1 /* SPDX-License-Identifier: GPL-2.0-or-later * 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* 2 /*
3 * Copyright (C) 2016 Namjae Jeon <linkinjeo 3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4 * Copyright (C) 2018 Samsung Electronics Co 4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
5 */ 5 */
6 6
7 #ifndef __KSMBD_OPLOCK_H 7 #ifndef __KSMBD_OPLOCK_H
8 #define __KSMBD_OPLOCK_H 8 #define __KSMBD_OPLOCK_H
9 9
10 #include "smb_common.h" 10 #include "smb_common.h"
11 11
12 #define OPLOCK_WAIT_TIME (35 * HZ) 12 #define OPLOCK_WAIT_TIME (35 * HZ)
13 13
>> 14 /* SMB2 Oplock levels */
>> 15 #define SMB2_OPLOCK_LEVEL_NONE 0x00
>> 16 #define SMB2_OPLOCK_LEVEL_II 0x01
>> 17 #define SMB2_OPLOCK_LEVEL_EXCLUSIVE 0x08
>> 18 #define SMB2_OPLOCK_LEVEL_BATCH 0x09
>> 19 #define SMB2_OPLOCK_LEVEL_LEASE 0xFF
>> 20
14 /* Oplock states */ 21 /* Oplock states */
15 #define OPLOCK_STATE_NONE 0x00 22 #define OPLOCK_STATE_NONE 0x00
16 #define OPLOCK_ACK_WAIT 0x01 23 #define OPLOCK_ACK_WAIT 0x01
17 #define OPLOCK_CLOSING 0x02 24 #define OPLOCK_CLOSING 0x02
18 25
19 #define OPLOCK_WRITE_TO_READ 0x01 26 #define OPLOCK_WRITE_TO_READ 0x01
20 #define OPLOCK_READ_HANDLE_TO_READ 0x02 27 #define OPLOCK_READ_HANDLE_TO_READ 0x02
21 #define OPLOCK_WRITE_TO_NONE 0x04 28 #define OPLOCK_WRITE_TO_NONE 0x04
22 #define OPLOCK_READ_TO_NONE 0x08 29 #define OPLOCK_READ_TO_NONE 0x08
23 30
24 struct lease_ctx_info { 31 struct lease_ctx_info {
25 __u8 lease_key[SMB2 32 __u8 lease_key[SMB2_LEASE_KEY_SIZE];
26 __le32 req_state; 33 __le32 req_state;
27 __le32 flags; 34 __le32 flags;
28 __le64 duration; 35 __le64 duration;
29 __u8 parent_lease_k 36 __u8 parent_lease_key[SMB2_LEASE_KEY_SIZE];
30 __le16 epoch; <<
31 int version; 37 int version;
32 bool is_dir; <<
33 }; 38 };
34 39
35 struct lease_table { 40 struct lease_table {
36 char client_guid[SM 41 char client_guid[SMB2_CLIENT_GUID_SIZE];
37 struct list_head lease_list; 42 struct list_head lease_list;
38 struct list_head l_entry; 43 struct list_head l_entry;
39 spinlock_t lb_lock; 44 spinlock_t lb_lock;
40 }; 45 };
41 46
42 struct lease { 47 struct lease {
43 __u8 lease_key[SMB2 48 __u8 lease_key[SMB2_LEASE_KEY_SIZE];
44 __le32 state; 49 __le32 state;
45 __le32 new_state; 50 __le32 new_state;
46 __le32 flags; 51 __le32 flags;
47 __le64 duration; 52 __le64 duration;
48 __u8 parent_lease_k 53 __u8 parent_lease_key[SMB2_LEASE_KEY_SIZE];
49 int version; 54 int version;
50 unsigned short epoch; 55 unsigned short epoch;
51 bool is_dir; <<
52 struct lease_table *l_lb; 56 struct lease_table *l_lb;
53 }; 57 };
54 58
55 struct oplock_info { 59 struct oplock_info {
56 struct ksmbd_conn *conn; 60 struct ksmbd_conn *conn;
57 struct ksmbd_session *sess; 61 struct ksmbd_session *sess;
58 struct ksmbd_work *work; 62 struct ksmbd_work *work;
59 struct ksmbd_file *o_fp; 63 struct ksmbd_file *o_fp;
60 int level; 64 int level;
61 int op_state; 65 int op_state;
62 unsigned long pending_break; 66 unsigned long pending_break;
63 u64 fid; 67 u64 fid;
64 atomic_t breaking_cnt; 68 atomic_t breaking_cnt;
65 atomic_t refcount; 69 atomic_t refcount;
66 __u16 Tid; 70 __u16 Tid;
67 bool is_lease; 71 bool is_lease;
68 bool open_trunc; 72 bool open_trunc; /* truncate on open */
69 struct lease *o_lease; 73 struct lease *o_lease;
70 struct list_head interim_list; 74 struct list_head interim_list;
71 struct list_head op_entry; 75 struct list_head op_entry;
72 struct list_head lease_entry; 76 struct list_head lease_entry;
73 wait_queue_head_t oplock_q; /* Other s 77 wait_queue_head_t oplock_q; /* Other server threads */
74 wait_queue_head_t oplock_brk; /* oploc 78 wait_queue_head_t oplock_brk; /* oplock breaking wait */
75 struct rcu_head rcu_head; 79 struct rcu_head rcu_head;
76 }; 80 };
77 81
78 struct lease_break_info { 82 struct lease_break_info {
