2 * Unix SMB/CIFS implementation.
6 * Copyright (c) 2011 Andreas Schneider <asn@samba.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, see <http://www.gnu.org/licenses/>.
27 #include "lib/id_cache.h"
29 #include "../lib/tsocket/tsocket.h"
30 #include "lib/server_prefork.h"
31 #include "lib/server_prefork_util.h"
32 #include "librpc/rpc/dcerpc_ep.h"
34 #include "rpc_server/rpc_server.h"
35 #include "rpc_server/rpc_ep_register.h"
36 #include "rpc_server/rpc_sock_helper.h"
38 #include "librpc/gen_ndr/srv_lsa.h"
39 #include "librpc/gen_ndr/srv_samr.h"
40 #include "librpc/gen_ndr/srv_netlogon.h"
42 #define DAEMON_NAME "lsasd"
43 #define LSASD_MAX_SOCKETS 64
45 static struct server_id parent_id;
46 static struct prefork_pool *lsasd_pool = NULL;
47 static int lsasd_child_id = 0;
49 static struct pf_daemon_config default_pf_lsasd_cfg = {
50 .prefork_status = PFH_INIT,
54 .max_allowed_clients = 100,
55 .child_min_life = 60 /* 1 minute minimum life time */
57 static struct pf_daemon_config pf_lsasd_cfg = { 0 };
59 void start_lsasd(struct tevent_context *ev_ctx,
60 struct messaging_context *msg_ctx);
62 static void lsasd_reopen_logs(int child_id)
64 char *lfile = lp_logfile(talloc_tos());
69 rc = asprintf(&extension, "%s.%d", DAEMON_NAME, child_id);
71 rc = asprintf(&extension, "%s", DAEMON_NAME);
78 if (lfile == NULL || lfile[0] == '\0') {
79 rc = asprintf(&lfile, "%s/log.%s",
80 get_dyn_LOGFILEBASE(), extension);
82 if (strstr(lfile, extension) == NULL) {
84 rc = asprintf(&lfile, "%s.%d",
85 lp_logfile(talloc_tos()),
88 rc = asprintf(&lfile, "%s.%s",
89 lp_logfile(talloc_tos()),
96 lp_set_logfile(lfile);
100 SAFE_FREE(extension);
105 static void lsasd_smb_conf_updated(struct messaging_context *msg,
108 struct server_id server_id,
111 struct tevent_context *ev_ctx;
113 DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
114 ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
116 change_to_root_user();
117 lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
119 lsasd_reopen_logs(lsasd_child_id);
120 if (lsasd_child_id == 0) {
121 pfh_daemon_config(DAEMON_NAME,
123 &default_pf_lsasd_cfg);
124 pfh_manage_pool(ev_ctx, msg, &pf_lsasd_cfg, lsasd_pool);
128 static void lsasd_sig_term_handler(struct tevent_context *ev,
129 struct tevent_signal *se,
135 rpc_netlogon_shutdown();
137 rpc_lsarpc_shutdown();
139 DEBUG(0, ("termination signal\n"));
143 static void lsasd_setup_sig_term_handler(struct tevent_context *ev_ctx)
145 struct tevent_signal *se;
147 se = tevent_add_signal(ev_ctx,
150 lsasd_sig_term_handler,
153 DEBUG(0, ("failed to setup SIGTERM handler\n"));
158 static void lsasd_sig_hup_handler(struct tevent_context *ev,
159 struct tevent_signal *se,
166 change_to_root_user();
167 lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
169 lsasd_reopen_logs(lsasd_child_id);
170 pfh_daemon_config(DAEMON_NAME,
172 &default_pf_lsasd_cfg);
174 /* relay to all children */
175 prefork_send_signal_to_all(lsasd_pool, SIGHUP);
178 static void lsasd_setup_sig_hup_handler(struct tevent_context *ev_ctx)
180 struct tevent_signal *se;
182 se = tevent_add_signal(ev_ctx,
185 lsasd_sig_hup_handler,
188 DEBUG(0, ("failed to setup SIGHUP handler\n"));
193 /**********************************************************
195 **********************************************************/
197 static void lsasd_chld_sig_hup_handler(struct tevent_context *ev,
198 struct tevent_signal *se,
204 change_to_root_user();
205 lsasd_reopen_logs(lsasd_child_id);
208 static bool lsasd_setup_chld_hup_handler(struct tevent_context *ev_ctx)
210 struct tevent_signal *se;
212 se = tevent_add_signal(ev_ctx,
215 lsasd_chld_sig_hup_handler,
218 DEBUG(1, ("failed to setup SIGHUP handler"));
225 static void parent_ping(struct messaging_context *msg_ctx,
228 struct server_id server_id,
