1 /* SPDX-License-Identifier: GPL-2.0 */
3 * DFS referral cache routines
5 * Copyright (c) 2018 Paulo Alcantara <palcantara@suse.de>
8 #ifndef _CIFS_DFS_CACHE_H
9 #define _CIFS_DFS_CACHE_H
11 #include <linux/nls.h>
12 #include <linux/list.h>
15 struct dfs_cache_tgt_list {
17 struct list_head tl_list;
20 struct dfs_cache_tgt_iterator {
22 struct list_head it_list;
25 extern int dfs_cache_init(void);
26 extern void dfs_cache_destroy(void);
27 extern const struct file_operations dfscache_proc_fops;
29 extern int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
30 const struct nls_table *nls_codepage, int remap,
31 const char *path, struct dfs_info3_param *ref,
32 struct dfs_cache_tgt_list *tgt_list);
33 extern int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
34 struct dfs_cache_tgt_list *tgt_list);
35 extern int dfs_cache_update_tgthint(const unsigned int xid,
37 const struct nls_table *nls_codepage,
38 int remap, const char *path,
39 const struct dfs_cache_tgt_iterator *it);
41 dfs_cache_noreq_update_tgthint(const char *path,
42 const struct dfs_cache_tgt_iterator *it);
43 extern int dfs_cache_get_tgt_referral(const char *path,
44 const struct dfs_cache_tgt_iterator *it,
45 struct dfs_info3_param *ref);
46 extern int dfs_cache_add_vol(struct smb_vol *vol, const char *fullpath);
47 extern int dfs_cache_update_vol(const char *fullpath,
48 struct TCP_Server_Info *server);
49 extern void dfs_cache_del_vol(const char *fullpath);
51 static inline struct dfs_cache_tgt_iterator *
52 dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
53 struct dfs_cache_tgt_iterator *it)
55 if (!tl || list_empty(&tl->tl_list) || !it ||
56 list_is_last(&it->it_list, &tl->tl_list))
58 return list_next_entry(it, it_list);
61 static inline struct dfs_cache_tgt_iterator *
62 dfs_cache_get_tgt_iterator(struct dfs_cache_tgt_list *tl)
66 return list_first_entry_or_null(&tl->tl_list,
67 struct dfs_cache_tgt_iterator,
71 static inline void dfs_cache_free_tgts(struct dfs_cache_tgt_list *tl)
73 struct dfs_cache_tgt_iterator *it, *nit;
75 if (!tl || list_empty(&tl->tl_list))
77 list_for_each_entry_safe(it, nit, &tl->tl_list, it_list) {
78 list_del(&it->it_list);
85 static inline const char *
86 dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it)
88 return it ? it->it_name : NULL;
92 dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl)
94 return tl ? tl->tl_numtgts : 0;
97 #endif /* _CIFS_DFS_CACHE_H */