220 static inline bool cache_entry_expired(const struct cache_entry *ce)  in cache_entry_expired()  argument
225 	return timespec64_compare(&ts, &ce->etime) >= 0;  in cache_entry_expired()
228 static inline void free_tgts(struct cache_entry *ce)  in free_tgts()  argument
232 	list_for_each_entry_safe(t, n, &ce->tlist, list) {  in free_tgts()
239 static inline void flush_cache_ent(struct cache_entry *ce)  in flush_cache_ent()  argument
241 	hlist_del_init(&ce->hlist);  in flush_cache_ent()
242 	kfree(ce->path);  in flush_cache_ent()
243 	free_tgts(ce);  in flush_cache_ent()
245 	kmem_cache_free(cache_slab, ce);  in flush_cache_ent()
255 		struct cache_entry *ce;  in flush_cache_ents()  local
257 		hlist_for_each_entry_safe(ce, n, l, hlist) {  in flush_cache_ents()
258 			if (!hlist_unhashed(&ce->hlist))  in flush_cache_ents()
259 				flush_cache_ent(ce);  in flush_cache_ents()
270 	struct cache_entry *ce;  in dfscache_proc_show()  local
279 		hlist_for_each_entry(ce, l, hlist) {  in dfscache_proc_show()
280 			if (hlist_unhashed(&ce->hlist))  in dfscache_proc_show()
285 				   ce->path, ce->srvtype == DFS_TYPE_ROOT ? "root" : "link",  in dfscache_proc_show()
286 				   ce->ttl, ce->etime.tv_nsec, ce->hdr_flags, ce->ref_flags,  in dfscache_proc_show()
287 				   IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no",  in dfscache_proc_show()
288 				   ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no");  in dfscache_proc_show()
290 			list_for_each_entry(t, &ce->tlist, list) {  in dfscache_proc_show()
293 					   ce->tgthint == t ? " (target hint)" : "");  in dfscache_proc_show()
338 static inline void dump_tgts(const struct cache_entry *ce)  in dump_tgts()  argument
343 	list_for_each_entry(t, &ce->tlist, list) {  in dump_tgts()
345 			 ce->tgthint == t ? " (target hint)" : "");  in dump_tgts()
349 static inline void dump_ce(const struct cache_entry *ce)  in dump_ce()  argument
352 		 ce->path,  in dump_ce()
353 		 ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl,  in dump_ce()
354 		 ce->etime.tv_nsec,  in dump_ce()
355 		 ce->hdr_flags, ce->ref_flags,  in dump_ce()
356 		 IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no",  in dump_ce()
357 		 ce->path_consumed,  in dump_ce()
358 		 cache_entry_expired(ce) ? "yes" : "no");  in dump_ce()
359 	dump_tgts(ce);  in dump_ce()
449 static inline char *get_tgt_name(const struct cache_entry *ce)  in get_tgt_name()  argument
451 	struct cache_dfs_tgt *t = ce->tgthint;  in get_tgt_name()
492 			 struct cache_entry *ce, const char *tgthint)  in copy_ref_data()  argument
496 	ce->ttl = max_t(int, refs[0].ttl, CACHE_MIN_TTL);  in copy_ref_data()
497 	ce->etime = get_expire_time(ce->ttl);  in copy_ref_data()
498 	ce->srvtype = refs[0].server_type;  in copy_ref_data()
499 	ce->hdr_flags = refs[0].flags;  in copy_ref_data()
500 	ce->ref_flags = refs[0].ref_flag;  in copy_ref_data()
501 	ce->path_consumed = refs[0].path_consumed;  in copy_ref_data()
508 			free_tgts(ce);  in copy_ref_data()
512 			list_add(&t->list, &ce->tlist);  in copy_ref_data()
515 			list_add_tail(&t->list, &ce->tlist);  in copy_ref_data()
517 		ce->numtgts++;  in copy_ref_data()
520 	ce->tgthint = list_first_entry_or_null(&ce->tlist,  in copy_ref_data()
529 	struct cache_entry *ce;  in alloc_cache_entry()  local
