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DEFINITIONS
This source file includes following definitions.
- connections_db_ctx
- connections_fetch_record
- connections_fetch_entry
- conn_traverse_fn
- connections_traverse
- connections_forall
- connections_init
1 /*
2 Unix SMB/CIFS implementation.
3 Low-level connections.tdb access functions
4 Copyright (C) Volker Lendecke 2007
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "includes.h"
21
22 static struct db_context *connections_db_ctx(bool rw)
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23 {
24 static struct db_context *db_ctx;
25
26 if (db_ctx != NULL) {
27 return db_ctx;
28 }
29
30 if (rw) {
31 db_ctx = db_open(NULL, lock_path("connections.tdb"), 0,
32 TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
33 O_RDWR | O_CREAT, 0644);
34 }
35 else {
36 db_ctx = db_open(NULL, lock_path("connections.tdb"), 0,
37 TDB_CLEAR_IF_FIRST|TDB_DEFAULT, O_RDONLY, 0);
38 }
39
40 return db_ctx;
41 }
42
43 struct db_record *connections_fetch_record(TALLOC_CTX *mem_ctx,
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44 TDB_DATA key)
45 {
46 struct db_context *ctx = connections_db_ctx(True);
47
48 if (ctx == NULL) {
49 return NULL;
50 }
51
52 return ctx->fetch_locked(ctx, mem_ctx, key);
53 }
54
55 struct db_record *connections_fetch_entry(TALLOC_CTX *mem_ctx,
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56 connection_struct *conn,
57 const char *name)
58 {
59 struct connections_key ckey;
60 TDB_DATA key;
61
62 ZERO_STRUCT(ckey);
63 ckey.pid = procid_self();
64 ckey.cnum = conn ? conn->cnum : -1;
65 strlcpy(ckey.name, name, sizeof(ckey.name));
66
67 key.dsize = sizeof(ckey);
68 key.dptr = (uint8 *)&ckey;
69
70 return connections_fetch_record(mem_ctx, key);
71 }
72
73 struct conn_traverse_state {
74 int (*fn)(struct db_record *rec,
75 const struct connections_key *key,
76 const struct connections_data *data,
77 void *private_data);
78 void *private_data;
79 };
80
81 static int conn_traverse_fn(struct db_record *rec, void *private_data)
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82 {
83 struct conn_traverse_state *state =
84 (struct conn_traverse_state *)private_data;
85
86 if ((rec->key.dsize != sizeof(struct connections_key))
87 || (rec->value.dsize != sizeof(struct connections_data))) {
88 return 0;
89 }
90
91 return state->fn(rec, (const struct connections_key *)rec->key.dptr,
92 (const struct connections_data *)rec->value.dptr,
93 state->private_data);
94 }
95
96 int connections_traverse(int (*fn)(struct db_record *rec,
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97 void *private_data),
98 void *private_data)
99 {
100 struct db_context *ctx = connections_db_ctx(False);
101
102 if (ctx == NULL) {
103 return -1;
104 }
105
106 return ctx->traverse(ctx, fn, private_data);
107 }
108
109 int connections_forall(int (*fn)(struct db_record *rec,
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110 const struct connections_key *key,
111 const struct connections_data *data,
112 void *private_data),
113 void *private_data)
114 {
115 struct conn_traverse_state state;
116
117 state.fn = fn;
118 state.private_data = private_data;
119
120 return connections_traverse(conn_traverse_fn, (void *)&state);
121 }
122
123 bool connections_init(bool rw)
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124 {
125 return (connections_db_ctx(rw) != NULL);
126 }