103 static inline bool cache_entry_expired(const struct dfs_cache_entry *ce)  in cache_entry_expired()  argument
108 	return timespec64_compare(&ts, &ce->ce_etime) >= 0;  in cache_entry_expired()
111 static inline void free_tgts(struct dfs_cache_entry *ce)  in free_tgts()  argument
115 	list_for_each_entry_safe(t, n, &ce->ce_tlist, t_list) {  in free_tgts()
124 	struct dfs_cache_entry *ce = container_of(rcu, struct dfs_cache_entry,  in free_cache_entry()  local
126 	kmem_cache_free(dfs_cache_slab, ce);  in free_cache_entry()
129 static inline void flush_cache_ent(struct dfs_cache_entry *ce)  in flush_cache_ent()  argument
131 	if (hlist_unhashed(&ce->ce_hlist))  in flush_cache_ent()
134 	hlist_del_init_rcu(&ce->ce_hlist);  in flush_cache_ent()
135 	kfree_const(ce->ce_path);  in flush_cache_ent()
136 	free_tgts(ce);  in flush_cache_ent()
138 	call_rcu(&ce->ce_rcu, free_cache_entry);  in flush_cache_ent()
148 		struct dfs_cache_entry *ce;  in flush_cache_ents()  local
150 		hlist_for_each_entry_rcu(ce, l, ce_hlist)  in flush_cache_ents()
151 			flush_cache_ent(ce);  in flush_cache_ents()
162 	struct dfs_cache_entry *ce;  in dfscache_proc_show()  local
170 	hash_for_each_rcu(dfs_cache_htable, bucket, ce, ce_hlist) {  in dfscache_proc_show()
174 			   ce->ce_path,  in dfscache_proc_show()
175 			   ce->ce_srvtype == DFS_TYPE_ROOT ? "root" : "link",  in dfscache_proc_show()
176 			   ce->ce_ttl, ce->ce_etime.tv_nsec,  in dfscache_proc_show()
177 			   IS_INTERLINK_SET(ce->ce_flags) ? "yes" : "no",  in dfscache_proc_show()
178 			   ce->ce_path_consumed,  in dfscache_proc_show()
179 			   cache_entry_expired(ce) ? "yes" : "no");  in dfscache_proc_show()
181 		list_for_each_entry(t, &ce->ce_tlist, t_list) {  in dfscache_proc_show()
184 				   ce->ce_tgthint == t ? " (target hint)" : "");  in dfscache_proc_show()
229 static inline void dump_tgts(const struct dfs_cache_entry *ce)  in dump_tgts()  argument
234 	list_for_each_entry(t, &ce->ce_tlist, t_list) {  in dump_tgts()
236 			 ce->ce_tgthint == t ? " (target hint)" : "");  in dump_tgts()
240 static inline void dump_ce(const struct dfs_cache_entry *ce)  in dump_ce()  argument
243 		 "interlink=%s,path_consumed=%d,expired=%s\n", ce->ce_path,  in dump_ce()
244 		 ce->ce_srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ce_ttl,  in dump_ce()
245 		 ce->ce_etime.tv_nsec,  in dump_ce()
246 		 IS_INTERLINK_SET(ce->ce_flags) ? "yes" : "no",  in dump_ce()
247 		 ce->ce_path_consumed,  in dump_ce()
248 		 cache_entry_expired(ce) ? "yes" : "no");  in dump_ce()
249 	dump_tgts(ce);  in dump_ce()
328 static inline char *get_tgt_name(const struct dfs_cache_entry *ce)  in get_tgt_name()  argument
330 	struct dfs_cache_tgt *t = ce->ce_tgthint;  in get_tgt_name()
370 			 struct dfs_cache_entry *ce, const char *tgthint)  in copy_ref_data()  argument
374 	ce->ce_ttl = refs[0].ttl;  in copy_ref_data()
375 	ce->ce_etime = get_expire_time(ce->ce_ttl);  in copy_ref_data()
376 	ce->ce_srvtype = refs[0].server_type;  in copy_ref_data()
377 	ce->ce_flags = refs[0].ref_flag;  in copy_ref_data()
378 	ce->ce_path_consumed = refs[0].path_consumed;  in copy_ref_data()
385 			free_tgts(ce);  in copy_ref_data()
389 			list_add(&t->t_list, &ce->ce_tlist);  in copy_ref_data()
392 			list_add_tail(&t->t_list, &ce->ce_tlist);  in copy_ref_data()
394 		ce->ce_numtgts++;  in copy_ref_data()
397 	ce->ce_tgthint = list_first_entry_or_null(&ce->ce_tlist,  in copy_ref_data()
