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ns: Introduce ns type

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We (may) have 3 types of namespace objects in criu -- criu's one,
root task's one and others. All of them sometimes make sense and
we differentiate them in a weird way -- by checking the ns->pid
field against getpid() or by comparing with root_item's.

The proposal is to mark ns_id objects explicitly with type field.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov 2015-09-18 17:03:39 +03:00
parent 1c34b284f3
commit 22b7256612
3 changed files with 28 additions and 6 deletions
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10
include/namespaces.h
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@ -9,12 +9,20 @@ struct ns_desc {
size_t len;
};
enum ns_type {
NS_UNKNOWN = 0,
NS_CRIU,
NS_ROOT,
NS_OTHER,
};
struct ns_id {
unsigned int kid;
unsigned int id;
pid_t pid;
struct ns_desc *nd;
struct ns_id *next;
enum ns_type type;
/*
* For mount namespaces on restore -- indicates that
@ -68,7 +76,7 @@ extern int restore_ns(int rst, struct ns_desc *nd);
extern int dump_task_ns_ids(struct pstree_item *);
extern int predump_task_ns_ids(struct pstree_item *);
extern struct ns_id *rst_new_ns_id(unsigned int id, pid_t pid, struct ns_desc *nd);
extern int rst_add_ns_id(unsigned int id, pid_t pid, struct ns_desc *nd);
extern int rst_add_ns_id(unsigned int id, struct pstree_item *, struct ns_desc *nd);
extern struct ns_id *lookup_ns_by_id(unsigned int id, struct ns_desc *nd);
extern int collect_user_namespaces(bool for_dump);