X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Fmount-setup.c;h=e86a89321e91c169af1afe57b1f7a48d07d035f1;hp=c10c6dad1c853f5c4fe3f4310a01de2ebfd7be30;hb=b3ac5f8cb98757416d8660023d6564a7c411f0a0;hpb=86fc77c47f2d22cd01d0871866869cb194af0884;ds=sidebyside

diff --git a/src/core/mount-setup.c b/src/core/mount-setup.c
index c10c6dad1..e86a89321 100644
--- a/src/core/mount-setup.c
+++ b/src/core/mount-setup.c
@@ -400,6 +400,15 @@ int mount_setup(bool loaded_policy) {
          * udevd. */
         dev_setup();
 
+        /* Mark the root directory as shared in regards to mount
+         * propagation. The kernel defaults to "private", but we think
+         * it makes more sense to have a default of "shared" so that
+         * nspawn and the container tools work out of the box. If
+         * specific setups need other settings they can reset the
+         * propagation mode to private if needed. */
+        if (mount(NULL, "/", NULL, MS_REC|MS_SHARED, NULL) < 0)
+                log_warning("Failed to set up the root directory for shared mount propagation: %m");
+
         /* Create a few directories we always want around */
         mkdir_label("/run/systemd", 0755);
         mkdir_label("/run/systemd/system", 0755);