79 __le32 curr_state; 83 __le32 curr_state;
80 __le32 new_state; 84 __le32 new_state;
81 __le16 epoch; 85 __le16 epoch;
82 char lease_key[SMB2 86 char lease_key[SMB2_LEASE_KEY_SIZE];
83 }; 87 };
84 88
85 struct oplock_break_info { 89 struct oplock_break_info {
86 int level; 90 int level;
87 int open_trunc; 91 int open_trunc;
88 int fid; 92 int fid;
89 }; 93 };
90 94
91 int smb_grant_oplock(struct ksmbd_work *work, 95 int smb_grant_oplock(struct ksmbd_work *work, int req_op_level,
92 u64 pid, struct ksmbd_fil 96 u64 pid, struct ksmbd_file *fp, __u16 tid,
93 struct lease_ctx_info *lc 97 struct lease_ctx_info *lctx, int share_ret);
94 void smb_break_all_levII_oplock(struct ksmbd_w 98 void smb_break_all_levII_oplock(struct ksmbd_work *work,
95 struct ksmbd_f 99 struct ksmbd_file *fp, int is_trunc);
96 int opinfo_write_to_read(struct oplock_info *o 100 int opinfo_write_to_read(struct oplock_info *opinfo);
97 int opinfo_read_handle_to_read(struct oplock_i 101 int opinfo_read_handle_to_read(struct oplock_info *opinfo);
98 int opinfo_write_to_none(struct oplock_info *o 102 int opinfo_write_to_none(struct oplock_info *opinfo);
99 int opinfo_read_to_none(struct oplock_info *op 103 int opinfo_read_to_none(struct oplock_info *opinfo);
100 void close_id_del_oplock(struct ksmbd_file *fp 104 void close_id_del_oplock(struct ksmbd_file *fp);
101 void smb_break_all_oplock(struct ksmbd_work *w 105 void smb_break_all_oplock(struct ksmbd_work *work, struct ksmbd_file *fp);
102 struct oplock_info *opinfo_get(struct ksmbd_fi 106 struct oplock_info *opinfo_get(struct ksmbd_file *fp);
103 void opinfo_put(struct oplock_info *opinfo); 107 void opinfo_put(struct oplock_info *opinfo);
104 108
105 /* Lease related functions */ 109 /* Lease related functions */
106 void create_lease_buf(u8 *rbuf, struct lease * 110 void create_lease_buf(u8 *rbuf, struct lease *lease);
107 struct lease_ctx_info *parse_lease_state(void 111 struct lease_ctx_info *parse_lease_state(void *open_req);
108 __u8 smb2_map_lease_to_oplock(__le32 lease_sta 112 __u8 smb2_map_lease_to_oplock(__le32 lease_state);
109 int lease_read_to_write(struct oplock_info *op 113 int lease_read_to_write(struct oplock_info *opinfo);
110 114
111 /* Durable related functions */ 115 /* Durable related functions */
112 void create_durable_rsp_buf(char *cc); 116 void create_durable_rsp_buf(char *cc);
113 void create_durable_v2_rsp_buf(char *cc, struc 117 void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp);
114 void create_mxac_rsp_buf(char *cc, int maximal 118 void create_mxac_rsp_buf(char *cc, int maximal_access);
115 void create_disk_id_rsp_buf(char *cc, __u64 fi 119 void create_disk_id_rsp_buf(char *cc, __u64 file_id, __u64 vol_id);
116 void create_posix_rsp_buf(char *cc, struct ksm 120 void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp);
117 struct create_context *smb2_find_context_vals( 121 struct create_context *smb2_find_context_vals(void *open_req, const char *tag, int tag_len);
118 struct oplock_info *lookup_lease_in_table(stru 122 struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn,
119 char 123 char *lease_key);
120 int find_same_lease_key(struct ksmbd_session * 124 int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,
121 struct lease_ctx_info 125 struct lease_ctx_info *lctx);
122 void destroy_lease_table(struct ksmbd_conn *co 126 void destroy_lease_table(struct ksmbd_conn *conn);
123 void smb_send_parent_lease_break_noti(struct k <<
124 struct l <<
125 void smb_lazy_parent_lease_break_close(struct <<
126 int smb2_check_durable_oplock(struct ksmbd_con <<
127 struct ksmbd_sha <<
128 struct ksmbd_fil <<
129 struct lease_ctx <<
130 char *name); <<
131 #endif /* __KSMBD_OPLOCK_H */ 127 #endif /* __KSMBD_OPLOCK_H */
132 128
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