408 	struct dfs_cache_entry *ce;  in alloc_cache_entry()  local
411 	ce = kmem_cache_zalloc(dfs_cache_slab, GFP_KERNEL);  in alloc_cache_entry()
412 	if (!ce)  in alloc_cache_entry()
415 	ce->ce_path = kstrdup_const(path, GFP_KERNEL);  in alloc_cache_entry()
416 	if (!ce->ce_path) {  in alloc_cache_entry()
417 		kmem_cache_free(dfs_cache_slab, ce);  in alloc_cache_entry()
420 	INIT_HLIST_NODE(&ce->ce_hlist);  in alloc_cache_entry()
421 	INIT_LIST_HEAD(&ce->ce_tlist);  in alloc_cache_entry()
423 	rc = copy_ref_data(refs, numrefs, ce, NULL);  in alloc_cache_entry()
425 		kfree_const(ce->ce_path);  in alloc_cache_entry()
426 		kmem_cache_free(dfs_cache_slab, ce);  in alloc_cache_entry()
427 		ce = ERR_PTR(rc);  in alloc_cache_entry()
429 	return ce;  in alloc_cache_entry()
435 	struct dfs_cache_entry *ce;  in remove_oldest_entry()  local
439 	hash_for_each_rcu(dfs_cache_htable, bucket, ce, ce_hlist) {  in remove_oldest_entry()
440 		if (!to_del || timespec64_compare(&ce->ce_etime,  in remove_oldest_entry()
442 			to_del = ce;  in remove_oldest_entry()
460 	struct dfs_cache_entry *ce;  in add_cache_entry()  local
462 	ce = alloc_cache_entry(path, refs, numrefs);  in add_cache_entry()
463 	if (IS_ERR(ce))  in add_cache_entry()
464 		return ce;  in add_cache_entry()
466 	hlist_add_head_rcu(&ce->ce_hlist, &dfs_cache_htable[hash]);  in add_cache_entry()
470 		dfs_cache.dc_ttl = ce->ce_ttl;  in add_cache_entry()
474 		dfs_cache.dc_ttl = min_t(int, dfs_cache.dc_ttl, ce->ce_ttl);  in add_cache_entry()
480 	return ce;  in add_cache_entry()
486 	struct dfs_cache_entry *ce;  in __find_cache_entry()  local
490 	hlist_for_each_entry_rcu(ce, &dfs_cache_htable[hash], ce_hlist) {  in __find_cache_entry()
491 		if (!strcasecmp(path, ce->ce_path)) {  in __find_cache_entry()
493 			char *name = get_tgt_name(ce);  in __find_cache_entry()
507 	return found ? ce : ERR_PTR(-ENOENT);  in __find_cache_entry()
569 	struct dfs_cache_entry *ce;  in __update_cache_entry()  local
572 	ce = find_cache_entry(path, &h);  in __update_cache_entry()
573 	if (IS_ERR(ce))  in __update_cache_entry()
574 		return ce;  in __update_cache_entry()
576 	if (ce->ce_tgthint) {  in __update_cache_entry()
577 		s = ce->ce_tgthint->t_name;  in __update_cache_entry()
583 	free_tgts(ce);  in __update_cache_entry()
584 	ce->ce_numtgts = 0;  in __update_cache_entry()
586 	rc = copy_ref_data(refs, numrefs, ce, th);  in __update_cache_entry()
590 		ce = ERR_PTR(rc);  in __update_cache_entry()
592 	return ce;  in __update_cache_entry()
599 		   const char *path, struct dfs_cache_entry *ce)  in update_cache_entry()  argument
620 		ce = ERR_PTR(rc);  in update_cache_entry()
622 		ce = __update_cache_entry(path, refs, numrefs);  in update_cache_entry()
627 	return ce;  in update_cache_entry()
646 	struct dfs_cache_entry *ce;  in do_dfs_cache_find()  local
652 	ce = find_cache_entry(path, &h);  in do_dfs_cache_find()
653 	if (IS_ERR(ce)) {  in do_dfs_cache_find()
660 			return ce;  in do_dfs_cache_find()
667 			ce = ERR_PTR(-EOPNOTSUPP);  in do_dfs_cache_find()
668 			return ce;  in do_dfs_cache_find()
671 			ce = ERR_PTR(-EINVAL);  in do_dfs_cache_find()
672 			return ce;  in do_dfs_cache_find()
685 			ce = ERR_PTR(rc);  in do_dfs_cache_find()
686 			return ce;  in do_dfs_cache_find()
698 		ce = add_cache_entry(h, path, nrefs, numnrefs);  in do_dfs_cache_find()
701 		if (IS_ERR(ce))  in do_dfs_cache_find()
702 			return ce;  in do_dfs_cache_find()
707 	dump_ce(ce);  in do_dfs_cache_find()
