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-rw-r--r--passt.110
1 files changed, 10 insertions, 0 deletions
diff --git a/passt.1 b/passt.1
index e9fe07f..a8a0631 100644
--- a/passt.1
+++ b/passt.1
@@ -394,6 +394,16 @@ default route, or if there is no default route, for any of the enabled address
families.
.TP
+.BR \-\-chroot-fallback
+Enable fallback to chroot() in case pivot_root(), used to switch to an empty
+filesystem for stricter isolation, returns an error. Useful for integrations
+which use tmpfs or initramfs as root filesystem, where pivot_root() can't be
+used, as it results in an invalid argument error (EINVAL).
+
+By default, the fallback is disabled. If pivot_root() fails, then the entire
+sandboxing process fails.
+
+.TP
.BR \-\-map-guest-addr " " \fIaddr
Translate \fIaddr\fR in the guest to be equal to the guest's assigned
address on the host. That is, packets from the guest to \fIaddr\fR