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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * DFS referral cache routines
4 *
5 * Copyright (c) 2018 Paulo Alcantara <palcantara@suse.de>
6 */
7
8#ifndef _CIFS_DFS_CACHE_H
9#define _CIFS_DFS_CACHE_H
10
11#include <linux/nls.h>
12#include <linux/list.h>
13#include "cifsglob.h"
14
15struct dfs_cache_tgt_list {
16 int tl_numtgts;
17 struct list_head tl_list;
18};
19
20struct dfs_cache_tgt_iterator {
21 char *it_name;
22 struct list_head it_list;
23};
24
25extern int dfs_cache_init(void);
26extern void dfs_cache_destroy(void);
27extern const struct file_operations dfscache_proc_fops;
28
29extern 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);
33extern int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
34 struct dfs_cache_tgt_list *tgt_list);
35extern int dfs_cache_update_tgthint(const unsigned int xid,
36 struct cifs_ses *ses,
37 const struct nls_table *nls_codepage,
38 int remap, const char *path,
39 const struct dfs_cache_tgt_iterator *it);
40extern int
41dfs_cache_noreq_update_tgthint(const char *path,
42 const struct dfs_cache_tgt_iterator *it);
43extern int dfs_cache_get_tgt_referral(const char *path,
44 const struct dfs_cache_tgt_iterator *it,
45 struct dfs_info3_param *ref);
46extern int dfs_cache_add_vol(struct smb_vol *vol, const char *fullpath);
47extern int dfs_cache_update_vol(const char *fullpath,
48 struct TCP_Server_Info *server);
49extern void dfs_cache_del_vol(const char *fullpath);
50
51static inline struct dfs_cache_tgt_iterator *
52dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
53 struct dfs_cache_tgt_iterator *it)
54{
55 if (!tl || list_empty(&tl->tl_list) || !it ||
56 list_is_last(&it->it_list, &tl->tl_list))
57 return NULL;
58 return list_next_entry(it, it_list);
59}
60
61static inline struct dfs_cache_tgt_iterator *
62dfs_cache_get_tgt_iterator(struct dfs_cache_tgt_list *tl)
63{
64 if (!tl)
65 return NULL;
66 return list_first_entry_or_null(&tl->tl_list,
67 struct dfs_cache_tgt_iterator,
68 it_list);
69}
70
71static inline void dfs_cache_free_tgts(struct dfs_cache_tgt_list *tl)
72{
73 struct dfs_cache_tgt_iterator *it, *nit;
74
75 if (!tl || list_empty(&tl->tl_list))
76 return;
77 list_for_each_entry_safe(it, nit, &tl->tl_list, it_list) {
78 list_del(&it->it_list);
79 kfree(it->it_name);
80 kfree(it);
81 }
82 tl->tl_numtgts = 0;
83}
84
85static inline const char *
86dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it)
87{
88 return it ? it->it_name : NULL;
89}
90
91static inline int
92dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl)
93{
94 return tl ? tl->tl_numtgts : 0;
95}
96
97#endif /* _CIFS_DFS_CACHE_H */