
as part of `updatePartitionStartPointOffsets`.
This commit is contained in:
Christian Kellner 2021-12-20 14:56:06 +01:00 • committed by Tom Gundersen
parent 16ad1211c3
commit b3c769ae02
2 changed files with 9 additions and 6 deletions
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8
internal/disk/disk.go
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@ -316,6 +316,7 @@ func (pt *PartitionTable) GenerateUUIDs(rng *rand.Rand) {
// Dynamically calculate and update the start point for each of the existing
// partitions. Adjusts the overall size of image to either the supplied
// value in `size` or to the sum of all partitions if that is lager.
// Will grow the root partition if there is any empty space.
// Returns the updated start point.
func (pt *PartitionTable) updatePartitionStartPointOffsets(start, size uint64) uint64 {
var rootIdx = -1
@ -342,6 +343,13 @@ func (pt *PartitionTable) updatePartitionStartPointOffsets(start, size uint64) u
pt.Size = size
}
// If there is space left in the partition table, grow root
root.Size = pt.BytesToSectors(pt.Size) - root.Start
// Finally we shrink the last partition, i.e. the root partition,
// to leave space for the secondary GPT header.
root.Size -= 100
return start
}