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"
32 #include "param/param.h"
34 #ifdef HAVE_SETPROCTITLE
35 #ifdef HAVE_SETPROCTITLE_H
36 #include <setproctitle.h>
39 #define setproctitle none_setproctitle
40 static int none_setproctitle(const char *fmt, ...) PRINTF_ATTRIBUTE(1, 2);
41 static int none_setproctitle(const char *fmt, ...)
48 called when the process model is selected
50 static void standard_model_init(struct event_context *ev)
52 signal(SIGCHLD, SIG_IGN);
56 called when a listening socket becomes readable.
58 static void standard_accept_connection(struct event_context *ev,
59 struct socket_context *sock,
60 void (*new_conn)(struct event_context *, struct socket_context *,
61 struct server_id , void *),
65 struct socket_context *sock2;
67 struct event_context *ev2;
68 struct socket_address *c, *s;
70 /* accept an incoming connection. */
71 status = socket_accept(sock, &sock2);
72 if (!NT_STATUS_IS_OK(status)) {
73 DEBUG(0,("standard_accept_connection: accept: %s\n",
75 /* this looks strange, but is correct. We need to throttle things until
76 the system clears enough resources to handle this new socket */
84 /* parent or error code ... */
86 /* go back to the event loop */
92 /* This is now the child code. We need a completely new event_context to work with */
93 ev2 = event_context_init(NULL);
95 /* the service has given us a private pointer that
96 encapsulates the context it needs for this new connection -
97 everything else will be freed */
98 talloc_steal(ev2, private);
99 talloc_steal(private, sock2);
101 /* this will free all the listening sockets and all state that
102 is not associated with this new connection */
106 /* we don't care if the dup fails, as its only a select()
107 speed optimisation */
110 /* tdb needs special fork handling */
111 if (tdb_reopen_all(1) == -1) {
112 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
115 /* Ensure that the forked children do not expose identical random streams */
116 set_need_random_reseed();
118 /* setup the process title */
119 c = socket_get_peer_addr(sock2, ev2);
120 s = socket_get_my_addr(sock2, ev2);
122 setproctitle("conn c[%s:%u] s[%s:%u] server_id[%d]",
123 c->addr, c->port, s->addr, s->port, pid);
128 /* setup this new connection */
129 new_conn(ev2, sock2, cluster_id(pid), private);
131 /* we can't return to the top level here, as that event context is gone,
132 so we now process events in the new event context until there are no
134 event_loop_wait(ev2);
141 called to create a new server task
143 static void standard_new_task(struct event_context *ev,
144 void (*new_task)(struct event_context *, struct server_id , void *),
148 struct event_context *ev2;
153 /* parent or error code ... go back to the event loop */
159 /* This is now the child code. We need a completely new event_context to work with */
160 ev2 = event_context_init(NULL);
162 /* the service has given us a private pointer that
163 encapsulates the context it needs for this new connection -
164 everything else will be freed */
165 talloc_steal(ev2, private);
167 /* this will free all the listening sockets and all state that
168 is not associated with this new connection */
171 /* tdb needs special fork handling */
172 if (tdb_reopen_all(1) == -1) {
173 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
176 /* Ensure that the forked children do not expose identical random streams */
177 set_need_random_reseed();
179 setproctitle("task server_id[%d]", pid);
181 /* setup this new connection */
182 new_task(ev2, cluster_id(pid), private);
184 /* we can't return to the top level here, as that event context is gone,
185 so we now process events in the new event context until there are no
187 event_loop_wait(ev2);
194 /* called when a task goes down */
195 _NORETURN_ static void standard_terminate(struct event_context *ev, const char *reason)
197 DEBUG(2,("standard_terminate: reason[%s]\n",reason));
199 /* this reload_charcnv() has the effect of freeing the iconv context memory,
200 which makes leak checking easier */
201 reload_charcnv(global_loadparm);
203 /* the secrets db should really hang off the connection structure */
208 /* terminate this process */
212 /* called to set a title of a task or connection */
213 static void standard_set_title(struct event_context *ev, const char *title)
216 setproctitle("%s", title);
222 static const struct model_ops standard_ops = {
224 .model_init = standard_model_init,
225 .accept_connection = standard_accept_connection,
226 .new_task = standard_new_task,
227 .terminate = standard_terminate,
228 .set_title = standard_set_title,
232 initialise the standard process model, registering ourselves with the process model subsystem
234 NTSTATUS process_model_standard_init(void)
236 return register_process_model(&standard_ops);