{
DEBUG(10,("smb_conf_updated: Got message saying smb.conf was "
"updated. Reloading.\n"));
+ change_to_root_user();
reload_services(False);
}
}
#endif /* DEVELOPER */
-struct child_pid {
- struct child_pid *prev, *next;
- pid_t pid;
-};
-
-static void add_child_pid(pid_t pid)
+/*
+ * Parent smbd process sets its own debug level first and then
+ * sends a message to all the smbd children to adjust their debug
+ * level to that of the parent.
+ */
+
+static void smbd_msg_debug(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
{
struct child_pid *child;
- if (lp_max_smbd_processes() == 0) {
- /* Don't bother with the child list if we don't care anyway */
- return;
+ debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
+
+ for (child = children; child != NULL; child = child->next) {
+ messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
+ MSG_DEBUG,
+ data->data,
+ strlen((char *) data->data) + 1);
}
+}
+
+static void add_child_pid(pid_t pid)
+{
+ struct child_pid *child;
child = SMB_MALLOC_P(struct child_pid);
if (child == NULL) {
num_children += 1;
}
+/*
+ at most every smbd:cleanuptime seconds (default 20), we scan the BRL
+ and locking database for entries to cleanup. As a side effect this
+ also cleans up dead entries in the connections database (due to the
+ traversal in message_send_all()
+
+ Using a timer for this prevents a flood of traversals when a large
+ number of clients disconnect at the same time (perhaps due to a
+ network outage).
+*/
+
+static void cleanup_timeout_fn(struct event_context *event_ctx,
+ struct timed_event *te,
+ struct timeval now,
+ void *private_data)
+{
+ struct timed_event **cleanup_te = (struct timed_event **)private_data;
+
+ DEBUG(1,("Cleaning up brl and lock database after unclean shutdown\n"));
+ message_send_all(smbd_messaging_context(), MSG_SMB_UNLOCK, NULL, 0, NULL);
+ messaging_send_buf(smbd_messaging_context(), procid_self(),
+ MSG_SMB_BRL_VALIDATE, NULL, 0);
+ /* mark the cleanup as having been done */
+ (*cleanup_te) = NULL;
+}
+
static void remove_child_pid(pid_t pid, bool unclean_shutdown)
{
struct child_pid *child;
+ static struct timed_event *cleanup_te;
if (unclean_shutdown) {
- /* a child terminated uncleanly so tickle all processes to see
- if they can grab any of the pending locks
- */
- DEBUG(3,(__location__ " Unclean shutdown of pid %u\n", pid));
- messaging_send_buf(smbd_messaging_context(), procid_self(),
- MSG_SMB_BRL_VALIDATE, NULL, 0);
- message_send_all(smbd_messaging_context(),
- MSG_SMB_UNLOCK, NULL, 0, NULL);
- }
-
- if (lp_max_smbd_processes() == 0) {
- /* Don't bother with the child list if we don't care anyway */
- return;
+ /* a child terminated uncleanly so tickle all
+ processes to see if they can grab any of the
+ pending locks
+ */
+ DEBUG(3,(__location__ " Unclean shutdown of pid %u\n",
+ (unsigned int)pid));
+ if (!cleanup_te) {
+ /* call the cleanup timer, but not too often */
+ int cleanup_time = lp_parm_int(-1, "smbd", "cleanuptime", 20);
+ cleanup_te = event_add_timed(smbd_event_context(), NULL,
+ timeval_current_ofs(cleanup_time, 0),
+ cleanup_timeout_fn,
+ &cleanup_te);
+ DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
+ }
}
for (child = children; child != NULL; child = child->next) {
}
}
- DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
+ /* not all forked child processes are added to the children list */
+ DEBUG(1, ("Could not find child %d -- ignoring\n", (int)pid));
}
/****************************************************************************
pid = sys_fork();
if (pid == 0) {
+ NTSTATUS status = NT_STATUS_OK;
/* Child code ... */
am_parent = 0;
descriptors */
close_low_fds(False);
- TALLOC_FREE(s->parent);
+ /*
+ * Can't use TALLOC_FREE here. Nulling out the argument to it
+ * would overwrite memory we've just freed.
