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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2019 Samsung Electronics Co., Ltd.
4 */
5
6#ifndef __VFS_CACHE_H__
7#define __VFS_CACHE_H__
8
9#include <linux/file.h>
10#include <linux/fs.h>
11#include <linux/rwsem.h>
12#include <linux/spinlock.h>
13#include <linux/idr.h>
14#include <linux/workqueue.h>
15
16#include "vfs.h"
17
18/* Windows style file permissions for extended response */
19#define FILE_GENERIC_ALL 0x1F01FF
20#define FILE_GENERIC_READ 0x120089
21#define FILE_GENERIC_WRITE 0x120116
22#define FILE_GENERIC_EXECUTE 0X1200a0
23
24#define KSMBD_START_FID 0
25#define KSMBD_NO_FID (INT_MAX)
26#define SMB2_NO_FID (0xFFFFFFFFFFFFFFFFULL)
27
28struct ksmbd_conn;
29struct ksmbd_session;
30
31struct ksmbd_lock {
32 struct file_lock *fl;
33 struct list_head clist;
34 struct list_head flist;
35 struct list_head llist;
36 unsigned int flags;
37 int cmd;
38 int zero_len;
39 unsigned long long start;
40 unsigned long long end;
41};
42
43struct stream {
44 char *name;
45 ssize_t size;
46};
47
48struct ksmbd_inode {
49 rwlock_t m_lock;
50 atomic_t m_count;
51 atomic_t op_count;
52 /* opinfo count for streams */
53 atomic_t sop_count;
54 struct inode *m_inode;
55 unsigned int m_flags;
56 struct hlist_node m_hash;
57 struct list_head m_fp_list;
58 struct list_head m_op_list;
59 struct oplock_info *m_opinfo;
60 __le32 m_fattr;
61};
62
63enum {
64 FP_NEW = 0,
65 FP_INITED,
66 FP_CLOSED
67};
68
69struct ksmbd_file {
70 struct file *filp;
71 u64 persistent_id;
72 u64 volatile_id;
73
74 spinlock_t f_lock;
75
76 struct ksmbd_inode *f_ci;
77 struct ksmbd_inode *f_parent_ci;
78 struct oplock_info __rcu *f_opinfo;
79 struct ksmbd_conn *conn;
80 struct ksmbd_tree_connect *tcon;
81
82 atomic_t refcount;
83 __le32 daccess;
84 __le32 saccess;
85 __le32 coption;
86 __le32 cdoption;
87 __u64 create_time;
88 __u64 itime;
89
90 bool is_nt_open;
91 bool attrib_only;
92
93 char client_guid[16];
94 char create_guid[16];
95 char app_instance_id[16];
96
97 struct stream stream;
98 struct list_head node;
99 struct list_head blocked_works;
100 struct list_head lock_list;
101
102 int durable_timeout;
103
104 /* if ls is happening on directory, below is valid*/
105 struct ksmbd_readdir_data readdir_data;
106 int dot_dotdot[2];
107 unsigned int f_state;
108};
109
110static inline void set_ctx_actor(struct dir_context *ctx,
111 filldir_t actor)
112{
113 ctx->actor = actor;
114}
115
116#define KSMBD_NR_OPEN_DEFAULT BITS_PER_LONG
117
118struct ksmbd_file_table {
119 rwlock_t lock;
120 struct idr *idr;
121};
122
123static inline bool has_file_id(u64 id)
124{
125 return id < KSMBD_NO_FID;
126}
127
128static inline bool ksmbd_stream_fd(struct ksmbd_file *fp)
129{
130 return fp->stream.name != NULL;
131}
132
133int ksmbd_init_file_table(struct ksmbd_file_table *ft);
134void ksmbd_destroy_file_table(struct ksmbd_file_table *ft);
135int ksmbd_close_fd(struct ksmbd_work *work, u64 id);
136struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, u64 id);
137struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, u64 id);
138struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, u64 id,
139 u64 pid);
140void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp);
141struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id);
142struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid);
143struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode);
144unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp);
145struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp);
146void ksmbd_close_tree_conn_fds(struct ksmbd_work *work);
147void ksmbd_close_session_fds(struct ksmbd_work *work);
148int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode);
149int ksmbd_init_global_file_table(void);
150void ksmbd_free_global_file_table(void);
151void ksmbd_set_fd_limit(unsigned long limit);
152void ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp,
153 unsigned int state);
154
155/*
156 * INODE hash
157 */
158int __init ksmbd_inode_hash_init(void);
159void ksmbd_release_inode_hash(void);
160
161enum KSMBD_INODE_STATUS {
162 KSMBD_INODE_STATUS_OK,
163 KSMBD_INODE_STATUS_UNKNOWN,
164 KSMBD_INODE_STATUS_PENDING_DELETE,
165};
166
167int ksmbd_query_inode_status(struct inode *inode);
168bool ksmbd_inode_pending_delete(struct ksmbd_file *fp);
169void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp);
170void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp);
171void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp,
172 int file_info);
173int ksmbd_init_file_cache(void);
174void ksmbd_exit_file_cache(void);
175#endif /* __VFS_CACHE_H__ */