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 bool brl_same_context(const struct lock_context *ctx1,
  29                              const struct lock_context *ctx2);
  30 NTSTATUS brl_lock_failed(files_struct *fsp, const struct lock_struct *lock, bool blocking_lock);
  31 void brl_init(bool read_only);
  32 void brl_shutdown(void);
  33
  34 NTSTATUS brl_lock_windows_default(struct byte_range_lock *br_lck,
  35                 struct lock_struct *plock,
  36                 bool blocking_lock);
  37
  38 NTSTATUS brl_lock(struct messaging_context *msg_ctx,
  39                 struct byte_range_lock *br_lck,
  40                 uint64_t smblctx,
  41                 struct server_id pid,
  42                 br_off start,
  43                 br_off size,
  44                 enum brl_type lock_type,
  45                 enum brl_flavour lock_flav,
  46                 bool blocking_lock,
  47                 uint64_t *psmblctx,
  48                 struct blocking_lock_record *blr);
  49 bool brl_unlock(struct messaging_context *msg_ctx,
  50                 struct byte_range_lock *br_lck,
  51                 uint64_t smblctx,
  52                 struct server_id pid,
  53                 br_off start,
  54                 br_off size,
  55                 enum brl_flavour lock_flav);
  56 bool brl_unlock_windows_default(struct messaging_context *msg_ctx,
  57                                struct byte_range_lock *br_lck,
  58                                const struct lock_struct *plock);
  59 bool brl_locktest(struct byte_range_lock *br_lck,
  60                 uint64_t smblctx,
  61                 struct server_id pid,
  62                 br_off start,
  63                 br_off size,
  64                 enum brl_type lock_type,
  65                 enum brl_flavour lock_flav);
  66 NTSTATUS brl_lockquery(struct byte_range_lock *br_lck,
  67                 uint64_t *psmblctx,
  68                 struct server_id pid,
  69                 br_off *pstart,
  70                 br_off *psize,
  71                 enum brl_type *plock_type,
  72                 enum brl_flavour lock_flav);
  73 bool brl_lock_cancel(struct byte_range_lock *br_lck,
  74                 uint64_t smblctx,
  75                 struct server_id pid,
  76                 br_off start,
  77                 br_off size,
  78                 enum brl_flavour lock_flav,
  79                 struct blocking_lock_record *blr);
  80 bool brl_lock_cancel_default(struct byte_range_lock *br_lck,
  81                 struct lock_struct *plock);
  82 bool brl_mark_disconnected(struct files_struct *fsp);
  83 bool brl_reconnect_disconnected(struct files_struct *fsp);
  84 void brl_close_fnum(struct messaging_context *msg_ctx,
  85                     struct byte_range_lock *br_lck);
  86 int brl_forall(void (*fn)(struct file_id id, struct server_id pid,
  87                           enum brl_type lock_type,
  88                           enum brl_flavour lock_flav,
  89                           br_off start, br_off size,
  90                           void *private_data),
  91                void *private_data);
  92 struct byte_range_lock *brl_get_locks(TALLOC_CTX *mem_ctx,
  93                                         files_struct *fsp);
  94 struct byte_range_lock *brl_get_locks_readonly(files_struct *fsp);
  95 void brl_revalidate(struct messaging_context *msg_ctx,
  96                     void *private_data,
  97                     uint32_t msg_type,
  98                     struct server_id server_id,
  99                     DATA_BLOB *data);
 100
 101 /* The following definitions come from locking/locking.c  */
 102
 103 const char *lock_type_name(enum brl_type lock_type);
 104 const char *lock_flav_name(enum brl_flavour lock_flav);
 105 void init_strict_lock_struct(files_struct *fsp,
 106                                 uint64_t smblctx,
 107                                 br_off start,
 108                                 br_off size,
 109                                 enum brl_type lock_type,
 110                                 struct lock_struct *plock);
 111 bool strict_lock_default(files_struct *fsp,
 112                                 struct lock_struct *plock);
 113 void strict_unlock_default(files_struct *fsp,
 114                                 struct lock_struct *plock);
 115 NTSTATUS query_lock(files_struct *fsp,
 116                         uint64_t *psmblctx,
 117                         uint64_t *pcount,
 118                         uint64_t *poffset,
 119                         enum brl_type *plock_type,
 120                         enum brl_flavour lock_flav);
 121 struct byte_range_lock *do_lock(struct messaging_context *msg_ctx,
 122                         files_struct *fsp,
 123                         uint64_t smblctx,
 124                         uint64_t count,
 125                         uint64_t offset,
 126                         enum brl_type lock_type,
 127                         enum brl_flavour lock_flav,
 128                         bool blocking_lock,
 129                         NTSTATUS *perr,
 130                         uint64_t *psmblctx,
 131                         struct blocking_lock_record *blr);
 132 NTSTATUS do_unlock(struct messaging_context *msg_ctx,
 133                         files_struct *fsp,
 134                         uint64_t smblctx,
 135                         uint64_t count,
 136                         uint64_t offset,
 137                         enum brl_flavour lock_flav);
 138 NTSTATUS do_lock_cancel(files_struct *fsp,
 139                         uint64 smblctx,
 140                         uint64_t count,
 141                         uint64_t offset,
 142                         enum brl_flavour lock_flav,
