From: Sukadev Bhattiprolu <[email protected]>
Date: Thu, 4 Mar 2010 21:51:27 -0800
Subject: [PATCH 07/14][user-cr] Create app-checkpoint.h
Create a new header file, app-checkpoint.h that can be used to export
the app_checkpoint() and app_restart() functionality to other users
(such as LXC).
For now, leave 'global_send_sigint' as an external variable. We should
eventually implement an API that gives callers better control of how
to handle signals during restart.
Changelog[v2]:
- (In response to Oren Laadan's comment): Leave 'global_send_sigint'
as an extern and add a TODO to remove later.
Signed-off-by: Sukadev Bhattiprolu <[email protected]>
---
Makefile | 2 +-
app-checkpoint.h | 42 ++++++++++++++++++++++++++++++++++++++++++
checkpoint.c | 9 +--------
restart.c | 31 +++++++------------------------
4 files changed, 51 insertions(+), 33 deletions(-)
create mode 100644 app-checkpoint.h
diff --git a/Makefile b/Makefile
index 406f685..639d42f 100644
--- a/Makefile
+++ b/Makefile
@@ -52,7 +52,7 @@ $(LIB_ECLONE):
# restart needs to be thread-safe
restart: CFLAGS += -D__REENTRANT -pthread
-$(CR_OBJS): common.h
+$(CR_OBJS): common.h app-checkpoint.h
# eclone() is architecture specific
ifneq ($(SUBARCH),)
diff --git a/app-checkpoint.h b/app-checkpoint.h
new file mode 100644
index 0000000..f740085
--- /dev/null
+++ b/app-checkpoint.h
@@ -0,0 +1,42 @@
+
+struct app_checkpoint_args {
+ int outfd;
+ int logfd;
+ int uerrfd;
+ int container;
+ int verbose;
+};
+
+struct app_restart_args {
+ int self;
+ int pids;
+ int pidns;
+ int inspect;
+ char *root;
+ int wait;
+ int mntns;
+ int mnt_pty;
+ int show_status;
+ int copy_status;
+ char *freezer;
+ int infd;
+ int klogfd;
+ int ulogfd;
+ int uerrfd;
+ long warn;
+ int debug;
+ int verbose;
+ long fail;
+ int keep_lsm;
+};
+
+/*
+ * TODO: Implement an API to let callers choose if/how an interrupt be sent
+ * and remove global_send_sigint.
+ */
+extern int global_send_sigint;
+
+extern int app_checkpoint(int pid, unsigned long flags,
+ struct app_checkpoint_args *args);
+
+extern int app_restart(struct app_restart_args *args);
diff --git a/checkpoint.c b/checkpoint.c
index 6e91149..291cb36 100644
--- a/checkpoint.c
+++ b/checkpoint.c
@@ -21,6 +21,7 @@
#include <linux/checkpoint.h>
+#include "app-checkpoint.h"
#include "common.h"
static char usage_str[] =
@@ -44,14 +45,6 @@ static char usage_str[] =
static int global_uerrfd = -1;
-struct app_checkpoint_args {
- int outfd;
- int logfd;
- int uerrfd;
- int container;
- int verbose;
-};
-
inline static int checkpoint(pid_t pid, int fd, unsigned long flags, int logfd)
{
return syscall(__NR_checkpoint, pid, fd, flags, logfd);
diff --git a/restart.c b/restart.c
index 7c9db80..bbc5ef3 100644
--- a/restart.c
+++ b/restart.c
@@ -40,6 +40,7 @@
#include "eclone.h"
#include "genstack.h"
#include "compat.h"
+#include "app-checkpoint.h"
#include "common.h"
static char usage_str[] =
@@ -216,9 +217,14 @@ static int global_verbose;
static pid_t global_child_pid;
static int global_child_status;
static int global_child_collected;
-static int global_send_sigint = -1;
static int global_sent_sigint;
+/*
+ * TODO: Implement an API to let callers choose if/how an interrupt be sent
+ * and remove global_send_sigint.
+ */
+int global_send_sigint = -1;
+
static int ckpt_remount_proc(struct ckpt_ctx *ctx);
static int ckpt_remount_devpts(struct ckpt_ctx *ctx);
@@ -279,29 +285,6 @@ struct pid_swap {
pid_t new;
};
-struct app_restart_args {
- int self;
- int pids;
- int pidns;
- int inspect;
- char *root;
- int wait;
- int mntns;
- int mnt_pty;
- int show_status;
- int copy_status;
- char *freezer;
- int infd;
- int klogfd;
- int ulogfd;
- int uerrfd;
- long warn;
- int debug;
- int verbose;
- long fail;
- int keep_lsm;
-};
-
static void usage(char *str)
{
ckpt_err("%s", str);
--
1.6.0.4
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