44f3ba13e0839b9a56fd4215ac73567b3c5a11bf
[samba.git] / source3 / locking / proto.h
1 /*
2  *  Unix SMB/CIFS implementation.
3  *  Locking functions
4  *
5  *  Copyright (C) Andrew Tridgell       1992-2000
6  *  Copyright (C) Jeremy Allison        1992-2006
7  *  Copyright (C) Volker Lendecke       2005
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 3 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
21  */
22
23 #ifndef _LOCKING_PROTO_H_
24 #define _LOCKING_PROTO_H_
25
26 /* The following definitions come from locking/brlock.c  */
27
28 void brl_init(bool read_only);
29 void brl_shutdown(void);
30
31 unsigned int brl_num_locks(const struct byte_range_lock *brl);
32 struct files_struct *brl_fsp(struct byte_range_lock *brl);
33 bool brl_have_read_oplocks(const struct byte_range_lock *brl);
34 void brl_set_have_read_oplocks(struct byte_range_lock *brl,
35                                bool have_read_oplocks);
36
37 NTSTATUS brl_lock_windows_default(struct byte_range_lock *br_lck,
38                 struct lock_struct *plock,
39                 bool blocking_lock);
40
41 NTSTATUS brl_lock(struct messaging_context *msg_ctx,
42                 struct byte_range_lock *br_lck,
43                 uint64_t smblctx,
44                 struct server_id pid,
45                 br_off start,
46                 br_off size,
47                 enum brl_type lock_type,
48                 enum brl_flavour lock_flav,
49                 bool blocking_lock,
50                 uint64_t *psmblctx);
51 bool brl_unlock(struct messaging_context *msg_ctx,
52                 struct byte_range_lock *br_lck,
53                 uint64_t smblctx,
54                 struct server_id pid,
55                 br_off start,
56                 br_off size,
57                 enum brl_flavour lock_flav);
58 bool brl_unlock_windows_default(struct messaging_context *msg_ctx,
59                                struct byte_range_lock *br_lck,
60                                const struct lock_struct *plock);
61 bool brl_locktest(struct byte_range_lock *br_lck,
62                   const struct lock_struct *rw_probe);
63 NTSTATUS brl_lockquery(struct byte_range_lock *br_lck,
64                 uint64_t *psmblctx,
65                 struct server_id pid,
66                 br_off *pstart,
67                 br_off *psize,
68                 enum brl_type *plock_type,
69                 enum brl_flavour lock_flav);
70 bool brl_lock_cancel(struct byte_range_lock *br_lck,
71                 uint64_t smblctx,
72                 struct server_id pid,
73                 br_off start,
74                 br_off size,
75                 enum brl_flavour lock_flav);
76 bool brl_lock_cancel_default(struct byte_range_lock *br_lck,
77                 struct lock_struct *plock);
78 bool brl_mark_disconnected(struct files_struct *fsp);
79 bool brl_reconnect_disconnected(struct files_struct *fsp);
80 void brl_close_fnum(struct messaging_context *msg_ctx,
81                     struct byte_range_lock *br_lck);
82 int brl_forall(void (*fn)(struct file_id id, struct server_id pid,
83                           enum brl_type lock_type,
84                           enum brl_flavour lock_flav,
85                           br_off start, br_off size,
86                           void *private_data),
87                void *private_data);
88 struct byte_range_lock *brl_get_locks(TALLOC_CTX *mem_ctx,
89                                         files_struct *fsp);
90 struct byte_range_lock *brl_get_locks_readonly(files_struct *fsp);
91 void brl_revalidate(struct messaging_context *msg_ctx,
92                     void *private_data,
93                     uint32_t msg_type,
94                     struct server_id server_id,
95                     DATA_BLOB *data);
96 bool brl_cleanup_disconnected(struct file_id fid, uint64_t open_persistent_id);
97
98 /* The following definitions come from locking/locking.c  */
99
100 const char *lock_type_name(enum brl_type lock_type);
101 const char *lock_flav_name(enum brl_flavour lock_flav);
102 void init_strict_lock_struct(files_struct *fsp,
103                                 uint64_t smblctx,
104                                 br_off start,
105                                 br_off size,
106                                 enum brl_type lock_type,
107                                 struct lock_struct *plock);
108 bool strict_lock_default(files_struct *fsp,
109                                 struct lock_struct *plock);
110 void strict_unlock_default(files_struct *fsp,
111                                 struct lock_struct *plock);
112 NTSTATUS query_lock(files_struct *fsp,
113                         uint64_t *psmblctx,
114                         uint64_t *pcount,
115                         uint64_t *poffset,
116                         enum brl_type *plock_type,
117                         enum brl_flavour lock_flav);
118 struct byte_range_lock *do_lock(struct messaging_context *msg_ctx,
119                         files_struct *fsp,
120                         uint64_t smblctx,
121                         uint64_t count,
122                         uint64_t offset,
123                         enum brl_type lock_type,
124                         enum brl_flavour lock_flav,
125                         bool blocking_lock,
126                         NTSTATUS *perr,
127                         uint64_t *psmblctx);
128 NTSTATUS do_unlock(struct messaging_context *msg_ctx,
129                         files_struct *fsp,
130                         uint64_t smblctx,
131                         uint64_t count,
132                         uint64_t offset,
133                         enum brl_flavour lock_flav);
134 NTSTATUS do_lock_cancel(files_struct *fsp,
135                         uint64 smblctx,
136                         uint64_t count,
137                         uint64_t offset,
