s3: Remove unused count_all_current_connections()
[ira/wip.git] / source3 / smbd / connection.c
1 /* 
2    Unix SMB/CIFS implementation.
3    connection claim routines
4    Copyright (C) Andrew Tridgell 1998
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 /****************************************************************************
23  Delete a connection record.
24 ****************************************************************************/
25
26 bool yield_connection(connection_struct *conn, const char *name)
27 {
28         struct db_record *rec;
29         NTSTATUS status;
30
31         DEBUG(3,("Yielding connection to %s\n",name));
32
33         if (!(rec = connections_fetch_entry(NULL, conn, name))) {
34                 DEBUG(0, ("connections_fetch_entry failed\n"));
35                 return False;
36         }
37
38         status = rec->delete_rec(rec);
39         if (!NT_STATUS_IS_OK(status)) {
40                 DEBUG( NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND) ? 3 : 0,
41                        ("deleting connection record returned %s\n",
42                         nt_errstr(status)));
43         }
44
45         TALLOC_FREE(rec);
46         return NT_STATUS_IS_OK(status);
47 }
48
49 struct count_stat {
50         pid_t mypid;
51         int curr_connections;
52         const char *name;
53         bool Clear;
54 };
55
56 /****************************************************************************
57  Count the entries belonging to a service in the connection db.
58 ****************************************************************************/
59
60 static int count_fn(struct db_record *rec,
61                     const struct connections_key *ckey,
62                     const struct connections_data *crec,
63                     void *udp)
64 {
65         struct count_stat *cs = (struct count_stat *)udp;
66
67         if (crec->cnum == -1) {
68                 return 0;
69         }
70
71         /* If the pid was not found delete the entry from connections.tdb */
72
73         if (cs->Clear && !process_exists(crec->pid) && (errno == ESRCH)) {
74                 NTSTATUS status;
75                 DEBUG(2,("pid %s doesn't exist - deleting connections %d [%s]\n",
76                          procid_str_static(&crec->pid), crec->cnum,
77                          crec->servicename));
78
79                 status = rec->delete_rec(rec);
80                 if (!NT_STATUS_IS_OK(status)) {
81                         DEBUG(0,("count_fn: tdb_delete failed with error %s\n",
82                                  nt_errstr(status)));
83                 }
84                 return 0;
85         }
86
87         if (strequal(crec->servicename, cs->name))
88                 cs->curr_connections++;
89
90         return 0;
91 }
92
93 /****************************************************************************
94  Claim an entry in the connections database.
95 ****************************************************************************/
96
97 int count_current_connections( const char *sharename, bool clear  )
98 {
99         struct count_stat cs;
100
101         cs.mypid = sys_getpid();
102         cs.curr_connections = 0;
103         cs.name = sharename;
104         cs.Clear = clear;
105
106         /*
107          * This has a race condition, but locking the chain before hand is worse
108          * as it leads to deadlock.
109          */
110
111         if (connections_forall(count_fn, &cs) == -1) {
112                 DEBUG(0,("count_current_connections: traverse of "
113                          "connections.tdb failed\n"));
114                 return False;
115         }
116
117         return cs.curr_connections;
118 }
119
120 /****************************************************************************
121  Claim an entry in the connections database.
122 ****************************************************************************/
123
124 bool claim_connection(connection_struct *conn, const char *name,
125                       uint32 msg_flags)
126 {
127         struct db_record *rec;
128         struct connections_data crec;
129         TDB_DATA dbuf;
130         NTSTATUS status;
131         char addr[INET6_ADDRSTRLEN];
132
133         DEBUG(5,("claiming [%s]\n", name));
134
135         if (!(rec = connections_fetch_entry(talloc_tos(), conn, name))) {
136                 DEBUG(0, ("connections_fetch_entry failed\n"));
137                 return False;
138         }
139
140         /* fill in the crec */
141         ZERO_STRUCT(crec);
142         crec.magic = 0x280267;
143         crec.pid = procid_self();
144         crec.cnum = conn?conn->cnum:-1;
145         if (conn) {
146                 crec.uid = conn->server_info->utok.uid;
147                 crec.gid = conn->server_info->utok.gid;
148                 strlcpy(crec.servicename, lp_servicename(SNUM(conn)),
149                         sizeof(crec.servicename));
150         }
151         crec.start = time(NULL);
152         crec.bcast_msg_flags = msg_flags;
153
154         strlcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine));
155         strlcpy(crec.addr,conn?conn->client_address:
156                         client_addr(get_client_fd(),addr,sizeof(addr)),
157                 sizeof(crec.addr));
158
159         dbuf.dptr = (uint8 *)&crec;
160         dbuf.dsize = sizeof(crec);
161
162         status = rec->store(rec, dbuf, TDB_REPLACE);
163
164         TALLOC_FREE(rec);
165
166         if (!NT_STATUS_IS_OK(status)) {
167                 DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
168                          nt_errstr(status)));
169                 return False;
170         }
171
172         return True;
173 }
174
175 bool register_message_flags(bool doreg, uint32 msg_flags)
176 {
177         struct db_record *rec;
178         struct connections_data *pcrec;
179         NTSTATUS status;
180
181         DEBUG(10,("register_message_flags: %s flags 0x%x\n",
182                 doreg ? "adding" : "removing",
183                 (unsigned int)msg_flags ));
184
185         if (!(rec = connections_fetch_entry(NULL, NULL, ""))) {
186                 DEBUG(0, ("connections_fetch_entry failed\n"));
187                 return False;
188         }
189
190         if (rec->value.dsize != sizeof(struct connections_data)) {
191                 DEBUG(0,("register_message_flags: Got wrong record size\n"));
192                 TALLOC_FREE(rec);
193                 return False;
194         }
195
196         pcrec = (struct connections_data *)rec->value.dptr;
197         if (doreg)
198                 pcrec->bcast_msg_flags |= msg_flags;
199         else
200                 pcrec->bcast_msg_flags &= ~msg_flags;
201
202         status = rec->store(rec, rec->value, TDB_REPLACE);
203
204         if (!NT_STATUS_IS_OK(status)) {
205                 DEBUG(0,("register_message_flags: tdb_store failed: %s.\n",
206                          nt_errstr(status)));
207                 TALLOC_FREE(rec);
208                 return False;
209         }
210
211         DEBUG(10,("register_message_flags: new flags 0x%x\n",
212                 (unsigned int)pcrec->bcast_msg_flags ));
213
214         TALLOC_FREE(rec);
215
216         return True;
217 }