From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
Date: Tue, 30 Mar 2010 23:14:53 -0700
Subject: [PATCH 2/2] Add keep_frozen field to struct app_restart_args
Add a field, keep_frozen that callers of app_restart() can use to leave the
application frozen after restart. When this field is set, have app_restart()
set the RESTART_FROZEN flag to sys_restart().
TODO:
For now, this field will be used in LXC containers. A follow-on
patch would add a command line option to /bin/restart to let users
select this behavior.
---
app-checkpoint.h | 3 +++
restart.c | 2 +-
2 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/app-checkpoint.h b/app-checkpoint.h
index f740085..d2455f3 100644
--- a/app-checkpoint.h
+++ b/app-checkpoint.h
@@ -1,3 +1,5 @@
+#include <linux/checkpoint.h>
+#include <linux/checkpoint_hdr.h>
struct app_checkpoint_args {
int outfd;
@@ -19,6 +21,7 @@ struct app_restart_args {
int show_status;
int copy_status;
char *freezer;
+ int keep_frozen;
int infd;
int klogfd;
int ulogfd;
diff --git a/restart.c b/restart.c
index 5408152..d5fee0b 100644
--- a/restart.c
+++ b/restart.c
@@ -914,7 +914,7 @@ static int ckpt_coordinator(struct ckpt_ctx *ctx)
if (ckpt_probe_child(root_pid, "root task") < 0)
exit(1);
- if (ctx->args->freezer)
+ if (ctx->args->freezer || ctx->args->keep_frozen)
flags |= RESTART_FROZEN;
if (ctx->args->keep_lsm)
flags |= RESTART_KEEP_LSM;
--
1.6.6.1
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