Messages in this thread Patch in this message | | | From | Andrey Mirkin <> | Subject | [PATCH 1/9] Introduce trivial sys_checkpoint and sys_restore system calls | Date | Wed, 3 Sep 2008 14:57:48 +0400 |
| |
Right now they just return -ENOSYS. Later they will provide functionality to checkpoint and restart a container.
Both syscalls take as arguments a file descriptor and flags. Also sys_checkpoint take as the first argument a PID of container's init (later it will be container ID); sys_restart takes as the first argument a container ID (right now it will not be used).
Signed-off-by: Andrey Mirkin <major@openvz.org> --- Makefile | 2 +- arch/x86/kernel/syscall_table_32.S | 2 + cpt/Makefile | 1 + cpt/sys_core.c | 38 ++++++++++++++++++++++++++++++++++++ include/asm-x86/unistd_32.h | 2 + 5 files changed, 44 insertions(+), 1 deletions(-) create mode 100644 cpt/Makefile create mode 100644 cpt/sys_core.c
diff --git a/Makefile b/Makefile index ea413fa..1dee5c0 100644 --- a/Makefile +++ b/Makefile @@ -619,7 +619,7 @@ 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/ cpt/ 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 fd9d4f4..4a0d7fb 100644 --- a/arch/x86/kernel/syscall_table_32.S +++ b/arch/x86/kernel/syscall_table_32.S @@ -333,3 +333,5 @@ ENTRY(sys_call_table) .long sys_pipe2 .long sys_inotify_init1 .long sys_hijack + .long sys_checkpoint + .long sys_restart /* 335 */ diff --git a/cpt/Makefile b/cpt/Makefile new file mode 100644 index 0000000..2276fb1 --- /dev/null +++ b/cpt/Makefile @@ -0,0 +1 @@ +obj-y += sys_core.o diff --git a/cpt/sys_core.c b/cpt/sys_core.c new file mode 100644 index 0000000..1a97fb6 --- /dev/null +++ b/cpt/sys_core.c @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2008 Parallels, Inc. + * + * Author: Andrey Mirkin <major@openvz.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2 of the + * License. + * + */ + +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/file.h> + +/** + * sys_checkpoint - checkpoint a container from outside + * @pid: pid of the container init(1) process + * TODO: should switch to container id later + * @fd: file to which save the checkpoint image + * @flags: checkpoint operation flags + */ +asmlinkage long sys_checkpoint(pid_t pid, int fd, unsigned long flags) +{ + return -ENOSYS; +} + +/** + * sys_restart - restart a container + * @ctid: container id which should be used to restart a container + * @fd: file from which read the checkpoint image + * @flags: restart operation flags + */ +asmlinkage long sys_restart(int ctid, int fd, unsigned long flags) +{ + return -ENOSYS; +} diff --git a/include/asm-x86/unistd_32.h b/include/asm-x86/unistd_32.h index 70280da..1a09604 100644 --- a/include/asm-x86/unistd_32.h +++ b/include/asm-x86/unistd_32.h @@ -339,6 +339,8 @@ #define __NR_pipe2 331 #define __NR_inotify_init1 332 #define __NR_hijack 333 +#define __NR_checkpoint 334 +#define __NR_restart 335 #ifdef __KERNEL__ -- 1.5.6
| |