share_config.h

 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_work;
15
16struct ksmbd_share_config {
17	char			*name;
18	char			*path;
19
20	unsigned int		path_sz;
21	unsigned int		flags;
22	struct list_head	veto_list;
23
24	struct path		vfs_path;
25
26	atomic_t		refcount;
27	struct hlist_node	hlist;
28	unsigned short		create_mask;
29	unsigned short		directory_mask;
30	unsigned short		force_create_mode;
31	unsigned short		force_directory_mode;
32	unsigned short		force_uid;
33	unsigned short		force_gid;
34};
35
36#define KSMBD_SHARE_INVALID_UID	((__u16)-1)
37#define KSMBD_SHARE_INVALID_GID	((__u16)-1)
38
39static inline umode_t
40share_config_create_mode(struct ksmbd_share_config *share,
41			 umode_t posix_mode)
42{
43	umode_t mode = (posix_mode ?: (umode_t)-1) & share->create_mask;
44
45	return mode | share->force_create_mode;
46}
47
48static inline umode_t
49share_config_directory_mode(struct ksmbd_share_config *share,
50			    umode_t posix_mode)
51{
52	umode_t mode = (posix_mode ?: (umode_t)-1) & share->directory_mask;
53
54	return mode | share->force_directory_mode;
55}
56
57static inline int test_share_config_flag(struct ksmbd_share_config *share,
58					 int flag)
59{
60	return share->flags & flag;
61}
62
63void ksmbd_share_config_del(struct ksmbd_share_config *share);
64void __ksmbd_share_config_put(struct ksmbd_share_config *share);
65
66static inline void ksmbd_share_config_put(struct ksmbd_share_config *share)
67{
68	if (!atomic_dec_and_test(&share->refcount))
69		return;
70	__ksmbd_share_config_put(share);
71}
72
73struct ksmbd_share_config *ksmbd_share_config_get(struct ksmbd_work *work,
74						  const char *name);
75bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
76			       const char *filename);
77#endif /* __SHARE_CONFIG_MANAGEMENT_H__ */