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 3 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, see <http://www.gnu.org/licenses/>.
25 #include "lib/events/events.h"
26 #include "lib/tdb/include/tdb.h"
27 #include "lib/socket/socket.h"
28 #include "smbd/process_model.h"
29 #include "param/secrets.h"
30 #include "system/filesys.h"
31 #include "cluster/cluster.h"
33 #ifdef HAVE_SETPROCTITLE
34 #ifdef HAVE_SETPROCTITLE_H
35 #include <setproctitle.h>
38 #define setproctitle none_setproctitle
39 static int none_setproctitle(const char *fmt, ...) PRINTF_ATTRIBUTE(1, 2);
40 static int none_setproctitle(const char *fmt, ...)
47 called when the process model is selected
49 static void standard_model_init(struct event_context *ev)
51 signal(SIGCHLD, SIG_IGN);
55 called when a listening socket becomes readable.
57 static void standard_accept_connection(struct event_context *ev,
58 struct socket_context *sock,
59 void (*new_conn)(struct event_context *, struct socket_context *,
60 struct server_id , void *),
64 struct socket_context *sock2;
66 struct event_context *ev2;
67 struct socket_address *c, *s;
69 /* accept an incoming connection. */
70 status = socket_accept(sock, &sock2);
71 if (!NT_STATUS_IS_OK(status)) {
72 DEBUG(0,("standard_accept_connection: accept: %s\n",
74 /* this looks strange, but is correct. We need to throttle things until
75 the system clears enough resources to handle this new socket */
83 /* parent or error code ... */
85 /* go back to the event loop */
91 /* This is now the child code. We need a completely new event_context to work with */
92 ev2 = event_context_init(NULL);
94 /* the service has given us a private pointer that
95 encapsulates the context it needs for this new connection -
96 everything else will be freed */
97 talloc_steal(ev2, private);
98 talloc_steal(private, sock2);
100 /* this will free all the listening sockets and all state that
101 is not associated with this new connection */
105 /* we don't care if the dup fails, as its only a select()
106 speed optimisation */
109 /* tdb needs special fork handling */
110 if (tdb_reopen_all(1) == -1) {
111 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
114 /* Ensure that the forked children do not expose identical random streams */
115 set_need_random_reseed();
117 /* setup the process title */
118 c = socket_get_peer_addr(sock2, ev2);
119 s = socket_get_my_addr(sock2, ev2);
121 setproctitle("conn c[%s:%u] s[%s:%u] server_id[%d]",
122 c->addr, c->port, s->addr, s->port, pid);
127 /* setup this new connection */
128 new_conn(ev2, sock2, cluster_id(pid), private);
130 /* we can't return to the top level here, as that event context is gone,
131 so we now process events in the new event context until there are no
133 event_loop_wait(ev2);
140 called to create a new server task
142 static void standard_new_task(struct event_context *ev,
143 void (*new_task)(struct event_context *, struct server_id , void *),
147 struct event_context *ev2;
152 /* parent or error code ... go back to the event loop */
158 /* This is now the child code. We need a completely new event_context to work with */
159 ev2 = event_context_init(NULL);
161 /* the service has given us a private pointer that
162 encapsulates the context it needs for this new connection -
163 everything else will be freed */
164 talloc_steal(ev2, private);
166 /* this will free all the listening sockets and all state that
167 is not associated with this new connection */
170 /* tdb needs special fork handling */
171 if (tdb_reopen_all(1) == -1) {
172 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
175 /* Ensure that the forked children do not expose identical random streams */
176 set_need_random_reseed();
178 setproctitle("task server_id[%d]", pid);
180 /* setup this new connection */
181 new_task(ev2, cluster_id(pid), private);
183 /* we can't return to the top level here, as that event context is gone,
184 so we now process events in the new event context until there are no
186 event_loop_wait(ev2);
193 /* called when a task goes down */
194 _NORETURN_ static void standard_terminate(struct event_context *ev, const char *reason)
196 DEBUG(2,("standard_terminate: reason[%s]\n",reason));
198 /* this close_iconv() has the effect of freeing the iconv context memory,
199 which makes leak checking easier */
202 /* the secrets db should really hang off the connection structure */
207 /* terminate this process */
211 /* called to set a title of a task or connection */
212 static void standard_set_title(struct event_context *ev, const char *title)
215 setproctitle("%s", title);
221 static const struct model_ops standard_ops = {
223 .model_init = standard_model_init,
224 .accept_connection = standard_accept_connection,
225 .new_task = standard_new_task,
226 .terminate = standard_terminate,
227 .set_title = standard_set_title,
231 initialise the standard process model, registering ourselves with the process model subsystem
233 NTSTATUS process_model_standard_init(void)
235 return register_process_model(&standard_ops);