--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ process model: prefork (n client connections per 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/tdb/include/tdb.h"
+#include "lib/socket/socket.h"
+#include "smbd/process_model.h"
+#include "param/secrets.h"
+#include "system/filesys.h"
+#include "cluster/cluster.h"
+#include "param/param.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
+
+/*
+ called when the process model is selected
+*/
+static void prefork_model_init(struct event_context *ev)
+{
+ signal(SIGCHLD, SIG_IGN);
+}
+
+/*
+ called when a listening socket becomes readable.
+*/
+static void prefork_accept_connection(struct event_context *ev,
+ struct loadparm_context *lp_ctx,
+ struct socket_context *sock,
+ void (*new_conn)(struct event_context *,
+ struct loadparm_context *, struct socket_context *,
+ struct server_id , void *),
+ void *private)
+{
+ NTSTATUS status;
+ struct socket_context *sock2;
+ pid_t pid = getpid();
+
+ /* accept an incoming connection. */
+ status = socket_accept(sock, &sock2);
+ if (!NT_STATUS_IS_OK(status)) {
+ return;
+ }
+
+ talloc_steal(private, sock);
+
+ new_conn(ev, lp_ctx, sock2, cluster_id(pid, socket_get_fd(sock2)), private);
+}
+
+/*
+ called to create a new server task
+*/
+static void prefork_new_task(struct event_context *ev,
+ struct loadparm_context *lp_ctx,
+ const char *service_name,
+ void (*new_task_fn)(struct event_context *, struct loadparm_context *lp_ctx, struct server_id , void *),
+ void *private)
+{
+ pid_t pid;
+ int i, num_children;
+
+ struct event_context *ev2, *ev_parent;
+
+ pid = fork();
+
+ if (pid != 0) {
+ /* parent or error code ... go back to the event loop */
+ return;
+ }
+
+ pid = getpid();
+
+ /* This is now the child code. We need a completely new event_context to work with */
+ ev2 = event_context_init(NULL);
+
+ /* the service has given us a private pointer that
+ encapsulates the context it needs for this new connection -
+ everything else will be freed */
+ talloc_steal(ev2, private);
+
+ /* this will free all the listening sockets and all state that
+ is not associated with this new connection */
+ talloc_free(ev);
+
+ /* tdb needs special fork handling */
+ if (tdb_reopen_all(1) == -1) {
+ DEBUG(0,("prefork_accept_connection: tdb_reopen_all failed.\n"));
+ }
+
+ /* Ensure that the forked children do not expose identical random streams */
+ set_need_random_reseed();
+
+ setproctitle("task %s server_id[%d]", service_name, pid);
+
+ /* setup this new connection: process will bind to it's sockets etc */
+ new_task_fn(ev2, lp_ctx, cluster_id(pid, 0), private);
+
+ num_children = lp_parm_int(lp_ctx, NULL, "prefork children", service_name, 0);
+ if (num_children == 0) {
+
+ /* We don't want any kids hanging around for this one,
+ * let the parent do all the work */
+ event_loop_wait(ev2);
+
+ talloc_free(ev2);
+ exit(0);
+ }
+
+ /* We are now free to spawn some child proccesses */
+
+ for (i=0; i < num_children; i++) {
+
+ pid = fork();
+ if (pid > 0) {
+ continue;
+ } else if (pid == -1) {
+ return;
+ } else {
+ pid = getpid();
+ setproctitle("task %s server_id[%d]", service_name, pid);
+ /* we can't return to the top level here, as that event context is gone,
+ so we now process events in the new event context until there are no
+ more to process */
+ event_loop_wait(ev2);
+
+ talloc_free(ev2);
+ exit(0);
+ }
+ }
+
+ /* Don't listen on the sockets we just gave to the children */
+ talloc_free(ev2);
+
+ /* But we need a events system to handle reaping children */
+ ev_parent = event_context_init(NULL);
+
+ /* TODO: Handle some events... */
+
+ /* we can't return to the top level here, as that event context is gone,
+ so we now process events in the new event context until there are no
+ more to process */
+ event_loop_wait(ev_parent);
+
+ talloc_free(ev_parent);
+ exit(0);
+
+}
+
+
+/* called when a task goes down */
+_NORETURN_ static void prefork_terminate(struct event_context *ev, const char *reason)
+{
+ DEBUG(2,("prefork_terminate: reason[%s]\n",reason));
+
+ /* this reload_charcnv() has the effect of freeing the iconv context memory,
+ which makes leak checking easier */
+ reload_charcnv(global_loadparm);
+
+ /* the secrets db should really hang off the connection structure */
+ secrets_shutdown();
+
+ talloc_free(ev);
+
+ /* terminate this process */
+ exit(0);
+}
+
+/* called to set a title of a task or connection */
+static void prefork_set_title(struct event_context *ev, const char *title)
+{
+ if (title) {
+ setproctitle("%s", title);
+ } else {
+ setproctitle(NULL);
+ }
+}
+
+static const struct model_ops prefork_ops = {
+ .name = "prefork",
+ .model_init = prefork_model_init,
+ .accept_connection = prefork_accept_connection,
+ .new_task = prefork_new_task,
+ .terminate = prefork_terminate,
+ .set_title = prefork_set_title,
+};
+
+/*
+ initialise the prefork process model, registering ourselves with the process model subsystem
+ */
+NTSTATUS process_model_prefork_init(void)
+{
+ return register_process_model(&prefork_ops);
+}
talloc_free(c);
talloc_free(s);
- /* setup this new connection */
- new_conn(ev2, lp_ctx, sock2, cluster_id(pid), private);
+ /* setup this new connection. Cluster ID is PID based for this process modal */
+ new_conn(ev2, lp_ctx, sock2, cluster_id(pid, 0), private);
/* we can't return to the top level here, as that event context is gone,
so we now process events in the new event context until there are no
*/
static void standard_new_task(struct event_context *ev,
struct loadparm_context *lp_ctx,
+ const char *service_name,
void (*new_task)(struct event_context *, struct loadparm_context *lp_ctx, struct server_id , void *),
void *private)
{
/* Ensure that the forked children do not expose identical random streams */
set_need_random_reseed();
- setproctitle("task server_id[%d]", pid);
+ setproctitle("task %s server_id[%d]", service_name, pid);
- /* setup this new connection */
- new_task(ev2, lp_ctx, cluster_id(pid), private);
+ /* setup this new task. Cluster ID is PID based for this process modal */
+ new_task(ev2, lp_ctx, cluster_id(pid, 0), private);
/* we can't return to the top level here, as that event context is gone,
so we now process events in the new event context until there are no
git.samba.org / metze / samba / wb-ndr.git / commitdiff