source: vendor/current/source3/smbd/server_exit.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 7.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Main SMB server routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Martin Pool 2002
6 Copyright (C) Jelmer Vernooij 2002-2003
7 Copyright (C) Volker Lendecke 1993-2007
8 Copyright (C) Jeremy Allison 1993-2007
9 Copyright (C) Andrew Bartlett 2010
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23*/
24
25#include "includes.h"
26#include "smbd/smbd.h"
27#include "smbd/globals.h"
28#include "ntdomain.h"
29#include "../librpc/gen_ndr/srv_dfs.h"
30#include "../librpc/gen_ndr/srv_dssetup.h"
31#include "../librpc/gen_ndr/srv_echo.h"
32#include "../librpc/gen_ndr/srv_eventlog.h"
33#include "../librpc/gen_ndr/srv_initshutdown.h"
34#include "../librpc/gen_ndr/srv_lsa.h"
35#include "../librpc/gen_ndr/srv_netlogon.h"
36#include "../librpc/gen_ndr/srv_ntsvcs.h"
37#include "../librpc/gen_ndr/srv_samr.h"
38#include "../librpc/gen_ndr/srv_spoolss.h"
39#include "../librpc/gen_ndr/srv_srvsvc.h"
40#include "../librpc/gen_ndr/srv_svcctl.h"
41#include "../librpc/gen_ndr/srv_winreg.h"
42#include "../librpc/gen_ndr/srv_wkssvc.h"
43#include "printing/notify.h"
44#include "printing.h"
45#include "serverid.h"
46#include "messages.h"
47#include "../lib/util/pidfile.h"
48#include "smbprofile.h"
49
50static struct files_struct *log_writeable_file_fn(
51 struct files_struct *fsp, void *private_data)
52{
53 bool *found = (bool *)private_data;
54 char *path;
55
56 if (!fsp->can_write) {
57 return NULL;
58 }
59 if (!(*found)) {
60 DEBUG(0, ("Writable files open at exit:\n"));
61 *found = true;
62 }
63
64 path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
65 smb_fname_str_dbg(fsp->fsp_name));
66 if (path == NULL) {
67 DEBUGADD(0, ("<NOMEM>\n"));
68 }
69
70 DEBUGADD(0, ("%s\n", path));
71
72 TALLOC_FREE(path);
73 return NULL;
74}
75
76/****************************************************************************
77 Exit the server.
78****************************************************************************/
79
80/* Reasons for shutting down a server process. */
81enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
82
83static void exit_server_common(enum server_exit_reason how,
84 const char *reason) _NORETURN_;
85
86static void exit_server_common(enum server_exit_reason how,
87 const char *reason)
88{
89 struct smbXsrv_client *client = global_smbXsrv_client;
90 struct smbXsrv_connection *xconn = NULL;
91 struct smbd_server_connection *sconn = NULL;
92 struct messaging_context *msg_ctx = server_messaging_context();
93
94 if (client != NULL) {
95 sconn = client->sconn;
96 /*
97 * Here we typically have just one connection
98 */
99 xconn = client->connections;
100 }
101
102 if (!exit_firsttime)
103 exit(0);
104 exit_firsttime = false;
105
106 change_to_root_user();
107
108 if (xconn != NULL) {
109 /*
110 * This is typically the disconnect for the only
111 * (or with multi-channel last) connection of the client
112 */
113 if (NT_STATUS_IS_OK(xconn->transport.status)) {
114 switch (how) {
115 case SERVER_EXIT_ABNORMAL:
116 xconn->transport.status = NT_STATUS_INTERNAL_ERROR;
117 break;
118 case SERVER_EXIT_NORMAL:
119 xconn->transport.status = NT_STATUS_LOCAL_DISCONNECT;
120 break;
121 }
122 }
123
124 TALLOC_FREE(xconn->smb1.negprot.auth_context);
125 }
126
127 change_to_root_user();
128
129 if (sconn != NULL) {
130 if (lp_log_writeable_files_on_exit()) {
131 bool found = false;
132 files_forall(sconn, log_writeable_file_fn, &found);
133 }
134 }
135
136 change_to_root_user();
137
138 if (xconn != NULL) {
