1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
Unix SMB/CIFS implementation.
Database interface wrapper
Copyright (C) Volker Lendecke 2005-2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "dbwrap/dbwrap.h"
#include "dbwrap/dbwrap_private.h"
#include "dbwrap/dbwrap_open.h"
#include "dbwrap/dbwrap_tdb.h"
#include "dbwrap/dbwrap_ctdb.h"
#include "util_tdb.h"
#ifdef CLUSTER_SUPPORT
#include "ctdb_private.h"
#endif
bool db_is_local(const char *name)
{
#ifdef CLUSTER_SUPPORT
const char *sockname = lp_ctdbd_socket();
if(!sockname || !*sockname) {
sockname = CTDB_PATH;
}
if (lp_clustering() && socket_exist(sockname)) {
const char *partname;
/* ctdb only wants the file part of the name */
partname = strrchr(name, '/');
if (partname) {
partname++;
} else {
partname = name;
}
/* allow ctdb for individual databases to be disabled */
if (lp_parm_bool(-1, "ctdb", partname, True)) {
return false;
}
}
#endif
return true;
}
/**
* open a database
*/
struct db_context *db_open(TALLOC_CTX *mem_ctx,
const char *name,
int hash_size, int tdb_flags,
int open_flags, mode_t mode,
enum dbwrap_lock_order lock_order)
{
struct db_context *result = NULL;
#ifdef CLUSTER_SUPPORT
const char *sockname;
#endif
if ((lock_order != DBWRAP_LOCK_ORDER_1) &&
(lock_order != DBWRAP_LOCK_ORDER_2)) {
/*
* Only allow 2 levels. ctdb gives us 3, and we will
* have the watchers database soon.
*/
errno = EINVAL;
return NULL;
}
#ifdef CLUSTER_SUPPORT
sockname = lp_ctdbd_socket();
if(!sockname || !*sockname) {
sockname = CTDB_PATH;
}
if (lp_clustering()) {
const char *partname;
if (!socket_exist(sockname)) {
DEBUG(1, ("ctdb socket does not exist - is ctdb not "
"running?\n"));
return NULL;
}
/* ctdb only wants the file part of the name */
partname = strrchr(name, '/');
if (partname) {
partname++;
} else {
partname = name;
}
/* allow ctdb for individual databases to be disabled */
if (lp_parm_bool(-1, "ctdb", partname, True)) {
result = db_open_ctdb(mem_ctx, partname, hash_size,
tdb_flags, open_flags, mode);
if (result == NULL) {
DEBUG(0,("failed to attach to ctdb %s\n",
partname));
if (errno == 0) {
errno = EIO;
}
return NULL;
}
}
}
#endif
if (result == NULL) {
result = db_open_tdb(mem_ctx, name, hash_size,
tdb_flags, open_flags, mode);
}
if (result != NULL) {
result->lock_order = lock_order;
}
return result;
}
|
