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 void brl_close_fnum(struct messaging_context *msg_ctx,
  83                     struct byte_range_lock *br_lck);
  84 int brl_forall(void (*fn)(struct file_id id, struct server_id pid,
  85                           enum brl_type lock_type,
  86                           enum brl_flavour lock_flav,
  87                           br_off start, br_off size,
  88                           void *private_data),
  89                void *private_data);
  90 struct byte_range_lock *brl_get_locks(TALLOC_CTX *mem_ctx,
  91                                         files_struct *fsp);
  92 struct byte_range_lock *brl_get_locks_readonly(files_struct *fsp);
  93 void brl_revalidate(struct messaging_context *msg_ctx,
  94                     void *private_data,
  95                     uint32_t msg_type,
  96                     struct server_id server_id,
  97                     DATA_BLOB *data);
  98
  99 /* The following definitions come from locking/locking.c  */
 100
 101 const char *lock_type_name(enum brl_type lock_type);
 102 const char *lock_flav_name(enum brl_flavour lock_flav);
 103 void init_strict_lock_struct(files_struct *fsp,
 104                                 uint64_t smblctx,
 105                                 br_off start,
 106                                 br_off size,
 107                                 enum brl_type lock_type,
 108                                 struct lock_struct *plock);
 109 bool strict_lock_default(files_struct *fsp,
 110                                 struct lock_struct *plock);
 111 void strict_unlock_default(files_struct *fsp,
 112                                 struct lock_struct *plock);
 113 NTSTATUS query_lock(files_struct *fsp,
 114                         uint64_t *psmblctx,
 115                         uint64_t *pcount,
 116                         uint64_t *poffset,
 117                         enum brl_type *plock_type,
 118                         enum brl_flavour lock_flav);
 119 struct byte_range_lock *do_lock(struct messaging_context *msg_ctx,
 120                         files_struct *fsp,
 121                         uint64_t smblctx,
 122                         uint64_t count,
 123                         uint64_t offset,
 124                         enum brl_type lock_type,
 125                         enum brl_flavour lock_flav,
 126                         bool blocking_lock,
 127                         NTSTATUS *perr,
 128                         uint64_t *psmblctx,
 129                         struct blocking_lock_record *blr);
 130 NTSTATUS do_unlock(struct messaging_context *msg_ctx,
 131                         files_struct *fsp,
 132                         uint64_t smblctx,
 133                         uint64_t count,
 134                         uint64_t offset,
 135                         enum brl_flavour lock_flav);
 136 NTSTATUS do_lock_cancel(files_struct *fsp,
 137                         uint64 smblctx,
 138                         uint64_t count,
 139                         uint64_t offset,
 140                         enum brl_flavour lock_flav,
 141                         struct blocking_lock_record *blr);
 142 void locking_close_file(struct messaging_context *msg_ctx,
 143                         files_struct *fsp,
 144                         enum file_close_type close_type);
 145 bool locking_init(void);
 146 bool locking_init_readonly(void);
 147 bool locking_end(void);
 148 char *share_mode_str(TALLOC_CTX *ctx, int num, const struct share_mode_entry *e);
 149 struct share_mode_lock *get_existing_share_mode_lock(TALLOC_CTX *mem_ctx,
 150                                                      const struct file_id id);
 151 struct share_mode_lock *get_share_mode_lock(
 152         TALLOC_CTX *mem_ctx,
 153         const struct file_id id,
 154         const char *servicepath,
 155         const struct smb_filename *smb_fname,
 156         const struct timespec *old_write_time);
 157 struct share_mode_lock *fetch_share_mode_unlocked(TALLOC_CTX *mem_ctx,
 158                                                   const struct file_id id);
 159 bool rename_share_filename(struct messaging_context *msg_ctx,
 160                         struct share_mode_lock *lck,
 161                         const char *servicepath,
 162                         uint32_t orig_name_hash,
 163                         uint32_t new_name_hash,
 164                         const struct smb_filename *smb_fname);
 165 void get_file_infos(struct file_id id,
 166                     uint32_t name_hash,
 167                     bool *delete_on_close,
 168                     struct timespec *write_time);
 169 bool is_valid_share_mode_entry(const struct share_mode_entry *e);
 170 bool is_deferred_open_entry(const struct share_mode_entry *e);
 171 void set_share_mode(struct share_mode_lock *lck, files_struct *fsp,
 172                     uid_t uid, uint64_t mid, uint16 op_type);
 173 void add_deferred_open(struct share_mode_lock *lck, uint64_t mid,
 174                        struct timeval request_time,
 175                        struct server_id pid, struct file_id id);
 176 bool del_share_mode(struct share_mode_lock *lck, files_struct *fsp);
 177 void del_deferred_open_entry(struct share_mode_lock *lck, uint64_t mid,
 178                              struct server_id pid);
 179 bool remove_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
 180 bool downgrade_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
 181 bool get_delete_on_close_token(struct share_mode_lock *lck,
 182                                 uint32_t name_hash,
 183                                 const struct security_token **pp_nt_tok,
 184                                 const struct security_unix_token **pp_tok);
 185 void set_delete_on_close_lck(files_struct *fsp,
 186                         struct share_mode_lock *lck,
 187                         bool delete_on_close,
 188                         const struct security_token *nt_tok,
 189                         const struct security_unix_token *tok);
 190 bool set_delete_on_close(files_struct *fsp, bool delete_on_close,
 191                         const struct security_token *nt_tok,
 192                         const struct security_unix_token *tok);
 193 bool is_delete_on_close_set(struct share_mode_lock *lck, uint32_t name_hash);
 194 bool set_sticky_write_time(struct file_id fileid, struct timespec write_time);
 195 bool set_write_time(struct file_id fileid, struct timespec write_time);
 196 int share_mode_forall(void (*fn)(const struct share_mode_entry *, const char *,
 197                                  const char *, void *),
 198                       void *private_data);
 199
 200 /* The following definitions come from locking/posix.c  */
 201
 202 bool is_posix_locked(files_struct *fsp,
 203                         uint64_t *pu_offset,
 204                         uint64_t *pu_count,
 205                         enum brl_type *plock_type,
 206                         enum brl_flavour lock_flav);
 207 bool posix_locking_init(bool read_only);
 208 bool posix_locking_end(void);
 209 void reduce_windows_lock_ref_count(files_struct *fsp, unsigned int dcount);
 210 int fd_close_posix(struct files_struct *fsp);
 211 bool set_posix_lock_windows_flavour(files_struct *fsp,
 212                         uint64_t u_offset,
 213                         uint64_t u_count,
 214                         enum brl_type lock_type,
 215                         const struct lock_context *lock_ctx,
 216                         const struct lock_struct *plocks,
 217                         int num_locks,
 218                         int *errno_ret);
 219 bool release_posix_lock_windows_flavour(files_struct *fsp,
 220                                 uint64_t u_offset,
 221                                 uint64_t u_count,
 222                                 enum brl_type deleted_lock_type,
 223                                 const struct lock_context *lock_ctx,
 224                                 const struct lock_struct *plocks,
 225                                 int num_locks);
 226 bool set_posix_lock_posix_flavour(files_struct *fsp,
 227                         uint64_t u_offset,
 228                         uint64_t u_count,
 229                         enum brl_type lock_type,
 230                         int *errno_ret);
 231 bool release_posix_lock_posix_flavour(files_struct *fsp,
 232                                 uint64_t u_offset,
 233                                 uint64_t u_count,
 234                                 const struct lock_context *lock_ctx,
 235                                 const struct lock_struct *plocks,
 236                                 int num_locks);
 237
 238 #endif /* _LOCKING_PROTO_H_ */