1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
 4 */
 5
 6#ifndef __SHARE_CONFIG_MANAGEMENT_H__
 7#define __SHARE_CONFIG_MANAGEMENT_H__
 8
 9#include <linux/workqueue.h>
10#include <linux/hashtable.h>
11#include <linux/path.h>
12#include <linux/unicode.h>
13
14struct ksmbd_share_config {
15	char			*name;
16	char			*path;
17
18	unsigned int		path_sz;
19	unsigned int		flags;
20	struct list_head	veto_list;
21
22	struct path		vfs_path;
23
24	atomic_t		refcount;
25	struct hlist_node	hlist;
26	unsigned short		create_mask;
27	unsigned short		directory_mask;
28	unsigned short		force_create_mode;
29	unsigned short		force_directory_mode;
30	unsigned short		force_uid;
31	unsigned short		force_gid;
32};
33
34#define KSMBD_SHARE_INVALID_UID	((__u16)-1)
35#define KSMBD_SHARE_INVALID_GID	((__u16)-1)
36
37static inline umode_t
38share_config_create_mode(struct ksmbd_share_config *share,
39			 umode_t posix_mode)
40{
41	umode_t mode = (posix_mode ?: (umode_t)-1) & share->create_mask;
42
43	return mode | share->force_create_mode;
44}
45
46static inline umode_t
47share_config_directory_mode(struct ksmbd_share_config *share,
48			    umode_t posix_mode)
49{
50	umode_t mode = (posix_mode ?: (umode_t)-1) & share->directory_mask;
51
52	return mode | share->force_directory_mode;
53}
54
55static inline int test_share_config_flag(struct ksmbd_share_config *share,
56					 int flag)
57{
58	return share->flags & flag;
59}
60
61void ksmbd_share_config_del(struct ksmbd_share_config *share);
62void __ksmbd_share_config_put(struct ksmbd_share_config *share);
63
64static inline void ksmbd_share_config_put(struct ksmbd_share_config *share)
65{
66	if (!atomic_dec_and_test(&share->refcount))
67		return;
68	__ksmbd_share_config_put(share);
69}
70
71struct ksmbd_share_config *ksmbd_share_config_get(struct unicode_map *um,
72						  const char *name);
73bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
74			       const char *filename);
75#endif /* __SHARE_CONFIG_MANAGEMENT_H__ */