[Devel] [RFC][PATCH 1/2] CR: introduce sys_checkpoint and sys_restore

[Oren Laadan]

Create trivial sys_checkpoint and sys_restore system calls. They will
enable to checkpoint and restart an entire container, to and from a
checkpoint image file.

First create a template for both syscalls: they take a file descriptor
(for the image file) and flags as arguments. For sys_checkpoint the
first argument identifies the target container; for sys_restart it will
identify the checkpoint image.

Signed-off-by: Oren Laadan <orenl at cs.columbia.edu>

---
  Makefile                           |    2 +-
  arch/x86/kernel/syscall_table_32.S |    2 ++
  include/asm-x86/unistd_32.h        |    2 ++
  3 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/Makefile b/Makefile
index 4bcd1cf..6e2334c 100644
--- a/Makefile
+++ b/Makefile
@@ -611,7 +611,7 @@ export mod_strip_cmd


  ifeq ($(KBUILD_EXTMOD),)
-core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
+core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/ ckpt/

  vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
diff --git a/arch/x86/kernel/syscall_table_32.S b/arch/x86/kernel/syscall_table_32.S
index d44395f..5543136 100644
--- a/arch/x86/kernel/syscall_table_32.S
+++ b/arch/x86/kernel/syscall_table_32.S
@@ -332,3 +332,5 @@ ENTRY(sys_call_table)
  	.long sys_dup3			/* 330 */
  	.long sys_pipe2
  	.long sys_inotify_init1
+	.long sys_checkpoint
+	.long sys_restart
diff --git a/include/asm-x86/unistd_32.h b/include/asm-x86/unistd_32.h
index d739467..88bdec4 100644
--- a/include/asm-x86/unistd_32.h
+++ b/include/asm-x86/unistd_32.h
@@ -338,6 +338,8 @@
  #define __NR_dup3		330
  #define __NR_pipe2		331
  #define __NR_inotify_init1	332
+#define __NR_checkpoint		333
+#define __NR_restart		334

  #ifdef __KERNEL__

-- 
1.5.4.3

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