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54be1f6c PA |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* | |
3 | * DFS referral cache routines | |
4 | * | |
5072010c | 5 | * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de> |
54be1f6c PA |
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 | ||
15 | struct dfs_cache_tgt_list { | |
16 | int tl_numtgts; | |
17 | struct list_head tl_list; | |
18 | }; | |
19 | ||
20 | struct dfs_cache_tgt_iterator { | |
21 | char *it_name; | |
22 | struct list_head it_list; | |
23 | }; | |
24 | ||
25 | extern int dfs_cache_init(void); | |
26 | extern void dfs_cache_destroy(void); | |
97a32539 | 27 | extern const struct proc_ops dfscache_proc_ops; |
54be1f6c PA |
28 | |
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, | |
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); | |
40 | extern int | |
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); | |
5072010c PAS |
46 | extern int dfs_cache_add_vol(char *mntdata, struct smb_vol *vol, |
47 | const char *fullpath); | |
54be1f6c PA |
48 | extern int dfs_cache_update_vol(const char *fullpath, |
49 | struct TCP_Server_Info *server); | |
50 | extern void dfs_cache_del_vol(const char *fullpath); | |
51 | ||
bacd704a PAS |
52 | extern int dfs_cache_get_tgt_share(const struct dfs_cache_tgt_iterator *it, |
53 | const char **share, size_t *share_len, | |
54 | const char **prefix, size_t *prefix_len); | |
55 | ||
54be1f6c PA |
56 | static inline struct dfs_cache_tgt_iterator * |
57 | dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl, | |
58 | struct dfs_cache_tgt_iterator *it) | |
59 | { | |
60 | if (!tl || list_empty(&tl->tl_list) || !it || | |
61 | list_is_last(&it->it_list, &tl->tl_list)) | |
62 | return NULL; | |
63 | return list_next_entry(it, it_list); | |
64 | } | |
65 | ||
66 | static inline struct dfs_cache_tgt_iterator * | |
67 | dfs_cache_get_tgt_iterator(struct dfs_cache_tgt_list *tl) | |
68 | { | |
69 | if (!tl) | |
70 | return NULL; | |
71 | return list_first_entry_or_null(&tl->tl_list, | |
72 | struct dfs_cache_tgt_iterator, | |
73 | it_list); | |
74 | } | |
75 | ||
76 | static inline void dfs_cache_free_tgts(struct dfs_cache_tgt_list *tl) | |
77 | { | |
78 | struct dfs_cache_tgt_iterator *it, *nit; | |
79 | ||
80 | if (!tl || list_empty(&tl->tl_list)) | |
81 | return; | |
82 | list_for_each_entry_safe(it, nit, &tl->tl_list, it_list) { | |
83 | list_del(&it->it_list); | |
84 | kfree(it->it_name); | |
85 | kfree(it); | |
86 | } | |
87 | tl->tl_numtgts = 0; | |
88 | } | |
89 | ||
90 | static inline const char * | |
91 | dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it) | |
92 | { | |
93 | return it ? it->it_name : NULL; | |
94 | } | |
95 | ||
96 | static inline int | |
97 | dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl) | |
98 | { | |
99 | return tl ? tl->tl_numtgts : 0; | |
100 | } | |
101 | ||
102 | #endif /* _CIFS_DFS_CACHE_H */ |