2 Unix SMB/CIFS implementation.
4 process model: process (1 process handles all client connections)
6 Copyright (C) Andrew Tridgell 2003
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 "smbd/process_model.h"
26 #include "system/filesys.h"
27 #include "cluster/cluster.h"
29 NTSTATUS process_model_single_init(TALLOC_CTX *);
32 called when the process model is selected
34 static void single_model_init(void)
39 called when a listening socket becomes readable.
41 static void single_accept_connection(struct tevent_context *ev,
42 struct loadparm_context *lp_ctx,
43 struct socket_context *listen_socket,
44 void (*new_conn)(struct tevent_context *,
45 struct loadparm_context *,
46 struct socket_context *,
47 struct server_id, void *,
50 void *process_context)
53 struct socket_context *connected_socket;
56 /* accept an incoming connection. */
57 status = socket_accept(listen_socket, &connected_socket);
58 if (!NT_STATUS_IS_OK(status)) {
59 DEBUG(0,("single_accept_connection: accept: %s\n", nt_errstr(status)));
60 /* this looks strange, but is correct.
62 We can only be here if woken up from select, due to
63 an incoming connection.
65 We need to throttle things until the system clears
66 enough resources to handle this new socket.
68 If we don't then we will spin filling the log and
69 causing more problems. We don't panic as this is
70 probably a temporary resource constraint */
75 talloc_steal(private_data, connected_socket);
78 * We use the PID so we cannot collide in with cluster ids
79 * generated in other single mode tasks, and, and won't
80 * collide with PIDs from process model standard because a the
81 * combination of pid/fd should be unique system-wide
83 new_conn(ev, lp_ctx, connected_socket,
84 cluster_id(pid, socket_get_fd(connected_socket)), private_data,
89 called to startup a new task
91 static void single_new_task(struct tevent_context *ev,
92 struct loadparm_context *lp_ctx,
93 const char *service_name,
94 void (*new_task)(struct tevent_context *,
95 struct loadparm_context *,
96 struct server_id, void *, void *),
98 const struct service_details *service_details,
101 pid_t pid = getpid();
102 /* start our taskids at MAX_INT32, the first 2^31 tasks are is reserved for fd numbers */
103 static uint32_t taskid = INT32_MAX;
106 * We use the PID so we cannot collide in with cluster ids
107 * generated in other single mode tasks, and, and won't
108 * collide with PIDs from process model starndard because a the
109 * combination of pid/task_id should be unique system-wide
111 * Using the pid unaltered makes debugging of which process
112 * owns the messaging socket easier.
114 new_task(ev, lp_ctx, cluster_id(pid, taskid++), private_data, NULL);
118 /* called when a task goes down */
119 static void single_terminate(struct tevent_context *ev,
120 struct loadparm_context *lp_ctx,
122 void *process_context)
124 DEBUG(3,("single_terminate: reason[%s]\n",reason));
127 /* called to set a title of a task or connection */
128 static void single_set_title(struct tevent_context *ev, const char *title)
132 const struct model_ops single_ops = {
134 .model_init = single_model_init,
135 .new_task = single_new_task,
136 .accept_connection = single_accept_connection,
137 .terminate = single_terminate,
138 .set_title = single_set_title,
142 initialise the single process model, registering ourselves with the
143 process model subsystem
145 NTSTATUS process_model_single_init(TALLOC_CTX *ctx)
147 return register_process_model(&single_ops);