1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
Unix SMB/CIFS implementation.
process model: onefork (1 child process)
Copyright (C) Andrew Tridgell 1992-2005
Copyright (C) James J Myers 2003 <myersjj@samba.org>
Copyright (C) Stefan (metze) Metzmacher 2004
Copyright (C) Andrew Bartlett 2008 <abartlet@samba.org>
Copyright (C) David Disseldorp 2008 <ddiss@sgi.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "lib/events/events.h"
#include "lib/socket/socket.h"
#include "smbd/process_model.h"
#include "system/filesys.h"
#include "cluster/cluster.h"
#include "param/param.h"
#include "ldb_wrap.h"
#ifdef HAVE_SETPROCTITLE
#ifdef HAVE_SETPROCTITLE_H
#include <setproctitle.h>
#endif
#else
#define setproctitle none_setproctitle
static int none_setproctitle(const char *fmt, ...) PRINTF_ATTRIBUTE(1, 2);
static int none_setproctitle(const char *fmt, ...)
{
return 0;
}
#endif
NTSTATUS process_model_onefork_init(void);
/*
called when the process model is selected
*/
static void onefork_model_init(void)
{
signal(SIGCHLD, SIG_IGN);
}
static void onefork_reload_after_fork(void)
{
ldb_wrap_fork_hook();
/* Ensure that the forked children do not expose identical random streams */
set_need_random_reseed();
}
/*
called when a listening socket becomes readable.
*/
static void onefork_accept_connection(struct tevent_context *ev,
struct loadparm_context *lp_ctx,
struct socket_context *listen_socket,
void (*new_conn)(struct tevent_context *,
struct loadparm_context *, struct socket_context *,
struct server_id , void *),
void *private_data)
{
NTSTATUS status;
struct socket_context *connected_socket;
pid_t pid = getpid();
/* accept an incoming connection. */
status = socket_accept(listen_socket, &connected_socket);
if (!NT_STATUS_IS_OK(status)) {
return;
}
talloc_steal(private_data, connected_socket);
new_conn(ev, lp_ctx, connected_socket, cluster_id(pid, socket_get_fd(connected_socket)), private_data);
}
/*
called to create a new server task
*/
static void onefork_new_task(struct tevent_context *ev,
struct loadparm_context *lp_ctx,
const char *service_name,
void (*new_task_fn)(struct tevent_context *, struct loadparm_context *lp_ctx, struct server_id , void *),
void *private_data)
{
pid_t pid;
pid = fork();
if (pid != 0) {
/* parent or error code ... go back to the event loop */
return;
}
pid = getpid();
if (tevent_re_initialise(ev) != 0) {
smb_panic("Failed to re-initialise tevent after fork");
}
setproctitle("task %s server_id[%d]", service_name, (int)pid);
onefork_reload_after_fork();
/* setup this new connection: process will bind to it's sockets etc */
new_task_fn(ev, lp_ctx, cluster_id(pid, 0), private_data);
event_loop_wait(ev);
talloc_free(ev);
exit(0);
}
/* called when a task goes down */
static void onefork_terminate(struct tevent_context *ev, struct loadparm_context *lp_ctx, const char *reason)
{
DEBUG(2,("onefork_terminate: reason[%s]\n",reason));
}
/* called to set a title of a task or connection */
static void onefork_set_title(struct tevent_context *ev, const char *title)
{
if (title) {
setproctitle("%s", title);
} else {
setproctitle(NULL);
}
}
static const struct model_ops onefork_ops = {
.name = "onefork",
.model_init = onefork_model_init,
.accept_connection = onefork_accept_connection,
.new_task = onefork_new_task,
.terminate = onefork_terminate,
.set_title = onefork_set_title,
};
/*
initialise the onefork process model, registering ourselves with the process model subsystem
*/
NTSTATUS process_model_onefork_init(void)
{
return register_process_model(&onefork_ops);
}
|
