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criu/include/namespaces.h

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crtools: Namespaces support skeleton New option -n to dump/restore namespaces. Fork the namespaces dumping task and write a helper for switching a namespace. Prepare the restorer code for restoring namespaces before root task. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
2012-01-26 15:27:00 +04:00
#ifndef __CR_NS_H__
#define __CR_NS_H__
namespaces: dump_namespaces get a struct pid as argument It uses pid for create image file and real_pid for dumping ns-s. Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2012-06-19 15:53:00 +04:00
#include "crtools.h"
pstree: Move struct pid to pstree.h I believe this make sense to keep this structure in pstree.h where pstree related data lives. Also I've added some comments on struct pid members. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2012-10-08 18:59:36 +04:00
#include "pstree.h"
ns: Add c/r for /proc/$pid/ns/$ids references Based on work done by Cyrill Corcunov (many thanks for that). In this commit we implement c/r for files which have opened /proc/$pid/ns/$ids entries. The idea is rather simple one Checkpoint ========== - Check if the file name is the one of known to be ns ref - If match then write protobuf entry Restore ======= - Read all ns entries from the image - When criu tries to open one we lookup over process tree to figure out which PID should be used in path and then just open it Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-18 04:00:05 +04:00
#include "files.h"
namespaces: dump_namespaces get a struct pid as argument It uses pid for create image file and real_pid for dumping ns-s. Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2012-06-19 15:53:00 +04:00
ns: Introduce ns descriptors These are structs that (now) tie together ns string and the CLONE_ flag. It's nice to have one (some code becomes simpler) and will help us with auto-namespaces detection. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-01-15 23:24:01 +04:00
struct ns_desc {
ns: Beautify namespaces.h I'll need to modify this header so before anything else lets beautify it - drop struct pstree_item declaration it's already in pstree.h - move struct cr_options to top - align members of struct ns_desc - move externs to top - add argument name to try_show_namespaces Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-15 00:37:44 +04:00
unsigned int cflag;
char *str;
ns: Extend ns_desc to carry the length of the ns name This will be needed for fast parsing of procfs ns references. [ xemul: Add user_ns_desc here ] Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-20 13:30:17 +04:00
size_t len;
ns: Introduce ns descriptors These are structs that (now) tie together ns string and the CLONE_ flag. It's nice to have one (some code becomes simpler) and will help us with auto-namespaces detection. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-01-15 23:24:01 +04:00
};
ns: Extend ns_desc to carry the length of the ns name This will be needed for fast parsing of procfs ns references. [ xemul: Add user_ns_desc here ] Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-20 13:30:17 +04:00
#define NS_DESC_ENTRY(_cflag, _str) \
{ \
.cflag = _cflag, \
.str = _str, \
.len = sizeof(_str) - 1, \
}
ns: Add c/r for /proc/$pid/ns/$ids references Based on work done by Cyrill Corcunov (many thanks for that). In this commit we implement c/r for files which have opened /proc/$pid/ns/$ids entries. The idea is rather simple one Checkpoint ========== - Check if the file name is the one of known to be ns ref - If match then write protobuf entry Restore ======= - Read all ns entries from the image - When criu tries to open one we lookup over process tree to figure out which PID should be used in path and then just open it Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-18 04:00:05 +04:00
extern bool check_ns_proc(struct fd_link *link);
ns: Beautify namespaces.h I'll need to modify this header so before anything else lets beautify it - drop struct pstree_item declaration it's already in pstree.h - move struct cr_options to top - align members of struct ns_desc - move externs to top - add argument name to try_show_namespaces Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-15 00:37:44 +04:00
extern struct ns_desc pid_ns_desc;
ns: Extend ns_desc to carry the length of the ns name This will be needed for fast parsing of procfs ns references. [ xemul: Add user_ns_desc here ] Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-20 13:30:17 +04:00
extern struct ns_desc user_ns_desc;
ns: Beautify namespaces.h I'll need to modify this header so before anything else lets beautify it - drop struct pstree_item declaration it's already in pstree.h - move struct cr_options to top - align members of struct ns_desc - move externs to top - add argument name to try_show_namespaces Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-15 00:37:44 +04:00
extern unsigned long current_ns_mask;
ns: Add c/r for /proc/$pid/ns/$ids references Based on work done by Cyrill Corcunov (many thanks for that). In this commit we implement c/r for files which have opened /proc/$pid/ns/$ids entries. The idea is rather simple one Checkpoint ========== - Check if the file name is the one of known to be ns ref - If match then write protobuf entry Restore ======= - Read all ns entries from the image - When criu tries to open one we lookup over process tree to figure out which PID should be used in path and then just open it Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-18 04:00:05 +04:00
extern int dump_ns_file(struct fd_parms *p, int lfd, const int fdinfo);
extern int collect_ns_files(void);
ns: Beautify namespaces.h I'll need to modify this header so before anything else lets beautify it - drop struct pstree_item declaration it's already in pstree.h - move struct cr_options to top - align members of struct ns_desc - move externs to top - add argument name to try_show_namespaces Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-15 00:37:44 +04:00
int dump_namespaces(struct pid *pid, unsigned int ns_flags);
int prepare_namespace(int pid, unsigned long clone_flags);
crtools: Get rid of on-stack cr_options We have global instance of them, that's enough. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-28 21:11:13 +04:00
int try_show_namespaces(int pid);
ns: Beautify namespaces.h I'll need to modify this header so before anything else lets beautify it - drop struct pstree_item declaration it's already in pstree.h - move struct cr_options to top - align members of struct ns_desc - move externs to top - add argument name to try_show_namespaces Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-05-15 00:37:44 +04:00
ns: Introduce ns descriptors These are structs that (now) tie together ns string and the CLONE_ flag. It's nice to have one (some code becomes simpler) and will help us with auto-namespaces detection. Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-01-15 23:24:01 +04:00
int switch_ns(int pid, struct ns_desc *nd, int *rst);
int restore_ns(int rst, struct ns_desc *nd);
headers: Unify include guards (in comments) and a few fixes - fix names in comments - add empty lines where needed - fix rbtree.h - fix syscall-types.h Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2012-12-25 22:40:24 +04:00
core: Save tasks' namespaces IDs in the ids image The recent kernels allow to get namespaces IDs by reading proc-ns links. Use this to generate IDs for tasks' namespaces (I do generate them, since IDs provided by kernel look ugly :( ). Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2013-01-18 13:18:33 +04:00
int dump_task_ns_ids(struct pstree_item *);
headers: Unify include guards (in comments) and a few fixes - fix names in comments - add empty lines where needed - fix rbtree.h - fix syscall-types.h Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2012-12-25 22:40:24 +04:00
#endif /* __CR_NS_H__ */
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