11 struct ucounts init_ucounts = {
131 static struct ucounts *find_ucounts(struct user_namespace *ns, kuid_t uid, struct hlist_head *hashe…  in find_ucounts()
133 	struct ucounts *ucounts;  in find_ucounts()  local
135 	hlist_for_each_entry(ucounts, hashent, node) {  in find_ucounts()
136 		if (uid_eq(ucounts->uid, uid) && (ucounts->ns == ns))  in find_ucounts()
137 			return ucounts;  in find_ucounts()
142 static void hlist_add_ucounts(struct ucounts *ucounts)  in hlist_add_ucounts()  argument
144 	struct hlist_head *hashent = ucounts_hashentry(ucounts->ns, ucounts->uid);  in hlist_add_ucounts()
146 	hlist_add_head(&ucounts->node, hashent);  in hlist_add_ucounts()
150 static inline bool get_ucounts_or_wrap(struct ucounts *ucounts)  in get_ucounts_or_wrap()  argument
153 	return !atomic_add_negative(1, &ucounts->count);  in get_ucounts_or_wrap()
156 struct ucounts *get_ucounts(struct ucounts *ucounts)  in get_ucounts()  argument
158 	if (!get_ucounts_or_wrap(ucounts)) {  in get_ucounts()
159 		put_ucounts(ucounts);  in get_ucounts()
160 		ucounts = NULL;  in get_ucounts()
162 	return ucounts;  in get_ucounts()
165 struct ucounts *alloc_ucounts(struct user_namespace *ns, kuid_t uid)  in alloc_ucounts()
168 	struct ucounts *ucounts, *new;  in alloc_ucounts()  local
172 	ucounts = find_ucounts(ns, uid, hashent);  in alloc_ucounts()
173 	if (!ucounts) {  in alloc_ucounts()
185 		ucounts = find_ucounts(ns, uid, hashent);  in alloc_ucounts()
186 		if (ucounts) {  in alloc_ucounts()
195 	wrapped = !get_ucounts_or_wrap(ucounts);  in alloc_ucounts()
198 		put_ucounts(ucounts);  in alloc_ucounts()
201 	return ucounts;  in alloc_ucounts()
204 void put_ucounts(struct ucounts *ucounts)  in put_ucounts()  argument
208 	if (atomic_dec_and_lock_irqsave(&ucounts->count, &ucounts_lock, flags)) {  in put_ucounts()
209 		hlist_del_init(&ucounts->node);  in put_ucounts()
211 		put_user_ns(ucounts->ns);  in put_ucounts()
212 		kfree(ucounts);  in put_ucounts()
230 struct ucounts *inc_ucount(struct user_namespace *ns, kuid_t uid,  in inc_ucount()
233 	struct ucounts *ucounts, *iter, *bad;  in inc_ucount()  local
235 	ucounts = alloc_ucounts(ns, uid);  in inc_ucount()
236 	for (iter = ucounts; iter; iter = tns->ucounts) {  in inc_ucount()
243 	return ucounts;  in inc_ucount()
246 	for (iter = ucounts; iter != bad; iter = iter->ns->ucounts)  in inc_ucount()
249 	put_ucounts(ucounts);  in inc_ucount()
253 void dec_ucount(struct ucounts *ucounts, enum ucount_type type)  in dec_ucount()  argument
255 	struct ucounts *iter;  in dec_ucount()
256 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in dec_ucount()
260 	put_ucounts(ucounts);  in dec_ucount()
263 long inc_rlimit_ucounts(struct ucounts *ucounts, enum rlimit_type type, long v)  in inc_rlimit_ucounts()  argument
265 	struct ucounts *iter;  in inc_rlimit_ucounts()
269 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in inc_rlimit_ucounts()
273 		else if (iter == ucounts)  in inc_rlimit_ucounts()
280 bool dec_rlimit_ucounts(struct ucounts *ucounts, enum rlimit_type type, long v)  in dec_rlimit_ucounts()  argument
282 	struct ucounts *iter;  in dec_rlimit_ucounts()
284 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in dec_rlimit_ucounts()
287 		if (iter == ucounts)  in dec_rlimit_ucounts()
293 static void do_dec_rlimit_put_ucounts(struct ucounts *ucounts,  in do_dec_rlimit_put_ucounts()  argument
294 				struct ucounts *last, enum rlimit_type type)  in do_dec_rlimit_put_ucounts()
296 	struct ucounts *iter, *next;  in do_dec_rlimit_put_ucounts()
297 	for (iter = ucounts; iter != last; iter = next) {  in do_dec_rlimit_put_ucounts()
300 		next = iter->ns->ucounts;  in do_dec_rlimit_put_ucounts()
306 void dec_rlimit_put_ucounts(struct ucounts *ucounts, enum rlimit_type type)  in dec_rlimit_put_ucounts()  argument
308 	do_dec_rlimit_put_ucounts(ucounts, NULL, type);  in dec_rlimit_put_ucounts()
311 long inc_rlimit_get_ucounts(struct ucounts *ucounts, enum rlimit_type type,  in inc_rlimit_get_ucounts()  argument
315 	struct ucounts *iter;  in inc_rlimit_get_ucounts()
319 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in inc_rlimit_get_ucounts()
323 		if (iter == ucounts)  in inc_rlimit_get_ucounts()
340 	do_dec_rlimit_put_ucounts(ucounts, iter, type);  in inc_rlimit_get_ucounts()
344 bool is_rlimit_overlimit(struct ucounts *ucounts, enum rlimit_type type, unsigned long rlimit)  in is_rlimit_overlimit()  argument
346 	struct ucounts *iter;  in is_rlimit_overlimit()
350 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in is_rlimit_overlimit()