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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 | ||
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); | |
27 | extern const struct file_operations dfscache_proc_fops; | |
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); | |
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); | |
50 | ||
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) | |
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 | ||
61 | static inline struct dfs_cache_tgt_iterator * | |
62 | dfs_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 | ||
71 | static 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 | ||
85 | static inline const char * | |
86 | dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it) | |
87 | { | |
88 | return it ? it->it_name : NULL; | |
89 | } | |
90 | ||
91 | static inline int | |
92 | dfs_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 */ |