diff options
Diffstat (limited to 'meta-openembedded/meta-oe/classes/image_types_sparse.bbclass')
| -rw-r--r-- | meta-openembedded/meta-oe/classes/image_types_sparse.bbclass | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/meta-openembedded/meta-oe/classes/image_types_sparse.bbclass b/meta-openembedded/meta-oe/classes/image_types_sparse.bbclass index 4263593a8d..69e24cbb79 100644 --- a/meta-openembedded/meta-oe/classes/image_types_sparse.bbclass +++ b/meta-openembedded/meta-oe/classes/image_types_sparse.bbclass @@ -1,8 +1,16 @@ inherit image_types +# This sets the granularity of the sparse image conversion. Chunk sizes will be +# specified in units of this value. Setting this value smaller than the +# underlying image's block size will not result in any further space saving. +# However, there is no loss in correctness if this value is larger or smaller +# than optimal. This value should be a power of two. +SPARSE_BLOCK_SIZE ??= "4096" + CONVERSIONTYPES += "sparse" -CONVERSION_CMD:sparse = " \ - img2simg "${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}" \ - "${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}.sparse" \ -" +CONVERSION_CMD:sparse() { + INPUT="${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}" + truncate --no-create --size=%${SPARSE_BLOCK_SIZE} "$INPUT" + img2simg -s "$INPUT" "$INPUT.sparse" ${SPARSE_BLOCK_SIZE} +} CONVERSION_DEPENDS_sparse = "android-tools-native" |