mirror of
https://github.com/checkpoint-restore/criu
synced 2025-08-22 09:58:09 +00:00
94f6c87c9f
The motivation for this is to be able to restore containers into cgroups other than what they were dumped in (if, e.g. they might conflict with an existing container). Suppose you have a container in: memory:/mycontainer cpuacct,cpu:/mycontainer blkio:/mycontainer name=systemd:/mycontainer You could then restore them to /mycontainer2 via --cgroup-root /mycontainer2. If you want to restore different controllers to different paths, you can provide multiple arguments, for example, passing: --cgroup-root /mycontainer2 --cgroup-root cpuacct,cpu:/specialcpu \ --cgroup-root name=systemd:/specialsystemd Would result in things being restored to: memory:/mycontainer2 cpuacct,cpu:/specialcpu blkio:/mycontainer2 name=systemd:/specialsystemd i.e. a --cgroup-root without a controller prefix specifies the new default root for all cgroups. Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
#ifndef __CR_CGROUP_H__
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#define __CR_CGROUP_H__
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#include "asm/int.h"
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struct pstree_item;
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extern u32 root_cg_set;
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int dump_task_cgroup(struct pstree_item *, u32 *);
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int dump_cgroups(void);
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int prepare_task_cgroup(struct pstree_item *);
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int prepare_cgroup(void);
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/* Restore things like cpu_limit in known cgroups. */
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int prepare_cgroup_properties(void);
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void fini_cgroup(void);
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struct cg_controller;
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struct cgroup_prop {
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char *name;
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char *value;
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struct list_head list;
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};
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/* This describes a particular cgroup path, e.g. the '/lxc/u1' part of
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* 'blkio/lxc/u1' and any properties it has.
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*/
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struct cgroup_dir {
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char *path;
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struct list_head properties;
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unsigned int n_properties;
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/* this is how children are linked together */
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struct list_head siblings;
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/* more cgroup_dirs */
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struct list_head children;
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unsigned int n_children;
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};
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/* This describes a particular cgroup controller, e.g. blkio or cpuset.
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* The heads are subdirectories organized in their tree format.
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*/
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struct cg_controller {
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int heirarchy;
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unsigned int n_controllers;
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char **controllers;
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/* cgroup_dirs */
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struct list_head heads;
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unsigned int n_heads;
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/* for cgroup list in cgroup.c */
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struct list_head l;
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};
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struct cg_controller *new_controller(const char *name, int heirarchy);
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/* parse all global cgroup information into structures */
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int parse_cg_info(void);
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int new_cg_root_add(char *controller, char *newroot);
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#endif /* __CR_CGROUP_H__ */
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