532 	ce = kmem_cache_zalloc(cache_slab, GFP_KERNEL);  in alloc_cache_entry()
533 	if (!ce)  in alloc_cache_entry()
536 	ce->path = refs[0].path_name;  in alloc_cache_entry()
539 	INIT_HLIST_NODE(&ce->hlist);  in alloc_cache_entry()
540 	INIT_LIST_HEAD(&ce->tlist);  in alloc_cache_entry()
542 	rc = copy_ref_data(refs, numrefs, ce, NULL);  in alloc_cache_entry()
544 		kfree(ce->path);  in alloc_cache_entry()
545 		kmem_cache_free(cache_slab, ce);  in alloc_cache_entry()
546 		ce = ERR_PTR(rc);  in alloc_cache_entry()
548 	return ce;  in alloc_cache_entry()
554 	struct cache_entry *ce;  in remove_oldest_entry_locked()  local
562 		hlist_for_each_entry(ce, l, hlist) {  in remove_oldest_entry_locked()
563 			if (hlist_unhashed(&ce->hlist))  in remove_oldest_entry_locked()
565 			if (!to_del || timespec64_compare(&ce->etime,  in remove_oldest_entry_locked()
567 				to_del = ce;  in remove_oldest_entry_locked()
585 	struct cache_entry *ce;  in add_cache_entry_locked()  local
599 	ce = alloc_cache_entry(refs, numrefs);  in add_cache_entry_locked()
600 	if (IS_ERR(ce))  in add_cache_entry_locked()
601 		return PTR_ERR(ce);  in add_cache_entry_locked()
605 		cache_ttl = ce->ttl;  in add_cache_entry_locked()
608 		cache_ttl = min_t(int, cache_ttl, ce->ttl);  in add_cache_entry_locked()
613 	hlist_add_head(&ce->hlist, &cache_htable[hash]);  in add_cache_entry_locked()
614 	dump_ce(ce);  in add_cache_entry_locked()
649 	struct cache_entry *ce;  in __lookup_cache_entry()  local
651 	hlist_for_each_entry(ce, &cache_htable[hash], hlist) {  in __lookup_cache_entry()
652 		if (dfs_path_equal(ce->path, strlen(ce->path), path, len)) {  in __lookup_cache_entry()
653 			dump_ce(ce);  in __lookup_cache_entry()
654 			return ce;  in __lookup_cache_entry()
669 	struct cache_entry *ce;  in lookup_cache_entry()  local
705 		ce = __lookup_cache_entry(path, hash, len);  in lookup_cache_entry()
706 		if (!IS_ERR(ce))  in lookup_cache_entry()
707 			return ce;  in lookup_cache_entry()
732 static int update_cache_entry_locked(struct cache_entry *ce, const struct dfs_info3_param *refs,  in update_cache_entry_locked()  argument
740 	if (ce->tgthint) {  in update_cache_entry_locked()
741 		s = ce->tgthint->name;  in update_cache_entry_locked()
747 	free_tgts(ce);  in update_cache_entry_locked()
748 	ce->numtgts = 0;  in update_cache_entry_locked()
750 	rc = copy_ref_data(refs, numrefs, ce, th);  in update_cache_entry_locked()
796 	struct cache_entry *ce;  in cache_refresh_path()  local
805 	ce = lookup_cache_entry(path);  in cache_refresh_path()
806 	if (!IS_ERR(ce)) {  in cache_refresh_path()
807 		if (!cache_entry_expired(ce)) {  in cache_refresh_path()
808 			dump_ce(ce);  in cache_refresh_path()
827 		rc = update_cache_entry_locked(ce, refs, numrefs);  in cache_refresh_path()
844 static int setup_referral(const char *path, struct cache_entry *ce,  in setup_referral()  argument
863 	ref->path_consumed = ce->path_consumed;  in setup_referral()
864 	ref->ttl = ce->ttl;  in setup_referral()
865 	ref->server_type = ce->srvtype;  in setup_referral()
866 	ref->ref_flag = ce->ref_flags;  in setup_referral()
867 	ref->flags = ce->hdr_flags;  in setup_referral()
878 static int get_targets(struct cache_entry *ce, struct dfs_cache_tgt_list *tl)  in get_targets()  argument