138                         enum brl_flavour lock_flav);
139 void locking_close_file(struct messaging_context *msg_ctx,
140                         files_struct *fsp,
141                         enum file_close_type close_type);
142 bool locking_init(void);
143 bool locking_init_readonly(void);
144 bool locking_end(void);
145 char *share_mode_str(TALLOC_CTX *ctx, int num, const struct share_mode_entry *e);
146 struct share_mode_lock *get_existing_share_mode_lock(TALLOC_CTX *mem_ctx,
147                                                      struct file_id id);
148 struct share_mode_lock *get_share_mode_lock(
149         TALLOC_CTX *mem_ctx,
150         struct file_id id,
151         const char *servicepath,
152         const struct smb_filename *smb_fname,
153         const struct timespec *old_write_time);
154 struct share_mode_lock *fetch_share_mode_unlocked(TALLOC_CTX *mem_ctx,
155                                                   struct file_id id);
156 bool rename_share_filename(struct messaging_context *msg_ctx,
157                         struct share_mode_lock *lck,
158                         struct file_id id,
159                         const char *servicepath,
160                         uint32_t orig_name_hash,
161                         uint32_t new_name_hash,
162                         const struct smb_filename *smb_fname);
163 void get_file_infos(struct file_id id,
164                     uint32_t name_hash,
165                     bool *delete_on_close,
166                     struct timespec *write_time);
167 bool is_valid_share_mode_entry(const struct share_mode_entry *e);
168 bool share_mode_stale_pid(struct share_mode_data *d, uint32_t idx);
169 bool set_share_mode(struct share_mode_lock *lck, files_struct *fsp,
170                     uid_t uid, uint64_t mid, uint16 op_type);
171 void remove_stale_share_mode_entries(struct share_mode_data *d);
172 bool del_share_mode(struct share_mode_lock *lck, files_struct *fsp);
173 bool mark_share_mode_disconnected(struct share_mode_lock *lck,
174                                   struct files_struct *fsp);
175 bool remove_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
176 bool downgrade_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
177 bool get_delete_on_close_token(struct share_mode_lock *lck,
178                                 uint32_t name_hash,
179                                 const struct security_token **pp_nt_tok,
180                                 const struct security_unix_token **pp_tok);
181 void set_delete_on_close_lck(files_struct *fsp,
182                         struct share_mode_lock *lck,
183                         bool delete_on_close,
184                         const struct security_token *nt_tok,
185                         const struct security_unix_token *tok);
186 bool set_delete_on_close(files_struct *fsp, bool delete_on_close,
187                         const struct security_token *nt_tok,
188                         const struct security_unix_token *tok);
189 bool is_delete_on_close_set(struct share_mode_lock *lck, uint32_t name_hash);
190 bool set_sticky_write_time(struct file_id fileid, struct timespec write_time);
191 bool set_write_time(struct file_id fileid, struct timespec write_time);
192 struct timespec get_share_mode_write_time(struct share_mode_lock *lck);
193 int share_mode_forall(int (*fn)(struct file_id fid,
194                                 const struct share_mode_data *data,
195                                 void *private_data),
196                       void *private_data);
197 int share_entry_forall(int (*fn)(const struct share_mode_entry *, const char *,
198                                  const char *, void *),
199                       void *private_data);
200 bool share_mode_cleanup_disconnected(struct file_id id,
201                                      uint64_t open_persistent_id);
202
203
204 /* The following definitions come from locking/posix.c  */
205
206 bool is_posix_locked(files_struct *fsp,
207                         uint64_t *pu_offset,
208                         uint64_t *pu_count,
209                         enum brl_type *plock_type,
210                         enum brl_flavour lock_flav);
211 bool posix_locking_init(bool read_only);
212 bool posix_locking_end(void);
213 int fd_close_posix(struct files_struct *fsp);
214 bool set_posix_lock_windows_flavour(files_struct *fsp,
215                         uint64_t u_offset,
216                         uint64_t u_count,
217                         enum brl_type lock_type,
218                         const struct lock_context *lock_ctx,
219                         const struct lock_struct *plocks,
220                         int num_locks,
221                         int *errno_ret);
222 bool release_posix_lock_windows_flavour(files_struct *fsp,
223                                 uint64_t u_offset,
224                                 uint64_t u_count,
225                                 enum brl_type deleted_lock_type,
226                                 const struct lock_context *lock_ctx,
227                                 const struct lock_struct *plocks,
228                                 int num_locks);
229 bool set_posix_lock_posix_flavour(files_struct *fsp,
230                         uint64_t u_offset,
231                         uint64_t u_count,
232                         enum brl_type lock_type,
233                         int *errno_ret);
234 bool release_posix_lock_posix_flavour(files_struct *fsp,
235                                 uint64_t u_offset,
236                                 uint64_t u_count,
237                                 const struct lock_context *lock_ctx,
238                                 const struct lock_struct *plocks,
239                                 int num_locks);
240
241 #endif /* _LOCKING_PROTO_H_ */