711 		return ce;  in do_dfs_cache_find()
713 	if (cache_entry_expired(ce)) {  in do_dfs_cache_find()
715 		ce = update_cache_entry(xid, ses, nls_codepage, remap, path,  in do_dfs_cache_find()
716 					ce);  in do_dfs_cache_find()
717 		if (IS_ERR(ce)) {  in do_dfs_cache_find()
722 	return ce;  in do_dfs_cache_find()
726 static int setup_ref(const char *path, const struct dfs_cache_entry *ce,  in setup_ref()  argument
739 	ref->path_consumed = ce->ce_path_consumed;  in setup_ref()
747 	ref->ttl = ce->ce_ttl;  in setup_ref()
748 	ref->server_type = ce->ce_srvtype;  in setup_ref()
749 	ref->ref_flag = ce->ce_flags;  in setup_ref()
760 static int get_tgt_list(const struct dfs_cache_entry *ce,  in get_tgt_list()  argument
771 	list_for_each_entry(t, &ce->ce_tlist, t_list) {  in get_tgt_list()
786 		if (ce->ce_tgthint == t)  in get_tgt_list()
791 	tl->tl_numtgts = ce->ce_numtgts;  in get_tgt_list()
832 	struct dfs_cache_entry *ce;  in dfs_cache_find()  local
842 	ce = do_dfs_cache_find(xid, ses, nls_codepage, remap, npath, false);  in dfs_cache_find()
843 	if (!IS_ERR(ce)) {  in dfs_cache_find()
845 			rc = setup_ref(path, ce, ref, get_tgt_name(ce));  in dfs_cache_find()
849 			rc = get_tgt_list(ce, tgt_list);  in dfs_cache_find()
851 		rc = PTR_ERR(ce);  in dfs_cache_find()
879 	struct dfs_cache_entry *ce;  in dfs_cache_noreq_find()  local
889 	ce = do_dfs_cache_find(0, NULL, NULL, 0, npath, true);  in dfs_cache_noreq_find()
890 	if (IS_ERR(ce)) {  in dfs_cache_noreq_find()
891 		rc = PTR_ERR(ce);  in dfs_cache_noreq_find()
896 		rc = setup_ref(path, ce, ref, get_tgt_name(ce));  in dfs_cache_noreq_find()
900 		rc = get_tgt_list(ce, tgt_list);  in dfs_cache_noreq_find()
932 	struct dfs_cache_entry *ce;  in dfs_cache_update_tgthint()  local
945 	ce = do_dfs_cache_find(xid, ses, nls_codepage, remap, npath, false);  in dfs_cache_update_tgthint()
946 	if (IS_ERR(ce)) {  in dfs_cache_update_tgthint()
947 		rc = PTR_ERR(ce);  in dfs_cache_update_tgthint()
953 	t = ce->ce_tgthint;  in dfs_cache_update_tgthint()
958 	list_for_each_entry(t, &ce->ce_tlist, t_list) {  in dfs_cache_update_tgthint()
960 			ce->ce_tgthint = t;  in dfs_cache_update_tgthint()
992 	struct dfs_cache_entry *ce;  in dfs_cache_noreq_update_tgthint()  local
1006 	ce = do_dfs_cache_find(0, NULL, NULL, 0, npath, true);  in dfs_cache_noreq_update_tgthint()
1007 	if (IS_ERR(ce)) {  in dfs_cache_noreq_update_tgthint()
1008 		rc = PTR_ERR(ce);  in dfs_cache_noreq_update_tgthint()
1014 	t = ce->ce_tgthint;  in dfs_cache_noreq_update_tgthint()
1019 	list_for_each_entry(t, &ce->ce_tlist, t_list) {  in dfs_cache_noreq_update_tgthint()
1021 			ce->ce_tgthint = t;  in dfs_cache_noreq_update_tgthint()
1050 	struct dfs_cache_entry *ce;  in dfs_cache_get_tgt_referral()  local
1066 	ce = find_cache_entry(npath, &h);  in dfs_cache_get_tgt_referral()
1067 	if (IS_ERR(ce)) {  in dfs_cache_get_tgt_referral()
1068 		rc = PTR_ERR(ce);  in dfs_cache_get_tgt_referral()
1074 	rc = setup_ref(path, ce, ref, it->it_name);  in dfs_cache_get_tgt_referral()
1384 	struct dfs_cache_entry *ce;  in do_refresh_tcon()  local
1398 	ce = find_cache_entry(npath, &h);  in do_refresh_tcon()
1401 	if (IS_ERR(ce)) {  in do_refresh_tcon()
1402 		rc = PTR_ERR(ce);  in do_refresh_tcon()
1406 	if (!cache_entry_expired(ce))  in do_refresh_tcon()
1429 			ce = __update_cache_entry(npath, refs, numrefs);  in do_refresh_tcon()
1433 			if (IS_ERR(ce))  in do_refresh_tcon()
1434 				rc = PTR_ERR(ce);  in do_refresh_tcon()