2 Unix SMB/CIFS implementation.
3 SMB parameters and setup, plus a whole lot more.
5 Copyright (C) Jeremy Allison 2006
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 /* passed to br lock code - the UNLOCK_LOCK should never be stored into the tdb
25 and is used in calculating POSIX unlock ranges only. We differentiate between
26 PENDING read and write locks to allow posix lock downgrades to trigger a lock
29 enum brl_type
{READ_LOCK
, WRITE_LOCK
, PENDING_READ_LOCK
, PENDING_WRITE_LOCK
, UNLOCK_LOCK
};
30 enum brl_flavour
{WINDOWS_LOCK
= 0, POSIX_LOCK
= 1};
32 #define IS_PENDING_LOCK(type) ((type) == PENDING_READ_LOCK || (type) == PENDING_WRITE_LOCK)
34 /* This contains elements that differentiate locks. The smbpid is a
35 client supplied pid, and is essentially the locking context for
47 /* we don't use SMB_DEV_T and SMB_INO_T as we want a fixed size here,
48 and we may be using file system specific code to fill in something
49 other than a dev_t for the device */
52 uint64_t extid
; /* Support systems that use an extended id (e.g. snapshots). */
55 struct byte_range_lock
{
56 struct files_struct
*fsp
;
57 unsigned int num_locks
;
61 struct lock_struct
*lock_data
;
62 struct db_record
*record
;
65 /* Internal structure in brlock.tdb.
66 The data in brlock records is an unsorted linear array of these
67 records. It is unnecessary to store the count as tdb provides the
71 struct lock_context context
;
75 enum brl_type lock_type
;
76 enum brl_flavour lock_flav
;
79 /****************************************************************************
80 This is the structure to queue to implement blocking locks.
81 *****************************************************************************/
83 struct blocking_lock_record
{
84 struct blocking_lock_record
*next
;
85 struct blocking_lock_record
*prev
;
86 struct files_struct
*fsp
;
87 struct timeval expire_time
;
92 uint32_t blocking_pid
; /* PID that blocks us. */
93 enum brl_flavour lock_flav
;
94 enum brl_type lock_type
;
95 struct smb_request
*req
;
96 void *blr_private
; /* Implementation specific. */
99 struct smbd_lock_element
{
101 enum brl_type brltype
;
106 #endif /* _LOCKING_H_ */