888 	list_for_each_entry(t, &ce->tlist, list) {  in get_targets()
903 		if (ce->tgthint == t)  in get_targets()
909 	tl->tl_numtgts = ce->numtgts;  in get_targets()
950 	struct cache_entry *ce;  in dfs_cache_find()  local
962 	ce = lookup_cache_entry(npath);  in dfs_cache_find()
963 	if (IS_ERR(ce)) {  in dfs_cache_find()
965 		rc = PTR_ERR(ce);  in dfs_cache_find()
970 		rc = setup_referral(path, ce, ref, get_tgt_name(ce));  in dfs_cache_find()
974 		rc = get_targets(ce, tgt_list);  in dfs_cache_find()
1003 	struct cache_entry *ce;  in dfs_cache_noreq_find()  local
1009 	ce = lookup_cache_entry(path);  in dfs_cache_noreq_find()
1010 	if (IS_ERR(ce)) {  in dfs_cache_noreq_find()
1011 		rc = PTR_ERR(ce);  in dfs_cache_noreq_find()
1016 		rc = setup_referral(path, ce, ref, get_tgt_name(ce));  in dfs_cache_noreq_find()
1020 		rc = get_targets(ce, tgt_list);  in dfs_cache_noreq_find()
1051 	struct cache_entry *ce;  in dfs_cache_update_tgthint()  local
1066 	ce = lookup_cache_entry(npath);  in dfs_cache_update_tgthint()
1067 	if (IS_ERR(ce)) {  in dfs_cache_update_tgthint()
1068 		rc = PTR_ERR(ce);  in dfs_cache_update_tgthint()
1072 	t = ce->tgthint;  in dfs_cache_update_tgthint()
1077 	list_for_each_entry(t, &ce->tlist, list) {  in dfs_cache_update_tgthint()
1079 			ce->tgthint = t;  in dfs_cache_update_tgthint()
1110 	struct cache_entry *ce;  in dfs_cache_noreq_update_tgthint()  local
1120 	ce = lookup_cache_entry(path);  in dfs_cache_noreq_update_tgthint()
1121 	if (IS_ERR(ce)) {  in dfs_cache_noreq_update_tgthint()
1122 		rc = PTR_ERR(ce);  in dfs_cache_noreq_update_tgthint()
1127 	t = ce->tgthint;  in dfs_cache_noreq_update_tgthint()
1132 	list_for_each_entry(t, &ce->tlist, list) {  in dfs_cache_noreq_update_tgthint()
1134 			ce->tgthint = t;  in dfs_cache_noreq_update_tgthint()
1160 	struct cache_entry *ce;  in dfs_cache_get_tgt_referral()  local
1169 	ce = lookup_cache_entry(path);  in dfs_cache_get_tgt_referral()
1170 	if (IS_ERR(ce)) {  in dfs_cache_get_tgt_referral()
1171 		rc = PTR_ERR(ce);  in dfs_cache_get_tgt_referral()
1177 	rc = setup_referral(path, ce, ref, it->it_name);  in dfs_cache_get_tgt_referral()
1380 	struct cache_entry *ce;  in __refresh_tcon()  local
1395 	ce = lookup_cache_entry(path);  in __refresh_tcon()
1396 	needs_refresh = force_refresh || IS_ERR(ce) || cache_entry_expired(ce);  in __refresh_tcon()
1397 	if (!IS_ERR(ce)) {  in __refresh_tcon()
1398 		rc = get_targets(ce, &tl);  in __refresh_tcon()
1418 		ce = lookup_cache_entry(path);  in __refresh_tcon()
1419 		if (IS_ERR(ce))  in __refresh_tcon()
1421 		else if (force_refresh || cache_entry_expired(ce))  in __refresh_tcon()
1422 			update_cache_entry_locked(ce, refs, numrefs);  in __refresh_tcon()
1574 	struct cache_entry *ce;  in refresh_cache()  local
1587 		hlist_for_each_entry(ce, l, hlist) {  in refresh_cache()
1590 			if (hlist_unhashed(&ce->hlist) || !cache_entry_expired(ce) ||  in refresh_cache()
1591 			    IS_ERR(find_ipc_from_server_path(sessions, ce->path)))  in refresh_cache()
1593 			ref_paths[count++] = kstrdup(ce->path, GFP_ATOMIC);  in refresh_cache()
1619 			ce = lookup_cache_entry(path);  in refresh_cache()
1624 			if (!IS_ERR(ce) && cache_entry_expired(ce))  in refresh_cache()
1625 				update_cache_entry_locked(ce, refs, numrefs);  in refresh_cache()