dump: Save and remove per-thread argumens in parasite

This patch starts using parasite_init_threads_seized and
parasite_fini_threads_seized helpers to save per-thread
data in parasite and remove it on cure procedure.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-dump.c

@@ -1601,7 +1601,7 @@ static int dump_one_task(struct pstree_item *item)
 		goto err;
 	}
 
-	ret = parasite_cure_seized(parasite_ctl);
+	ret = parasite_cure_seized(parasite_ctl, item);
 	if (ret) {
 		pr_err("Can't cure (pid: %d) from parasite\n", pid);
 		goto err;
@@ -1630,7 +1630,7 @@ err_free:
 err_cure:
 	close_cr_fdset(&cr_fdset);
 err_cure_fdset:
-	parasite_cure_seized(parasite_ctl);
+	parasite_cure_seized(parasite_ctl, item);
 	goto err;
 }
 

include/parasite-syscall.h

@@ -45,9 +45,8 @@ extern int parasite_drain_fds_seized(struct parasite_ctl *ctl,
 					int *lfds, struct fd_opts *flags);
 extern int parasite_get_proc_fd_seized(struct parasite_ctl *ctl);
 
-extern int parasite_cure_seized(struct parasite_ctl *ctl);
-
 struct pstree_item;
+extern int parasite_cure_seized(struct parasite_ctl *ctl, struct pstree_item *item);
 extern struct parasite_ctl *parasite_infect_seized(pid_t pid,
 						   struct pstree_item *item,
 						   struct list_head *vma_area_list);

parasite-syscall.c

@@ -726,7 +726,7 @@ int parasite_fini_threads_seized(struct parasite_ctl *ctl, struct pstree_item *i
 	return ret;
 }
 
-int parasite_cure_seized(struct parasite_ctl *ctl)
+int parasite_cure_seized(struct parasite_ctl *ctl, struct pstree_item *item)
 {
 	int ret = 0;
 
@@ -734,6 +734,7 @@ int parasite_cure_seized(struct parasite_ctl *ctl)
 
 	if (ctl->parasite_ip) {
 		ctl->signals_blocked = 0;
+		parasite_fini_threads_seized(ctl, item);
 		parasite_execute(PARASITE_CMD_FINI, ctl);
 	}
 
@@ -865,10 +866,14 @@ struct parasite_ctl *parasite_infect_seized(pid_t pid, struct pstree_item *item,
 		goto err_restore;
 	}
 
+	ret = parasite_init_threads_seized(ctl, item);
+	if (ret)
+		goto err_restore;
+
 	return ctl;
 
 err_restore:
-	parasite_cure_seized(ctl);
+	parasite_cure_seized(ctl, item);
 	return NULL;
 
 err: