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rbd image_read.sh: allocate local file at create time

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Move the dd command that touches the last byte in a local file
into create_image() where it belongs (out of fill_original()).

Signed-off-by: Alex Elder <elder@inktank.com>
This commit is contained in:
Alex Elder 2013-05-21 10:05:03 -05:00
parent 512e907726
commit a6b4847ef2
1 changed files with 4 additions and 7 deletions
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11
qa/workunits/rbd/image_read.sh
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@ -245,11 +245,14 @@ function create_image() {
[ $# -eq 1 ] || exit 99
local image_name="$1"
local image_path
local bytes
verbose "creating image \"${image_name}\""
if [ "${LOCAL_FILES}" = true ]; then
image_path=$(image_dev_path "${image_name}")
touch "${image_path}"
bytes=$(echo "${IMAGE_SIZE} * 1024 * 1024 - 1" | bc)
quiet dd if=/dev/zero bs=1 count=1 seek="${bytes}" \
of="${image_path}"
return
fi
@ -425,18 +428,12 @@ function source_data() {
function fill_original() {
local image_path=$(image_dev_path "${ORIGINAL}")
local bytes=$(echo "${IMAGE_SIZE} * 1024 * 1024 - 1" | bc)
verbose "filling original image"
# Fill 16 objects worth of "random" data
source_data |
quiet dd bs="${PAGE_SIZE}" count=$((16 * OBJECT_PAGES)) \
of="${image_path}"
if [ "${LOCAL_FILES}" = true ]; then
# Extend it another 16 objects, as a hole in the image
quiet dd if=/dev/zero bs=1 count=1 seek=${bytes} \
of="${image_path}"
fi
}
function do_read() {