11 struct ucounts init_ucounts = {
130 static struct ucounts *find_ucounts(struct user_namespace *ns, kuid_t uid, struct hlist_head *hashe…  in find_ucounts()
132 	struct ucounts *ucounts;  in find_ucounts()  local
134 	hlist_for_each_entry(ucounts, hashent, node) {  in find_ucounts()
135 		if (uid_eq(ucounts->uid, uid) && (ucounts->ns == ns))  in find_ucounts()
136 			return ucounts;  in find_ucounts()
141 static void hlist_add_ucounts(struct ucounts *ucounts)  in hlist_add_ucounts()  argument
143 	struct hlist_head *hashent = ucounts_hashentry(ucounts->ns, ucounts->uid);  in hlist_add_ucounts()
145 	hlist_add_head(&ucounts->node, hashent);  in hlist_add_ucounts()
149 static inline bool get_ucounts_or_wrap(struct ucounts *ucounts)  in get_ucounts_or_wrap()  argument
152 	return !atomic_add_negative(1, &ucounts->count);  in get_ucounts_or_wrap()
155 struct ucounts *get_ucounts(struct ucounts *ucounts)  in get_ucounts()  argument
157 	if (!get_ucounts_or_wrap(ucounts)) {  in get_ucounts()
158 		put_ucounts(ucounts);  in get_ucounts()
159 		ucounts = NULL;  in get_ucounts()
161 	return ucounts;  in get_ucounts()
164 struct ucounts *alloc_ucounts(struct user_namespace *ns, kuid_t uid)  in alloc_ucounts()
167 	struct ucounts *ucounts, *new;  in alloc_ucounts()  local
171 	ucounts = find_ucounts(ns, uid, hashent);  in alloc_ucounts()
172 	if (!ucounts) {  in alloc_ucounts()
184 		ucounts = find_ucounts(ns, uid, hashent);  in alloc_ucounts()
185 		if (ucounts) {  in alloc_ucounts()
194 	wrapped = !get_ucounts_or_wrap(ucounts);  in alloc_ucounts()
197 		put_ucounts(ucounts);  in alloc_ucounts()
200 	return ucounts;  in alloc_ucounts()
203 void put_ucounts(struct ucounts *ucounts)  in put_ucounts()  argument
207 	if (atomic_dec_and_lock_irqsave(&ucounts->count, &ucounts_lock, flags)) {  in put_ucounts()
208 		hlist_del_init(&ucounts->node);  in put_ucounts()
210 		put_user_ns(ucounts->ns);  in put_ucounts()
211 		kfree(ucounts);  in put_ucounts()
229 struct ucounts *inc_ucount(struct user_namespace *ns, kuid_t uid,  in inc_ucount()
232 	struct ucounts *ucounts, *iter, *bad;  in inc_ucount()  local
234 	ucounts = alloc_ucounts(ns, uid);  in inc_ucount()
235 	for (iter = ucounts; iter; iter = tns->ucounts) {  in inc_ucount()
242 	return ucounts;  in inc_ucount()
245 	for (iter = ucounts; iter != bad; iter = iter->ns->ucounts)  in inc_ucount()
248 	put_ucounts(ucounts);  in inc_ucount()
252 void dec_ucount(struct ucounts *ucounts, enum ucount_type type)  in dec_ucount()  argument
254 	struct ucounts *iter;  in dec_ucount()
255 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in dec_ucount()
259 	put_ucounts(ucounts);  in dec_ucount()
262 long inc_rlimit_ucounts(struct ucounts *ucounts, enum rlimit_type type, long v)  in inc_rlimit_ucounts()  argument
264 	struct ucounts *iter;  in inc_rlimit_ucounts()
268 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in inc_rlimit_ucounts()
272 		else if (iter == ucounts)  in inc_rlimit_ucounts()
279 bool dec_rlimit_ucounts(struct ucounts *ucounts, enum rlimit_type type, long v)  in dec_rlimit_ucounts()  argument
281 	struct ucounts *iter;  in dec_rlimit_ucounts()
283 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in dec_rlimit_ucounts()
286 		if (iter == ucounts)  in dec_rlimit_ucounts()
292 static void do_dec_rlimit_put_ucounts(struct ucounts *ucounts,  in do_dec_rlimit_put_ucounts()  argument
293 				struct ucounts *last, enum rlimit_type type)  in do_dec_rlimit_put_ucounts()
295 	struct ucounts *iter, *next;  in do_dec_rlimit_put_ucounts()
296 	for (iter = ucounts; iter != last; iter = next) {  in do_dec_rlimit_put_ucounts()
299 		next = iter->ns->ucounts;  in do_dec_rlimit_put_ucounts()
305 void dec_rlimit_put_ucounts(struct ucounts *ucounts, enum rlimit_type type)  in dec_rlimit_put_ucounts()  argument
307 	do_dec_rlimit_put_ucounts(ucounts, NULL, type);  in dec_rlimit_put_ucounts()
310 long inc_rlimit_get_ucounts(struct ucounts *ucounts, enum rlimit_type type)  in inc_rlimit_get_ucounts()  argument
313 	struct ucounts *iter;  in inc_rlimit_get_ucounts()
317 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in inc_rlimit_get_ucounts()
321 		if (iter == ucounts)  in inc_rlimit_get_ucounts()
338 	do_dec_rlimit_put_ucounts(ucounts, iter, type);  in inc_rlimit_get_ucounts()
342 bool is_rlimit_overlimit(struct ucounts *ucounts, enum rlimit_type type, unsigned long rlimit)  in is_rlimit_overlimit()  argument
344 	struct ucounts *iter;  in is_rlimit_overlimit()
348 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {  in is_rlimit_overlimit()