This comes from pve-container and will be used in
qemu-server with cloudinit.
---
src/PVE/Tools.pm | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/PVE/Tools.pm b/src/PVE/Tools.pm
index a7bcd35..9b6a3e4 100644
--- a/src/PVE/Tools.pm
+++ b/src/PVE/Tools.pm
@@ -740,6 +740,16 @@ sub next_spice_port {
return next_unused_port(61000, 61099, $family);
}
+sub next_free_nbd_dev {
+ for(my $i = 0;;$i++) {
+ my $dev = "/dev/nbd$i";
+ last if ! -b $dev;
+ next if -f "/sys/block/nbd$i/pid"; # busy
+ return $dev;
+ }
+ die "unable to find free nbd device\n";
+}
+
# NOTE: NFS syscall can't be interrupted, so alarm does
# not work to provide timeouts.
# from 'man nfs': "Only SIGKILL can interrupt a pending NFS operation"
--
2.1.4
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