139 NTSTATUS status;
140
141 /*
142 * Note: this is a no-op for smb2 as
143 * conn->tcon_table is empty
144 */
145 status = smb1srv_tcon_disconnect_all(xconn);
146 if (!NT_STATUS_IS_OK(status)) {
147 DEBUG(0,("Server exit (%s)\n",
148 (reason ? reason : "normal exit")));
149 DEBUG(0, ("exit_server_common: "
150 "smb1srv_tcon_disconnect_all() failed (%s) - "
151 "triggering cleanup\n", nt_errstr(status)));
152 how = SERVER_EXIT_ABNORMAL;
153 reason = "smb1srv_tcon_disconnect_all failed";
154 }
155
156 status = smbXsrv_session_logoff_all(xconn);
157 if (!NT_STATUS_IS_OK(status)) {
158 DEBUG(0,("Server exit (%s)\n",
159 (reason ? reason : "normal exit")));
160 DEBUG(0, ("exit_server_common: "
161 "smbXsrv_session_logoff_all() failed (%s) - "
162 "triggering cleanup\n", nt_errstr(status)));
163 how = SERVER_EXIT_ABNORMAL;
164 reason = "smbXsrv_session_logoff_all failed";
165 }
166 }
167
168 change_to_root_user();
169
170 /* 3 second timeout. */
171 print_notify_send_messages(msg_ctx, 3);
172
173 /* delete our entry in the serverid database. */
174 if (am_parent) {
175 /*
176 * For children the parent takes care of cleaning up
177 */
178 serverid_deregister(messaging_server_id(msg_ctx));
179 }
180
181#ifdef USE_DMAPI
182 /* Destroy Samba DMAPI session only if we are master smbd process */
183 if (am_parent) {
184 if (!dmapi_destroy_session()) {
185 DEBUG(0,("Unable to close Samba DMAPI session\n"));
186 }
187 }
188#endif
189
190 if (am_parent) {
191 rpc_wkssvc_shutdown();
192 rpc_dssetup_shutdown();
193#ifdef DEVELOPER
194 rpc_rpcecho_shutdown();
195#endif
196 rpc_netdfs_shutdown();
197 rpc_initshutdown_shutdown();
198 rpc_eventlog_shutdown();
199 rpc_ntsvcs_shutdown();
200 rpc_svcctl_shutdown();
201 rpc_spoolss_shutdown();
202
203 rpc_srvsvc_shutdown();
204 rpc_winreg_shutdown();
205
206 rpc_netlogon_shutdown();
207 rpc_samr_shutdown();
208 rpc_lsarpc_shutdown();
209 }
210
211 /*
212 * we need to force the order of freeing the following,
213 * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
214 */
215 if (client != NULL) {
216 struct smbXsrv_connection *next;
217
218 for (; xconn != NULL; xconn = next) {
219 next = xconn->next;
220 DLIST_REMOVE(client->connections, xconn);
221 talloc_free(xconn);
222 DO_PROFILE_INC(disconnect);
223 }
224 TALLOC_FREE(client->sconn);
225 }
226 sconn = NULL;
227 xconn = NULL;
228 client = NULL;
229 TALLOC_FREE(global_smbXsrv_client);
230 smbprofile_dump();
231 server_messaging_context_free();
232 server_event_context_free();
233 TALLOC_FREE(smbd_memcache_ctx);
234
235 locking_end();
236 printing_end();
237
238 if (how != SERVER_EXIT_NORMAL) {
239
240 smb_panic(reason);
241
242 /* Notreached. */
243 exit(1);
244 } else {
245 DEBUG(3,("Server exit (%s)\n",
246 (reason ? reason : "normal exit")));
247 if (am_parent) {
248 pidfile_unlink(lp_pid_directory(), "smbd");
249 }
250 gencache_stabilize();
251 }
252
253 exit(0);
254}
255
256void smbd_exit_server(const char *const explanation)
257{
258 exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
259}
260
261void smbd_exit_server_cleanly(const char *const explanation)
262{
263 exit_server_common(SERVER_EXIT_NORMAL, explanation);
264}
265
266/*
267 * reinit_after_fork() wrapper that should be called when forking from
268 * smbd.
269 */
270NTSTATUS smbd_reinit_after_fork(struct messaging_context *msg_ctx,
271 struct tevent_context *ev_ctx,
272 bool parent_longlived, const char *comment)
273{
274 am_parent = NULL;
275 return reinit_after_fork(msg_ctx, ev_ctx, parent_longlived, comment);
276}
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