 143                         struct blocking_lock_record *blr);
 144 void locking_close_file(struct messaging_context *msg_ctx,
 145                         files_struct *fsp,
 146                         enum file_close_type close_type);
 147 bool locking_init(void);
 148 bool locking_init_readonly(void);
 149 bool locking_end(void);
 150 char *share_mode_str(TALLOC_CTX *ctx, int num, const struct share_mode_entry *e);
 151 struct share_mode_lock *get_existing_share_mode_lock(TALLOC_CTX *mem_ctx,
 152                                                      const struct file_id id);
 153 struct share_mode_lock *get_share_mode_lock(
 154         TALLOC_CTX *mem_ctx,
 155         const struct file_id id,
 156         const char *servicepath,
 157         const struct smb_filename *smb_fname,
 158         const struct timespec *old_write_time);
 159 struct share_mode_lock *fetch_share_mode_unlocked(TALLOC_CTX *mem_ctx,
 160                                                   const struct file_id id);
 161 bool rename_share_filename(struct messaging_context *msg_ctx,
 162                         struct share_mode_lock *lck,
 163                         const char *servicepath,
 164                         uint32_t orig_name_hash,
 165                         uint32_t new_name_hash,
 166                         const struct smb_filename *smb_fname);
 167 void get_file_infos(struct file_id id,
 168                     uint32_t name_hash,
 169                     bool *delete_on_close,
 170                     struct timespec *write_time);
 171 bool is_valid_share_mode_entry(const struct share_mode_entry *e);
 172 bool is_deferred_open_entry(const struct share_mode_entry *e);
 173 bool share_mode_stale_pid(struct share_mode_data *d, unsigned i);
 174 void set_share_mode(struct share_mode_lock *lck, files_struct *fsp,
 175                     uid_t uid, uint64_t mid, uint16 op_type);
 176 void add_deferred_open(struct share_mode_lock *lck, uint64_t mid,
 177                        struct timeval request_time,
 178                        struct server_id pid, struct file_id id);
 179 bool del_share_mode(struct share_mode_lock *lck, files_struct *fsp);
 180 bool mark_share_mode_disconnected(struct share_mode_lock *lck,
 181                                   struct files_struct *fsp);
 182 void del_deferred_open_entry(struct share_mode_lock *lck, uint64_t mid,
 183                              struct server_id pid);
 184 bool remove_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
 185 bool downgrade_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
 186 bool get_delete_on_close_token(struct share_mode_lock *lck,
 187                                 uint32_t name_hash,
 188                                 const struct security_token **pp_nt_tok,
 189                                 const struct security_unix_token **pp_tok);
 190 void set_delete_on_close_lck(files_struct *fsp,
 191                         struct share_mode_lock *lck,
 192                         bool delete_on_close,
 193                         const struct security_token *nt_tok,
 194                         const struct security_unix_token *tok);
 195 bool set_delete_on_close(files_struct *fsp, bool delete_on_close,
 196                         const struct security_token *nt_tok,
 197                         const struct security_unix_token *tok);
 198 bool is_delete_on_close_set(struct share_mode_lock *lck, uint32_t name_hash);
 199 bool set_sticky_write_time(struct file_id fileid, struct timespec write_time);
 200 bool set_write_time(struct file_id fileid, struct timespec write_time);
 201 int share_mode_forall(void (*fn)(const struct share_mode_entry *, const char *,
 202                                  const char *, void *),
 203                       void *private_data);
 204
 205 /* The following definitions come from locking/posix.c  */
 206
 207 bool is_posix_locked(files_struct *fsp,
 208                         uint64_t *pu_offset,
 209                         uint64_t *pu_count,
 210                         enum brl_type *plock_type,
 211                         enum brl_flavour lock_flav);
 212 bool posix_locking_init(bool read_only);
 213 bool posix_locking_end(void);
 214 int fd_close_posix(struct files_struct *fsp);
 215 bool set_posix_lock_windows_flavour(files_struct *fsp,
 216                         uint64_t u_offset,
 217                         uint64_t u_count,
 218                         enum brl_type lock_type,
 219                         const struct lock_context *lock_ctx,
 220                         const struct lock_struct *plocks,
 221                         int num_locks,
 222                         int *errno_ret);
 223 bool release_posix_lock_windows_flavour(files_struct *fsp,
 224                                 uint64_t u_offset,
 225                                 uint64_t u_count,
 226                                 enum brl_type deleted_lock_type,
 227                                 const struct lock_context *lock_ctx,
 228                                 const struct lock_struct *plocks,
 229                                 int num_locks);
 230 bool set_posix_lock_posix_flavour(files_struct *fsp,
 231                         uint64_t u_offset,
 232                         uint64_t u_count,
 233                         enum brl_type lock_type,
 234                         int *errno_ret);
 235 bool release_posix_lock_posix_flavour(files_struct *fsp,
 236                                 uint64_t u_offset,
 237                                 uint64_t u_count,
 238                                 const struct lock_context *lock_ctx,
 239                                 const struct lock_struct *plocks,
 240                                 int num_locks);
 241
 242 #endif /* _LOCKING_PROTO_H_ */