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 uint32_t brl_num_read_oplocks(const struct byte_range_lock *brl);
  34 void brl_set_num_read_oplocks(struct byte_range_lock *brl,
  35                               uint32_t num_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_check_default(files_struct *fsp,
 109                                struct lock_struct *plock);
 110 NTSTATUS query_lock(files_struct *fsp,
 111                         uint64_t *psmblctx,
 112                         uint64_t *pcount,
 113                         uint64_t *poffset,
 114                         enum brl_type *plock_type,
 115                         enum brl_flavour lock_flav);
 116 struct byte_range_lock *do_lock(struct messaging_context *msg_ctx,
 117                         files_struct *fsp,
 118                         uint64_t smblctx,
 119                         uint64_t count,
 120                         uint64_t offset,
 121                         enum brl_type lock_type,
 122                         enum brl_flavour lock_flav,
 123                         bool blocking_lock,
 124                         NTSTATUS *perr,
 125                         uint64_t *psmblctx);
 126 NTSTATUS do_unlock(struct messaging_context *msg_ctx,
 127                         files_struct *fsp,
 128                         uint64_t smblctx,
 129                         uint64_t count,
 130                         uint64_t offset,
 131                         enum brl_flavour lock_flav);
 132 NTSTATUS do_lock_cancel(files_struct *fsp,
 133                         uint64_t smblctx,
 134                         uint64_t count,
 135                         uint64_t offset,
 136                         enum brl_flavour lock_flav);
 137 void locking_close_file(struct messaging_context *msg_ctx,
 138                         files_struct *fsp,
 139                         enum file_close_type close_type);
 140 bool locking_init(void);
 141 bool locking_init_readonly(void);
 142 bool locking_end(void);
 143 char *share_mode_str(TALLOC_CTX *ctx, int num, const struct share_mode_entry *e);
 144 struct share_mode_lock *get_existing_share_mode_lock(TALLOC_CTX *mem_ctx,
 145                                                      struct file_id id);
 146 struct share_mode_lock *get_share_mode_lock(
 147         TALLOC_CTX *mem_ctx,
 148         struct file_id id,
 149         const char *servicepath,
 150         const struct smb_filename *smb_fname,
 151         const struct timespec *old_write_time);
 152 struct share_mode_lock *fetch_share_mode_unlocked(TALLOC_CTX *mem_ctx,
 153                                                   struct file_id id);
 154 struct tevent_req *fetch_share_mode_send(TALLOC_CTX *mem_ctx,
 155                                          struct tevent_context *ev,
 156                                          struct file_id id,
 157                                          bool *queued);
 158 NTSTATUS fetch_share_mode_recv(struct tevent_req *req,
 159                                TALLOC_CTX *mem_ctx,
 160                                struct share_mode_lock **_lck);
 161 bool rename_share_filename(struct messaging_context *msg_ctx,
 162                         struct share_mode_lock *lck,
 163                         struct file_id id,
 164                         const char *servicepath,
 165                         uint32_t orig_name_hash,
 166                         uint32_t new_name_hash,
 167                         const struct smb_filename *smb_fname);
 168 void get_file_infos(struct file_id id,
 169                     uint32_t name_hash,
 170                     bool *delete_on_close,
 171                     struct timespec *write_time);
 172 bool is_valid_share_mode_entry(const struct share_mode_entry *e);
 173 bool share_mode_stale_pid(struct share_mode_data *d, uint32_t idx);
 174 bool set_share_mode(struct share_mode_lock *lck, struct files_struct *fsp,
 175                     uid_t uid, uint64_t mid, uint16_t op_type,
 176                     uint32_t lease_idx);
 177 struct share_mode_entry *find_share_mode_entry(struct share_mode_lock *lck,
 178                                                files_struct *fsp);
 179 void remove_stale_share_mode_entries(struct share_mode_data *d);
 180 bool del_share_mode(struct share_mode_lock *lck, files_struct *fsp);
 181 bool mark_share_mode_disconnected(struct share_mode_lock *lck,
 182                                   struct files_struct *fsp);
 183 bool remove_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
 184 bool downgrade_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
