bool check_ns_proc(struct fd_link *link) { unsigned int i, kid; for (i = 0; i < ARRAY_SIZE(ns_desc_array); i++) { kid = parse_ns_link(link->name + 1, link->len - 1, ns_desc_array[i]); if (!kid) continue; link->ns_d = ns_desc_array[i]; link->ns_kid = kid; return true; } return false; }
static unsigned int get_ns_id(int pid, struct ns_desc *nd) { int proc_dir, ret; unsigned int kid; char ns_path[10], ns_id[32]; proc_dir = open_pid_proc(pid); if (proc_dir < 0) return 0; sprintf(ns_path, "ns/%s", nd->str); ret = readlinkat(proc_dir, ns_path, ns_id, sizeof(ns_id)); if (ret < 0) { pr_perror("Can't readlink ns link"); return 0; } kid = parse_ns_link(ns_id, ret, nd); BUG_ON(!kid); return generate_ns_id(pid, kid, nd); }