pkg/spec.InitFSMounts: optimize

Instead of getting mount options from /proc/self/mountinfo, which is
very costly to read/parse (and can even be unreliable), let's use
statfs(2) to figure out the flags we need.

[v2: move getting default options to pkg/util, make it linux-specific]

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/pkg/util/mountOpts_other.go b/pkg/util/mountOpts_other.go
new file mode 100644
index 000000000..6a34942e5
--- /dev/null
+++ b/pkg/util/mountOpts_other.go
@@ -0,0 +1,7 @@
+// +build !linux
+
+package util
+
+func getDefaultMountOptions(path string) (opts defaultMountOptions, err error) {
+	return
+}