With the rootdir option we try to guess the final size of the image and
fill it with zeros, preceded by truncation. After patch
"Btrfs-progs: Do not force mixed block group creation unless '-M' option
is specified"
the misc test 002 will fail, because of the non-mixed mode. I think we
should not touch the image size (no change for block devices) and try to
fit into whatever is provided by user.
Signed-off-by: David Sterba <dsterba@suse.com>
static int open_target(char *output_name)
{
int output_fd;
- output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC,
+ output_fd = open(output_name, O_CREAT | O_RDWR,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
return output_fd;
--- /dev/null
+#!/bin/bash
+# make sure that mkfs.btrfs --rootsize does not change size of the image
+
+source $TOP/tests/common
+
+check_prereq mkfs.btrfs
+prepare_test_dev
+
+test_mkfs_with_size() {
+ local size
+ local imgsize
+ local tmp
+
+ size="$1"
+ run_check truncate -s$size $TEST_DEV
+ imgsize=$(run_check_stdout stat --format=%s $TEST_DEV)
+ run_check $SUDO_HELPER $TOP/mkfs.btrfs -f \
+ --rootdir $TOP/Documentation \
+ $TEST_DEV
+ tmp=$(run_check_stdout stat --format=%s $TEST_DEV)
+ if ! [ "$imgsize" = "$tmp" ]; then
+ _fail "image size changed from $imgsize to $tmp"
+ fi
+}
+
+test_mkfs_with_size 128M
+test_mkfs_with_size 256M
+test_mkfs_with_size 512M
+test_mkfs_with_size 1G
+test_mkfs_with_size 2G