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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Functions to handle the cached directory entries
4 *
5 * Copyright (c) 2022, Ronnie Sahlberg <lsahlber@redhat.com>
6 */
7
8#ifndef _CACHED_DIR_H
9#define _CACHED_DIR_H
10
11
12struct cached_dirent {
13 struct list_head entry;
14 char *name;
15 int namelen;
16 loff_t pos;
17
18 struct cifs_fattr fattr;
19};
20
21struct cached_dirents {
22 bool is_valid:1;
23 bool is_failed:1;
24 struct dir_context *ctx; /*
25 * Only used to make sure we only take entries
26 * from a single context. Never dereferenced.
27 */
28 struct mutex de_mutex;
29 int pos; /* Expected ctx->pos */
30 struct list_head entries;
31};
32
33struct cached_fid {
34 bool is_valid:1; /* Do we have a useable root fid */
35 bool file_all_info_is_valid:1;
36 bool has_lease:1;
37 unsigned long time; /* jiffies of when lease was taken */
38 struct kref refcount;
39 struct cifs_fid fid;
40 struct mutex fid_mutex;
41 struct cifs_tcon *tcon;
42 struct dentry *dentry;
43 struct work_struct lease_break;
44 struct smb2_file_all_info file_all_info;
45 struct cached_dirents dirents;
46};
47
48extern struct cached_fid *init_cached_dir(void);
49extern void free_cached_dir(struct cifs_tcon *tcon);
50extern int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
51 const char *path,
52 struct cifs_sb_info *cifs_sb,
53 bool lookup_only, struct cached_fid **cfid);
54extern int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
55 struct dentry *dentry,
56 struct cached_fid **cfid);
57extern void close_cached_dir(struct cached_fid *cfid);
58extern void close_cached_dir_lease(struct cached_fid *cfid);
59extern void close_cached_dir_lease_locked(struct cached_fid *cfid);
60extern void close_all_cached_dirs(struct cifs_sb_info *cifs_sb);
61extern void invalidate_all_cached_dirs(struct cifs_tcon *tcon);
62extern int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16]);
63
64#endif /* _CACHED_DIR_H */