criu/include/cgroup.h

#ifndef __CR_CGROUP_H__
#define __CR_CGROUP_H__
#include "asm/int.h"
struct pstree_item;
extern u32 root_cg_set;
int dump_task_cgroup(struct pstree_item *, u32 *);
int dump_cgroups(void);
int prepare_task_cgroup(struct pstree_item *);
int prepare_cgroup(void);
void fini_cgroup(void);
#endif /* __CR_CGROUP_H__ */
cg: Skeleton for cgroup code Signed-off-by: Pavel Emelyanov <xemul@parallels.com> 2014-05-08 16:37:00 +04:00			`#ifndef __CR_CGROUP_H__`
			`#define __CR_CGROUP_H__`
			`#include "asm/int.h"`
cg: Dump cgroups tasks live in Each task points to a single ID of cgroup-set it lives in. This is done so to save some space in the image, as tasks likely live in the same set of cgroups. Other than this we keep track of what cgroup set we dump the subtree from. If it happens, that root task lives in the same cgroup set as criu does, we don't allow for any other sub-cgroups and make restore (next patch) much simpler and faster. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> 2014-05-08 16:42:40 +04:00			`struct pstree_item;`
cg: Restore tasks into proper cgroups On restore find out in which sets tasks live in and move them there. Optimization note -- move tasks into cgroups _before_ fork kids to make them inherit cgroups if required. This saves a lot of time. Accessibility note -- when moving tasks into cgroups don't search for existing host mounts (they may be not available) and don't mount temporary ones (may be impossible due to user namespaces). Instead introduce service fd with a yard of mounts. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> 2014-05-08 16:55:53 +04:00			`extern u32 root_cg_set;`
cg: Dump cgroups tasks live in Each task points to a single ID of cgroup-set it lives in. This is done so to save some space in the image, as tasks likely live in the same set of cgroups. Other than this we keep track of what cgroup set we dump the subtree from. If it happens, that root task lives in the same cgroup set as criu does, we don't allow for any other sub-cgroups and make restore (next patch) much simpler and faster. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> 2014-05-08 16:42:40 +04:00			`int dump_task_cgroup(struct pstree_item , u32 );`
			`int dump_cgroups(void);`
cg: Restore tasks into proper cgroups On restore find out in which sets tasks live in and move them there. Optimization note -- move tasks into cgroups _before_ fork kids to make them inherit cgroups if required. This saves a lot of time. Accessibility note -- when moving tasks into cgroups don't search for existing host mounts (they may be not available) and don't mount temporary ones (may be impossible due to user namespaces). Instead introduce service fd with a yard of mounts. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> 2014-05-08 16:55:53 +04:00			`int prepare_task_cgroup(struct pstree_item *);`
			`int prepare_cgroup(void);`
			`void fini_cgroup(void);`
cg: Skeleton for cgroup code Signed-off-by: Pavel Emelyanov <xemul@parallels.com> 2014-05-08 16:37:00 +04:00			`#endif /* __CR_CGROUP_H__ */`