2 Unix SMB/CIFS implementation.
4 process model: standard (1 process per client connection)
6 Copyright (C) Andrew Tridgell 1992-2005
7 Copyright (C) James J Myers 2003 <myersjj@samba.org>
8 Copyright (C) Stefan (metze) Metzmacher 2004
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "lib/events/events.h"
27 #include "lib/tdb/include/tdb.h"
28 #include "lib/socket/socket.h"
29 #include "smbd/process_model.h"
31 /* For specifiying event context to GSSAPI below */
32 #include "system/kerberos.h"
33 #include "heimdal/lib/gssapi/gssapi_locl.h"
35 #include "passdb/secrets.h"
37 #ifdef HAVE_SETPROCTITLE
38 #ifdef HAVE_SETPROCTITLE_H
39 #include <setproctitle.h>
42 static int setproctitle(const char *fmt, ...) PRINTF_ATTRIBUTE(1, 2);
43 static int setproctitle(const char *fmt, ...)
50 called when the process model is selected
52 static void standard_model_init(struct event_context *ev)
54 signal(SIGCHLD, SIG_IGN);
58 called when a listening socket becomes readable.
60 static void standard_accept_connection(struct event_context *ev,
61 struct socket_context *sock,
62 void (*new_conn)(struct event_context *, struct socket_context *,
67 struct socket_context *sock2;
69 struct event_context *ev2;
70 struct socket_address *c, *s;
72 /* accept an incoming connection. */
73 status = socket_accept(sock, &sock2);
74 if (!NT_STATUS_IS_OK(status)) {
75 DEBUG(0,("standard_accept_connection: accept: %s\n",
77 /* this looks strange, but is correct. We need to throttle things until
78 the system clears enough resources to handle this new socket */
86 /* parent or error code ... */
88 /* go back to the event loop */
94 /* This is now the child code. We need a completely new event_context to work with */
95 ev2 = event_context_init(NULL);
97 /* the service has given us a private pointer that
98 encapsulates the context it needs for this new connection -
99 everything else will be freed */
100 talloc_steal(ev2, private);
101 talloc_steal(private, sock2);
103 /* this will free all the listening sockets and all state that
104 is not associated with this new connection */
108 /* we don't care if the dup fails, as its only a select()
109 speed optimisation */
112 /* tdb needs special fork handling */
113 if (tdb_reopen_all(1) == -1) {
114 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
117 /* Hack to ensure that GSSAPI uses the right event context */
118 gssapi_krb5_init_ev(ev2);
120 /* Ensure that the forked children do not expose identical random streams */
121 set_need_random_reseed();
123 /* setup the process title */
124 c = socket_get_peer_addr(sock2, ev2);
125 s = socket_get_my_addr(sock2, ev2);
127 setproctitle("conn c[%s:%u] s[%s:%u] server_id[%d]",
128 c->addr, c->port, s->addr, s->port, pid);
133 /* setup this new connection */
134 new_conn(ev2, sock2, pid, private);
136 /* we can't return to the top level here, as that event context is gone,
137 so we now process events in the new event context until there are no
139 event_loop_wait(ev2);
146 called to create a new server task
148 static void standard_new_task(struct event_context *ev,
149 void (*new_task)(struct event_context *, uint32_t , void *),
153 struct event_context *ev2;
158 /* parent or error code ... go back to the event loop */
164 /* This is now the child code. We need a completely new event_context to work with */
165 ev2 = event_context_init(NULL);
167 /* the service has given us a private pointer that
168 encapsulates the context it needs for this new connection -
169 everything else will be freed */
170 talloc_steal(ev2, private);
172 /* this will free all the listening sockets and all state that
173 is not associated with this new connection */
176 /* tdb needs special fork handling */
177 if (tdb_reopen_all(1) == -1) {
178 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
181 /* Ensure that the forked children do not expose identical random streams */
182 set_need_random_reseed();
184 setproctitle("task server_id[%d]", pid);
186 /* setup this new connection */
187 new_task(ev2, pid, private);
189 /* we can't return to the top level here, as that event context is gone,
190 so we now process events in the new event context until there are no
192 event_loop_wait(ev2);
199 /* called when a task goes down */
200 static void standard_terminate(struct event_context *ev, const char *reason)
202 DEBUG(2,("standard_terminate: reason[%s]\n",reason));
204 /* this init_iconv() has the effect of freeing the iconv context memory,
205 which makes leak checking easier */
208 /* the secrets db should really hang off the connection structure */
213 /* terminate this process */
217 /* called to set a title of a task or connection */
218 static void standard_set_title(struct event_context *ev, const char *title)
221 setproctitle("%s", title);
227 static const struct model_ops standard_ops = {
229 .model_init = standard_model_init,
230 .accept_connection = standard_accept_connection,
231 .new_task = standard_new_task,
232 .terminate = standard_terminate,
233 .set_title = standard_set_title,
237 initialise the standard process model, registering ourselves with the process model subsystem
239 NTSTATUS process_model_standard_init(void)
241 return register_process_model(&standard_ops);