 185 struct share_mode_lease;
 186 NTSTATUS downgrade_share_lease(struct smbd_server_connection *sconn,
 187                                struct share_mode_lock *lck,
 188                                const struct smb2_lease_key *key,
 189                                uint32_t new_lease_state,
 190                                struct share_mode_lease **_l);
 191 bool get_delete_on_close_token(struct share_mode_lock *lck,
 192                                 uint32_t name_hash,
 193                                 const struct security_token **pp_nt_tok,
 194                                 const struct security_unix_token **pp_tok);
 195 void reset_delete_on_close_lck(files_struct *fsp,
 196                                struct share_mode_lock *lck);
 197 void set_delete_on_close_lck(files_struct *fsp,
 198                         struct share_mode_lock *lck,
 199                         const struct security_token *nt_tok,
 200                         const struct security_unix_token *tok);
 201 bool set_delete_on_close(files_struct *fsp, bool delete_on_close,
 202                         const struct security_token *nt_tok,
 203                         const struct security_unix_token *tok);
 204 bool is_delete_on_close_set(struct share_mode_lock *lck, uint32_t name_hash);
 205 bool set_sticky_write_time(struct file_id fileid, struct timespec write_time);
 206 bool set_write_time(struct file_id fileid, struct timespec write_time);
 207 struct timespec get_share_mode_write_time(struct share_mode_lock *lck);
 208 bool file_has_open_streams(files_struct *fsp);
 209 int share_mode_forall(int (*fn)(struct file_id fid,
 210                                 const struct share_mode_data *data,
 211                                 void *private_data),
 212                       void *private_data);
 213 int share_entry_forall(int (*fn)(const struct share_mode_entry *,
 214                                  const char *, const char *,
 215                                  const char *, void *),
 216                       void *private_data);
 217 bool share_mode_cleanup_disconnected(struct file_id id,
 218                                      uint64_t open_persistent_id);
 219
 220
 221 /* The following definitions come from locking/posix.c  */
 222
 223 bool is_posix_locked(files_struct *fsp,
 224                         uint64_t *pu_offset,
 225                         uint64_t *pu_count,
 226                         enum brl_type *plock_type,
 227                         enum brl_flavour lock_flav);
 228 bool posix_locking_init(bool read_only);
 229 bool posix_locking_end(void);
 230 int fd_close_posix(const struct files_struct *fsp);
 231 bool set_posix_lock_windows_flavour(files_struct *fsp,
 232                         uint64_t u_offset,
 233                         uint64_t u_count,
 234                         enum brl_type lock_type,
 235                         const struct lock_context *lock_ctx,
 236                         const struct lock_struct *plocks,
 237                         int num_locks,
 238                         int *errno_ret);
 239 bool release_posix_lock_windows_flavour(files_struct *fsp,
 240                                 uint64_t u_offset,
 241                                 uint64_t u_count,
 242                                 enum brl_type deleted_lock_type,
 243                                 const struct lock_context *lock_ctx,
 244                                 const struct lock_struct *plocks,
 245                                 int num_locks);
 246 bool set_posix_lock_posix_flavour(files_struct *fsp,
 247                         uint64_t u_offset,
 248                         uint64_t u_count,
 249                         enum brl_type lock_type,
 250                         const struct lock_context *lock_ctx,
 251                         int *errno_ret);
 252 bool release_posix_lock_posix_flavour(files_struct *fsp,
 253                                 uint64_t u_offset,
 254                                 uint64_t u_count,
 255                                 const struct lock_context *lock_ctx,
 256                                 const struct lock_struct *plocks,
 257                                 int num_locks);
 258
 259 /* The following definitions come from locking/leases_util.c */
 260 uint32_t map_oplock_to_lease_type(uint16_t op_type);
 261 uint32_t fsp_lease_type(const struct files_struct *fsp);
 262 uint32_t lease_type_is_exclusive(uint32_t lease_type);
 263 bool fsp_lease_type_is_exclusive(const struct files_struct *fsp);
 264
 265 #endif /* _LOCKING_PROTO_H_ */