[Libguestfs] [PATCH 3/5] virt-make-fs: Fix estimation when making btrfs (RHBZ#816098).
From: "Richard W.M. Jones" <rjones(a)redhat.com>
This also disables data and metadata duplication, which is not very
useful on a constructed filesystem on a virtual disk.
---
tools/virt-make-fs | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/tools/virt-make-fs b/tools/virt-make-fs
index 3938e27..6efa3cd 100755
--- a/tools/virt-make-fs
+++ b/tools/virt-make-fs
@@ -380,6 +380,13 @@ if ($type eq "ntfs") {
$estimate += 4 * 1024 * 1024; # NTFS journal.
}
+if ($type eq "btrfs") {
+ # For BTRFS, the minimum metadata allocation is 256MB, with data
+ # additional to that. Note that we disable data and metadata
+ # duplication below.
+ $estimate += 256 * 1024 * 1024;
+}
+
$estimate *= 1.10; # Add 10%, see above.
# Calculate the output size.
@@ -448,7 +455,11 @@ eval {
print STDERR "creating $type filesystem on $dev ...\n" if $debug;
# Create the filesystem.
- $g->mkfs ($type, $dev);
+ if ($type ne "btrfs") {
+ $g->mkfs ($type, $dev);
+ } else {
+ $g->mkfs_btrfs ([$dev], datatype => "single", metadata =>
"single");
+ }
$g->mount ($dev, "/");
# Copy the data in.
--
1.7.10