Fix the build of nfs4_acls.c
[Samba.git] / source3 / smbd / connection.c
blob3b72a9505a13d33c5c0f4a969ce30bcf1483edc7
1 /*
2 Unix SMB/CIFS implementation.
3 connection claim routines
4 Copyright (C) Andrew Tridgell 1998
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.
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.
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/>.
20 #include "includes.h"
22 /****************************************************************************
23 Delete a connection record.
24 ****************************************************************************/
26 bool yield_connection(connection_struct *conn, const char *name)
28 struct db_record *rec;
29 NTSTATUS status;
31 DEBUG(3,("Yielding connection to %s\n",name));
33 if (!(rec = connections_fetch_entry(NULL, conn, name))) {
34 DEBUG(0, ("connections_fetch_entry failed\n"));
35 return False;
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)));
45 TALLOC_FREE(rec);
46 return NT_STATUS_IS_OK(status);
49 struct count_stat {
50 pid_t mypid;
51 int curr_connections;
52 const char *name;
53 bool Clear;
56 /****************************************************************************
57 Count the entries belonging to a service in the connection db.
58 ****************************************************************************/
60 static int count_fn(struct db_record *rec,
61 const struct connections_key *ckey,
62 const struct connections_data *crec,
63 void *udp)
65 struct count_stat *cs = (struct count_stat *)udp;
67 if (crec->cnum == -1) {
68 return 0;
71 /* If the pid was not found delete the entry from connections.tdb */
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));
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)));
84 return 0;
87 if (strequal(crec->servicename, cs->name))
88 cs->curr_connections++;
90 return 0;
93 /****************************************************************************
94 Claim an entry in the connections database.
95 ****************************************************************************/
97 int count_current_connections( const char *sharename, bool clear )
99 struct count_stat cs;
101 cs.mypid = sys_getpid();
102 cs.curr_connections = 0;
103 cs.name = sharename;
104 cs.Clear = clear;
107 * This has a race condition, but locking the chain before hand is worse
108 * as it leads to deadlock.
111 if (connections_forall(count_fn, &cs) == -1) {
112 DEBUG(0,("count_current_connections: traverse of "
113 "connections.tdb failed\n"));
114 return False;
117 return cs.curr_connections;
120 /****************************************************************************
121 Count the number of connections open across all shares.
122 ****************************************************************************/
124 int count_all_current_connections(void)
126 return count_current_connections(NULL, True /* clear stale entries */);
129 /****************************************************************************
130 Claim an entry in the connections database.
131 ****************************************************************************/
133 bool claim_connection(connection_struct *conn, const char *name,
134 uint32 msg_flags)
136 struct db_record *rec;
137 struct connections_data crec;
138 TDB_DATA dbuf;
139 NTSTATUS status;
140 char addr[INET6_ADDRSTRLEN];
142 DEBUG(5,("claiming [%s]\n", name));
144 if (!(rec = connections_fetch_entry(talloc_tos(), conn, name))) {
145 DEBUG(0, ("connections_fetch_entry failed\n"));
146 return False;
149 /* fill in the crec */
150 ZERO_STRUCT(crec);
151 crec.magic = 0x280267;
152 crec.pid = procid_self();
153 crec.cnum = conn?conn->cnum:-1;
154 if (conn) {
155 crec.uid = conn->server_info->utok.uid;
156 crec.gid = conn->server_info->utok.gid;
157 strlcpy(crec.servicename, lp_servicename(SNUM(conn)),
158 sizeof(crec.servicename));
160 crec.start = time(NULL);
161 crec.bcast_msg_flags = msg_flags;
163 strlcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine));
164 strlcpy(crec.addr,conn?conn->client_address:
165 client_addr(get_client_fd(),addr,sizeof(addr)),
166 sizeof(crec.addr));
168 dbuf.dptr = (uint8 *)&crec;
169 dbuf.dsize = sizeof(crec);
171 status = rec->store(rec, dbuf, TDB_REPLACE);
173 TALLOC_FREE(rec);
175 if (!NT_STATUS_IS_OK(status)) {
176 DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
177 nt_errstr(status)));
178 return False;
181 return True;
184 bool register_message_flags(bool doreg, uint32 msg_flags)
186 struct db_record *rec;
187 struct connections_data *pcrec;
188 NTSTATUS status;
190 DEBUG(10,("register_message_flags: %s flags 0x%x\n",
191 doreg ? "adding" : "removing",
192 (unsigned int)msg_flags ));
194 if (!(rec = connections_fetch_entry(NULL, NULL, ""))) {
195 DEBUG(0, ("connections_fetch_entry failed\n"));
196 return False;
199 if (rec->value.dsize != sizeof(struct connections_data)) {
200 DEBUG(0,("register_message_flags: Got wrong record size\n"));
201 TALLOC_FREE(rec);
202 return False;
205 pcrec = (struct connections_data *)rec->value.dptr;
206 if (doreg)
207 pcrec->bcast_msg_flags |= msg_flags;
208 else
209 pcrec->bcast_msg_flags &= ~msg_flags;
211 status = rec->store(rec, rec->value, TDB_REPLACE);
213 if (!NT_STATUS_IS_OK(status)) {
214 DEBUG(0,("register_message_flags: tdb_store failed: %s.\n",
215 nt_errstr(status)));
216 TALLOC_FREE(rec);
217 return False;
220 DEBUG(10,("register_message_flags: new flags 0x%x\n",
221 (unsigned int)pcrec->bcast_msg_flags ));
223 TALLOC_FREE(rec);
225 return True;