129 		struct unix_sock *u = unix_sk(s);  in unix_inflight()  local
131 		if (atomic_long_inc_return(&u->inflight) == 1) {  in unix_inflight()
132 			BUG_ON(!list_empty(&u->link));  in unix_inflight()
133 			list_add_tail(&u->link, &gc_inflight_list);  in unix_inflight()
135 			BUG_ON(list_empty(&u->link));  in unix_inflight()
146 		struct unix_sock *u = unix_sk(s);  in unix_notinflight()  local
148 		BUG_ON(list_empty(&u->link));  in unix_notinflight()
149 		if (atomic_long_dec_and_test(&u->inflight))  in unix_notinflight()
150 			list_del_init(&u->link);  in unix_notinflight()
181 					struct unix_sock *u = unix_sk(sk);  in scan_inflight()  local
188 					if (test_bit(UNIX_GC_CANDIDATE, &u->gc_flags)) {  in scan_inflight()
190 						func(u);  in scan_inflight()
211 		struct unix_sock *u;  in scan_children()  local
220 			u = unix_sk(skb->sk);  in scan_children()
226 			BUG_ON(!list_empty(&u->link));  in scan_children()
227 			list_add_tail(&u->link, &embryos);  in scan_children()
232 			u = list_entry(embryos.next, struct unix_sock, link);  in scan_children()
233 			scan_inflight(&u->sk, func, hitlist);  in scan_children()
234 			list_del_init(&u->link);  in scan_children()
249 static void inc_inflight_move_tail(struct unix_sock *u)  in inc_inflight_move_tail()  argument
251 	atomic_long_inc(&u->inflight);  in inc_inflight_move_tail()
257 	if (test_bit(UNIX_GC_MAYBE_CYCLE, &u->gc_flags))  in inc_inflight_move_tail()
258 		list_move_tail(&u->link, &gc_candidates);  in inc_inflight_move_tail()
278 	struct unix_sock *u;  in unix_gc()  local
307 	list_for_each_entry_safe(u, next, &gc_inflight_list, link) {  in unix_gc()
311 		total_refs = file_count(u->sk.sk_socket->file);  in unix_gc()
312 		inflight_refs = atomic_long_read(&u->inflight);  in unix_gc()
317 			list_move_tail(&u->link, &gc_candidates);  in unix_gc()
318 			__set_bit(UNIX_GC_CANDIDATE, &u->gc_flags);  in unix_gc()
319 			__set_bit(UNIX_GC_MAYBE_CYCLE, &u->gc_flags);  in unix_gc()
327 	list_for_each_entry(u, &gc_candidates, link)  in unix_gc()
328 		scan_children(&u->sk, dec_inflight, NULL);  in unix_gc()
340 		u = list_entry(cursor.next, struct unix_sock, link);  in unix_gc()
343 		list_move(&cursor, &u->link);  in unix_gc()
345 		if (atomic_long_read(&u->inflight) > 0) {  in unix_gc()
346 			list_move_tail(&u->link, &not_cycle_list);  in unix_gc()
347 			__clear_bit(UNIX_GC_MAYBE_CYCLE, &u->gc_flags);  in unix_gc()
348 			scan_children(&u->sk, inc_inflight_move_tail, NULL);  in unix_gc()
358 		u = list_entry(not_cycle_list.next, struct unix_sock, link);  in unix_gc()
359 		__clear_bit(UNIX_GC_CANDIDATE, &u->gc_flags);  in unix_gc()
360 		list_move_tail(&u->link, &gc_inflight_list);  in unix_gc()
369 	list_for_each_entry(u, &gc_candidates, link)  in unix_gc()
370 	scan_children(&u->sk, inc_inflight, &hitlist);  in unix_gc()