[CRIU] [PATCH v6 11/13] mount: copy private field to "bind mount" mount_info structure

[Stanislav Kinsburskiy]

Mount private field can be initialized on actual mount operation, and then
used later with a bind-mount.
Thus, if have to be copied.

Signed-off-by: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
---
 mount.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mount.c b/mount.c
index a85b5c0..e66d63a 100644
--- a/mount.c
+++ b/mount.c
@@ -2314,6 +2314,13 @@ static int do_bind_mount(struct mount_info *mi)
 	master = mi->master_id && mi->master_id == mi->bind->master_id;
 	cut_root = cut_root_for_bind(mi->root, mi->bind->root);
 
+	/* Mount private can be initialized on mount() callback, which is
+	 * called only once.
+	 * It have to be copied to all it's sibling structures to provide users
+	 * of it with actual data.
+	 */
+	mi->private = mi->bind->private;
+
 	if (list_empty(&mi->bind->children))
 		mnt_path = mi->bind->mountpoint;
 	else {