summaryrefslogtreecommitdiffstats
path: root/fs/smb/server/vfs_cache.h
blob: fcb13413fa8d9366c12e5a0d506412d3e8159060 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *   Copyright (C) 2019 Samsung Electronics Co., Ltd.
 */

#ifndef __VFS_CACHE_H__
#define __VFS_CACHE_H__

#include <linux/file.h>
#include <linux/fs.h>
#include <linux/rwsem.h>
#include <linux/spinlock.h>
#include <linux/idr.h>
#include <linux/workqueue.h>

#include "vfs.h"

/* Windows style file permissions for extended response */
#define	FILE_GENERIC_ALL	0x1F01FF
#define	FILE_GENERIC_READ	0x120089
#define	FILE_GENERIC_WRITE	0x120116
#define	FILE_GENERIC_EXECUTE	0X1200a0

#define KSMBD_START_FID		0
#define KSMBD_NO_FID		(INT_MAX)
#define SMB2_NO_FID		(0xFFFFFFFFFFFFFFFFULL)

struct ksmbd_conn;
struct ksmbd_session;

struct ksmbd_lock {
	struct file_lock *fl;
	struct list_head clist;
	struct list_head flist;
	struct list_head llist;
	unsigned int flags;
	int cmd;
	int zero_len;
	unsigned long long start;
	unsigned long long end;
};

struct stream {
	char *name;
	ssize_t size;
};

struct ksmbd_inode {
	rwlock_t			m_lock;
	atomic_t			m_count;
	atomic_t			op_count;
	/* opinfo count for streams */
	atomic_t			sop_count;
	struct inode			*m_inode;
	unsigned int			m_flags;
	struct hlist_node		m_hash;
	struct list_head		m_fp_list;
	struct list_head		m_op_list;
	struct oplock_info		*m_opinfo;
	__le32				m_fattr;
};

struct ksmbd_file {
	struct file			*filp;
	u64				persistent_id;
	u64				volatile_id;

	spinlock_t			f_lock;

	struct ksmbd_inode		*f_ci;
	struct ksmbd_inode		*f_parent_ci;
	struct oplock_info __rcu	*f_opinfo;
	struct ksmbd_conn		*conn;
	struct ksmbd_tree_connect	*tcon;

	atomic_t			refcount;
	__le32				daccess;
	__le32				saccess;
	__le32				coption;
	__le32				cdoption;
	__u64				create_time;
	__u64				itime;

	bool				is_nt_open;
	bool				attrib_only;

	char				client_guid[16];
	char				create_guid[16];
	char				app_instance_id[16];

	struct stream			stream;
	struct list_head		node;
	struct list_head		blocked_works;
	struct list_head		lock_list;

	int				durable_timeout;

	/* if ls is happening on directory, below is valid*/
	struct ksmbd_readdir_data	readdir_data;
	int				dot_dotdot[2];
};

static inline void set_ctx_actor(struct dir_context *ctx,
				 filldir_t actor)
{
	ctx->actor = actor;
}

#define KSMBD_NR_OPEN_DEFAULT BITS_PER_LONG

struct ksmbd_file_table {
	rwlock_t		lock;
	struct idr		*idr;
};

static inline bool has_file_id(u64 id)
{
	return id < KSMBD_NO_FID;
}

static inline bool ksmbd_stream_fd(struct ksmbd_file *fp)
{
	return fp->stream.name != NULL;
}

int ksmbd_init_file_table(struct ksmbd_file_table *ft);
void ksmbd_destroy_file_table(struct ksmbd_file_table *ft);
int ksmbd_close_fd(struct ksmbd_work *work, u64 id);
struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, u64 id);
struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, u64 id);
struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, u64 id,
					u64 pid);
void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp);
struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id);
struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid);
struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode);
unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp);
struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp);
void ksmbd_close_tree_conn_fds(struct ksmbd_work *work);
void ksmbd_close_session_fds(struct ksmbd_work *work);
int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode);
int ksmbd_init_global_file_table(void);
void ksmbd_free_global_file_table(void);
void ksmbd_set_fd_limit(unsigned long limit);

/*
 * INODE hash
 */
int __init ksmbd_inode_hash_init(void);
void ksmbd_release_inode_hash(void);

enum KSMBD_INODE_STATUS {
	KSMBD_INODE_STATUS_OK,
	KSMBD_INODE_STATUS_UNKNOWN,
	KSMBD_INODE_STATUS_PENDING_DELETE,
};

int ksmbd_query_inode_status(struct inode *inode);
bool ksmbd_inode_pending_delete(struct ksmbd_file *fp);
void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp);
void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp);
void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp,
				  int file_info);
int ksmbd_init_file_cache(void);
void ksmbd_exit_file_cache(void);
#endif /* __VFS_CACHE_H__ */