+ */
+ talloc_free(s->parent);
s = NULL;
- if (!reinit_after_fork(
- smbd_messaging_context(),
- smbd_event_context(),
- true)) {
+ status = reinit_after_fork(smbd_messaging_context(),
+ smbd_event_context(), true);
+ if (!NT_STATUS_IS_OK(status)) {
+ if (NT_STATUS_EQUAL(status,
+ NT_STATUS_TOO_MANY_OPENED_FILES)) {
+ DEBUG(0,("child process cannot initialize "
+ "because too many files are open\n"));
+ goto exit;
+ }
DEBUG(0,("reinit_after_fork() failed\n"));
smb_panic("reinit_after_fork() failed");
}
smbd_setup_sig_hup_handler();
smbd_process();
+ exit:
exit_server_cleanly("end of child");
return;
} else if (pid < 0) {
if (s->fd == -1) {
DEBUG(0,("smbd_open_once_socket: open_socket_in: "
"%s\n", strerror(errno)));
- close(s->fd);
TALLOC_FREE(s);
/*
* We ignore an error here, as we've done before
return true;
}
+static bool parent_housekeeping_fn(const struct timeval *now, void *private_data)
+{
+ DEBUG(5, ("houskeeping\n"));
+ /* check if we need to reload services */
+ check_reload(time(NULL));
+ return true;
+}
+
/****************************************************************************
Open the socket communication.
****************************************************************************/
continue;
}
+ /* Keep the first port for mDNS service
+ * registration.
+ */
+ if (dns_port == 0) {
+ dns_port = port;
+ }
+
if (!smbd_open_one_socket(parent, ifss, port)) {
return false;
}
claim_connection(NULL,"",
FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_DBWRAP);
+ if (!(event_add_idle(smbd_event_context(), NULL,
+ timeval_set(SMBD_HOUSEKEEPING_INTERVAL, 0),
+ "parent_housekeeping", parent_housekeeping_fn,
+ parent))) {
+ DEBUG(0, ("Could not add housekeeping event\n"));
+ exit(1);
+ }
+
/* Listen to messages */
messaging_register(smbd_messaging_context(), NULL,
MSG_SMB_CONF_UPDATED, smb_conf_updated);
messaging_register(smbd_messaging_context(), NULL,
MSG_SMB_STAT_CACHE_DELETE, smb_stat_cache_delete);
+ messaging_register(smbd_messaging_context(), NULL,
+ MSG_DEBUG, smbd_msg_debug);
brl_register_msgs(smbd_messaging_context());
#ifdef CLUSTER_SUPPORT
#endif
if (dns_port != 0) {
+#ifdef WITH_DNSSD_SUPPORT
smbd_setup_mdns_registration(smbd_event_context(),
parent, dns_port);
+#endif
+#ifdef WITH_AVAHI_SUPPORT
+ void *avahi_conn;
+
+ avahi_conn = avahi_start_register(
+ smbd_event_context(), smbd_event_context(), dns_port);
+ if (avahi_conn == NULL) {
+ DEBUG(10, ("avahi_start_register failed\n"));
+ }
+#endif
}
return true;
{
/* now accept incoming connections - forking a new process
for each incoming connection */
- DEBUG(2,("waiting for a connection\n"));
+ DEBUG(2,("waiting for connections\n"));
while (1) {
- struct timeval now, idle_timeout;
- fd_set r_fds, w_fds;
- int maxfd = 0;
- int num;
+ int ret;
TALLOC_CTX *frame = talloc_stackframe();
- if (run_events(smbd_event_context(), 0, NULL, NULL)) {
- TALLOC_FREE(frame);
- continue;
- }
-
- idle_timeout = timeval_zero();
-
- FD_ZERO(&w_fds);
- FD_ZERO(&r_fds);
- GetTimeOfDay(&now);
-
- event_add_to_select_args(smbd_event_context(), &now,
- &r_fds, &w_fds, &idle_timeout,
- &maxfd);
-
- num = sys_select(maxfd+1,&r_fds,&w_fds,NULL,
- timeval_is_zero(&idle_timeout) ?
- NULL : &idle_timeout);
-
- /* check if we need to reload services */
- check_reload(time(NULL));
-
- if (run_events(smbd_event_context(), num, &r_fds, &w_fds)) {
- TALLOC_FREE(frame);
- continue;
+ ret = tevent_loop_once(smbd_event_context());
+ if (ret != 0) {
+ exit_server_cleanly("tevent_loop_once() error");
}
- /* If the idle timeout fired and we don't have any connected
- * users, exit gracefully. We should be running under a process
- * controller that will restart us if necessry.
