source3/locking/share_mode_lock.h

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 3 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14  */
  15
  16 #ifndef __LOCKING_SHARE_MODE_LOCK_H__
  17 #define __LOCKING_SHARE_MODE_LOCK_H__
  18
  19 #include "replace.h"
  20 #include <tevent.h>
  21 #include "librpc/gen_ndr/file_id.h"
  22 #include "lib/util/time.h"
  23
  24 struct share_mode_data;
  25 struct share_mode_lock;
  26 struct share_mode_entry;
  27 struct smb_filename;
  28 struct files_struct;
  29 struct smb2_lease_key;
  30
  31 bool locking_init(void);
  32 bool locking_init_readonly(void);
  33 bool locking_end(void);
  34
  35 struct file_id share_mode_lock_file_id(const struct share_mode_lock *lck);
  36
  37 struct share_mode_lock *get_existing_share_mode_lock(TALLOC_CTX *mem_ctx,
  38                                                      struct file_id id);
  39
  40 bool del_share_mode(struct share_mode_lock *lck,
  41                     struct files_struct *fsp);
  42 bool downgrade_share_oplock(struct share_mode_lock *lck,
  43                             struct files_struct *fsp);
  44 bool remove_share_oplock(struct share_mode_lock *lck,
  45                          struct files_struct *fsp);
  46 bool file_has_read_lease(struct files_struct *fsp);
  47
  48 bool set_share_mode(
  49         struct share_mode_lock *lck,
  50         struct files_struct *fsp,
  51         uid_t uid,
  52         uint64_t mid,
  53         uint16_t op_type,
  54         const struct smb2_lease_key *lease_key,
  55         uint32_t share_access,
  56         uint32_t access_mask);
  57 bool reset_share_mode_entry(
  58         struct share_mode_lock *lck,
  59         struct server_id old_pid,
  60         uint64_t old_share_file_id,
  61         struct server_id new_pid,
  62         uint64_t new_mid,
  63         uint64_t new_share_file_id);
  64
  65 bool mark_share_mode_disconnected(
  66         struct share_mode_lock *lck, struct files_struct *fsp);
  67
  68 struct share_mode_lock *fetch_share_mode_unlocked(
  69         TALLOC_CTX *mem_ctx,
  70         struct file_id id);
  71
  72 struct tevent_req *fetch_share_mode_send(
  73         TALLOC_CTX *mem_ctx,
  74         struct tevent_context *ev,
  75         struct file_id id,
  76         bool *queued);
  77 NTSTATUS fetch_share_mode_recv(
  78         struct tevent_req *req,
  79         TALLOC_CTX *mem_ctx,
  80         struct share_mode_lock **_lck);
  81
  82 int share_entry_forall(
  83         int (*fn)(struct file_id fid,
  84                   const struct share_mode_data *data,
  85                   const struct share_mode_entry *entry,
  86                   void *private_data),
  87         void *private_data);
  88
  89 NTSTATUS share_mode_count_entries(struct file_id fid, size_t *num_share_modes);
  90 int share_mode_forall(
  91         int (*fn)(struct file_id fid,
  92                   const struct share_mode_data *data,
  93                   void *private_data),
  94         void *private_data);
  95 bool share_mode_forall_entries(
  96         struct share_mode_lock *lck,
  97         bool (*fn)(struct share_mode_entry *e,
  98                    bool *modified,
  99                    void *private_data),
 100         void *private_data);
 101
 102 NTTIME share_mode_changed_write_time(struct share_mode_lock *lck);
 103 void share_mode_set_changed_write_time(struct share_mode_lock *lck, struct timespec write_time);
 104 void share_mode_set_old_write_time(struct share_mode_lock *lck, struct timespec write_time);
 105 const char *share_mode_servicepath(struct share_mode_lock *lck);
 106 char *share_mode_filename(TALLOC_CTX *mem_ctx, struct share_mode_lock *lck);
 107 char *share_mode_data_dump(
 108         TALLOC_CTX *mem_ctx, struct share_mode_lock *lck);
 109
 110 void share_mode_flags_get(
 111         struct share_mode_lock *lck,
