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restore: create pid namespace

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A pid namespace is created if a pid of the first task is 1.

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin
2012-06-19 15:53:00 +04:00
committed by Pavel Emelyanov
parent 83e6d14efd
commit c8e6be95e4
1 changed files with 12 additions and 3 deletions
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15
cr-restore.c
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@@ -521,11 +521,20 @@ static inline int fork_with_pid(struct pstree_item *item, unsigned long ns_clone
goto err_close; goto err_close;
} }
if (write_img_buf(ca.fd, buf, strlen(buf))) /* A process with pid = 1 is "init". It should be restore in new pid ns.
goto err_unlock; * The first process in pid ns gets pid = 1 automaticaly. */
if (pid == 1) {
ca.clone_flags |= CLONE_NEWPID;
if (item != root_item) {
pr_err("Only first task can have pid = 1");
goto err_unlock;
}
} else
if (write_img_buf(ca.fd, buf, strlen(buf)))
goto err_unlock;
ret = clone(restore_task_with_children, stack + STACK_SIZE, ret = clone(restore_task_with_children, stack + STACK_SIZE,
ns_clone_flags | SIGCHLD, &ca); ca.clone_flags | SIGCHLD, &ca);
if (ret < 0) if (ret < 0)
pr_perror("Can't fork for %d", pid); pr_perror("Can't fork for %d", pid);