- */
- if (num == 0 && count_all_current_connections() == 0) {
- exit_server_cleanly("idle timeout");
- }
TALLOC_FREE(frame);
} /* end while 1 */
/* NOTREACHED return True; */
}
-/****************************************************************************
- Reload printers
-**************************************************************************/
+/***************************************************************************
+ purge stale printers and reload from pre-populated pcap cache
+***************************************************************************/
void reload_printers(void)
{
int snum;
int pnum = lp_servicenumber(PRINTERS_NAME);
const char *pname;
- pcap_cache_reload();
-
- /* remove stale printers */
+ DEBUG(10, ("reloading printer services from pcap cache\n"));
for (snum = 0; snum < n_services; snum++) {
/* avoid removing PRINTERS_NAME or non-autoloaded printers */
if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
DEBUG(3, ("removing stale printer %s\n", pname));
if (is_printer_published(NULL, snum, NULL))
- nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
+ nt_printer_publish(NULL, snum, DSPRINT_UNPUBLISH);
del_a_printer(pname);
lp_killservice(snum);
}
set_dyn_CONFIGFILE(fname);
test = False;
}
+ TALLOC_FREE(fname);
}
reopen_logs();
ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
- reload_printers();
+ pcap_cache_reload(&reload_printers);
/* perhaps the config filename is now set */
if (!test)
static void exit_server_common(enum server_exit_reason how,
const char *const reason)
{
- bool had_open_conn;
+ bool had_open_conn = false;
+ struct smbd_server_connection *sconn = smbd_server_conn;
if (!exit_firsttime)
exit(0);
change_to_root_user();
- if (negprot_global_auth_context) {
- (negprot_global_auth_context->free)(&negprot_global_auth_context);
+ if (sconn && sconn->smb1.negprot.auth_context) {
+ struct auth_context *a = sconn->smb1.negprot.auth_context;
+ a->free(&sconn->smb1.negprot.auth_context);
}
- had_open_conn = conn_close_all();
-
- invalidate_all_vuids();
+ if (sconn) {
+ had_open_conn = conn_close_all(sconn);
+ invalidate_all_vuids(sconn);
+ }
/* 3 second timeout. */
print_notify_send_messages(smbd_messaging_context(), 3);
locking_end();
printing_end();
+ /*
+ * we need to force the order of freeing the following,
+ * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
+ */
+ sconn = NULL;
+ TALLOC_FREE(smbd_server_conn);
+ TALLOC_FREE(smbd_msg_ctx);
+ TALLOC_FREE(smbd_event_ctx);
+
if (how != SERVER_EXIT_NORMAL) {
int oldlevel = DEBUGLEVEL;
} else {
DEBUG(3,("Server exit (%s)\n",
(reason ? reason : "normal exit")));
+ if (am_parent) {
+ pidfile_unlink();
+ }
+ gencache_stabilize();
}
/* if we had any open SMB connections when we exited then we
if (!init_names())
return False;
- conn_init();
-
file_init();
- init_dptrs();
-
if (!secrets_init())
return False;
BlockSignals(False, SIGUSR1);
BlockSignals(False, SIGTERM);
+ /* Ensure we leave no zombies until we
+ * correctly set up child handling below. */
+
+ CatchChild();
+
/* we want total control over the permissions on created files,
so set our umask to 0 */
umask(0);
if (is_daemon)
pidfile_create("smbd");
- if (!reinit_after_fork(smbd_messaging_context(),
- smbd_event_context(), false)) {
+ if (!NT_STATUS_IS_OK(reinit_after_fork(smbd_messaging_context(),
+ smbd_event_context(), false))) {
DEBUG(0,("reinit_after_fork() failed\n"));
exit(1);
}
return -1;
}
+ /* Open the share_info.tdb here, so we don't have to open
+ after the fork on every single connection. This is a small
+ performance improvment and reduces the total number of system
+ fds used. */
+ if (!share_info_db_init()) {
+ DEBUG(0,("ERROR: failed to load share info db.\n"));
+ exit(1);
+ }
+
/* only start the background queue daemon if we are
running as a daemon -- bad things will happen if
smbd is launched via inetd and we fork a copy of
/* close our standard file descriptors */
close_low_fds(False); /* Don't close stderr */
+#ifdef HAVE_ATEXIT
+ atexit(killkids);
+#endif
+
+ /* Stop zombies */
+ smbd_setup_sig_chld_handler();
+
smbd_process();
exit_server_cleanly(NULL);
exit_server("open_sockets_smbd() failed");
TALLOC_FREE(frame);
+ /* make sure we always have a valid stackframe */
+ frame = talloc_stackframe();
smbd_parent_loop(parent);
exit_server_cleanly(NULL);
+ TALLOC_FREE(frame);
return(0);
}
git.samba.org / samba.git / blobdiff