 112         uint32_t *access_mask,
 113         uint32_t *share_mode,
 114         uint32_t *lease_type);
 115 void share_mode_flags_set(
 116         struct share_mode_lock *lck,
 117         uint32_t access_mask,
 118         uint32_t share_mode,
 119         uint32_t lease_type,
 120         bool *modified);
 121
 122 struct tevent_req *share_mode_watch_send(
 123         TALLOC_CTX *mem_ctx,
 124         struct tevent_context *ev,
 125         struct share_mode_lock *lck,
 126         struct server_id blocker);
 127 NTSTATUS share_mode_watch_recv(
 128         struct tevent_req *req, bool *blockerdead, struct server_id *blocker);
 129 NTSTATUS share_mode_wakeup_waiters(struct file_id id);
 130
 131 typedef void (*share_mode_do_locked_vfs_fn_t)(
 132                 struct share_mode_lock *lck,
 133                 void *private_data);
 134 NTSTATUS _share_mode_do_locked_vfs_denied(
 135         struct file_id id,
 136         share_mode_do_locked_vfs_fn_t fn,
 137         void *private_data,
 138         const char *location);
 139 #define share_mode_do_locked_vfs_denied(__id, __fn, __private_data) \
 140         _share_mode_do_locked_vfs_denied(__id, __fn, __private_data, __location__)
 141 NTSTATUS _share_mode_do_locked_vfs_allowed(
 142         struct file_id id,
 143         share_mode_do_locked_vfs_fn_t fn,
 144         void *private_data,
 145         const char *location);
 146 #define share_mode_do_locked_vfs_allowed(__id, __fn, __private_data) \
 147         _share_mode_do_locked_vfs_allowed(__id, __fn, __private_data, __location__)
 148
 149 struct share_mode_entry_prepare_state {
 150         struct file_id __fid;
 151         struct share_mode_lock *__lck_ptr;
 152         union {
 153 #define __SHARE_MODE_LOCK_SPACE 32
 154                 uint8_t __u8_space[__SHARE_MODE_LOCK_SPACE];
 155 #ifdef SHARE_MODE_ENTRY_PREPARE_STATE_LCK_SPACE
 156                 struct share_mode_lock __lck_space;
 157 #endif
 158         };
 159 };
 160
 161 typedef void (*share_mode_entry_prepare_lock_fn_t)(
 162                 struct share_mode_lock *lck,
 163                 bool *keep_locked,
 164                 void *private_data);
 165 NTSTATUS _share_mode_entry_prepare_lock(
 166         struct share_mode_entry_prepare_state *prepare_state,
 167         struct file_id id,
 168         const char *servicepath,
 169         const struct smb_filename *smb_fname,
 170         const struct timespec *old_write_time,
 171         share_mode_entry_prepare_lock_fn_t fn,
 172         void *private_data,
 173         const char *location);
 174 #define share_mode_entry_prepare_lock_add(__prepare_state, __id, \
 175                 __servicepath, __smb_fname, __old_write_time, \
 176                 __fn, __private_data) \
 177         _share_mode_entry_prepare_lock(__prepare_state, __id, \
 178                 __servicepath, __smb_fname, __old_write_time, \
 179                 __fn, __private_data, __location__);
 180 #define share_mode_entry_prepare_lock_del(__prepare_state, __id, \
 181                 __fn, __private_data) \
 182         _share_mode_entry_prepare_lock(__prepare_state, __id, \
 183                 NULL, NULL, NULL, \
 184                 __fn, __private_data, __location__);
 185
 186 typedef void (*share_mode_entry_prepare_unlock_fn_t)(
 187                 struct share_mode_lock *lck,
 188                 void *private_data);
 189 NTSTATUS _share_mode_entry_prepare_unlock(
 190         struct share_mode_entry_prepare_state *prepare_state,
 191         share_mode_entry_prepare_unlock_fn_t fn,
 192         void *private_data,
 193         const char *location);
 194 #define share_mode_entry_prepare_unlock(__prepare_state, \
 195                 __fn, __private_data) \
 196         _share_mode_entry_prepare_unlock(__prepare_state, \
 197                 __fn, __private_data, __location__);
 198
 199 #endif