232 /* The fact we received this message is enough to let make the event
233 * loop if it was idle. lsasd_children_main will cycle through
234 * lsasd_next_client at least once. That function will take whatever
235 * action is necessary */
237 DEBUG(10, ("Got message that the parent changed status.\n"));
241 static bool lsasd_child_init(struct tevent_context *ev_ctx,
243 struct pf_worker_data *pf)
246 struct messaging_context *msg_ctx = server_messaging_context();
249 status = reinit_after_fork(msg_ctx, ev_ctx,
251 if (!NT_STATUS_IS_OK(status)) {
252 DEBUG(0,("reinit_after_fork() failed\n"));
253 smb_panic("reinit_after_fork() failed");
256 lsasd_child_id = child_id;
257 lsasd_reopen_logs(child_id);
259 ok = lsasd_setup_chld_hup_handler(ev_ctx);
264 if (!serverid_register(messaging_server_id(msg_ctx),
269 messaging_register(msg_ctx, ev_ctx,
270 MSG_SMB_CONF_UPDATED, lsasd_smb_conf_updated);
271 messaging_register(msg_ctx, ev_ctx,
272 MSG_PREFORK_PARENT_EVENT, parent_ping);
273 id_cache_register_msgs(msg_ctx);
275 status = rpc_lsarpc_init(NULL);
276 if (!NT_STATUS_IS_OK(status)) {
277 DEBUG(0, ("Failed to register lsarpc rpc inteface! (%s)\n",
282 status = rpc_samr_init(NULL);
283 if (!NT_STATUS_IS_OK(status)) {
284 DEBUG(0, ("Failed to register samr rpc inteface! (%s)\n",
289 status = rpc_netlogon_init(NULL);
290 if (!NT_STATUS_IS_OK(status)) {
291 DEBUG(0, ("Failed to register netlogon rpc inteface! (%s)\n",
299 struct lsasd_children_data {
300 struct tevent_context *ev_ctx;
301 struct messaging_context *msg_ctx;
302 struct pf_worker_data *pf;
307 static void lsasd_next_client(void *pvt);
309 static int lsasd_children_main(struct tevent_context *ev_ctx,
310 struct messaging_context *msg_ctx,
311 struct pf_worker_data *pf,
317 struct lsasd_children_data *data;
321 ok = lsasd_child_init(ev_ctx, child_id, pf);
326 data = talloc(ev_ctx, struct lsasd_children_data);
331 data->ev_ctx = ev_ctx;
332 data->msg_ctx = msg_ctx;
333 data->listen_fd_size = listen_fd_size;
334 data->listen_fds = listen_fds;
336 /* loop until it is time to exit */
337 while (pf->status != PF_WORKER_EXITING) {
338 /* try to see if it is time to schedule the next client */
339 lsasd_next_client(data);
341 ret = tevent_loop_once(ev_ctx);
343 DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
344 ret, strerror(errno)));
345 pf->status = PF_WORKER_EXITING;
352 static void lsasd_client_terminated(void *pvt)
354 struct lsasd_children_data *data;
356 data = talloc_get_type_abort(pvt, struct lsasd_children_data);
358 pfh_client_terminated(data->pf);
360 lsasd_next_client(pvt);
363 struct lsasd_new_client {
364 struct lsasd_children_data *data;
367 static void lsasd_handle_client(struct tevent_req *req);
369 static void lsasd_next_client(void *pvt)
371 struct tevent_req *req;
372 struct lsasd_children_data *data;
373 struct lsasd_new_client *next;
375 data = talloc_get_type_abort(pvt, struct lsasd_children_data);
377 if (!pfh_child_allowed_to_accept(data->pf)) {
378 /* nothing to do for now we are already listening
379 * or we are not allowed to listen further */
383 next = talloc_zero(data, struct lsasd_new_client);
385 DEBUG(1, ("Out of memory!?\n"));
390 req = prefork_listen_send(next,
393 data->listen_fd_size,
396 DEBUG(1, ("Failed to make listening request!?\n"));
400 tevent_req_set_callback(req, lsasd_handle_client, next);
403 static void lsasd_handle_client(struct tevent_req *req)
405 struct lsasd_children_data *data;
406 struct lsasd_new_client *client;
407 const DATA_BLOB ping = data_blob_null;
411 struct tsocket_address *srv_addr;
412 struct tsocket_address *cli_addr;
414 client = tevent_req_callback_data(req, struct lsasd_new_client);
417 tmp_ctx = talloc_stackframe();
418 if (tmp_ctx == NULL) {
419 DEBUG(1, ("Failed to allocate stackframe!\n"));
423 rc = prefork_listen_recv(req,
429 /* this will free the request too */
433 DEBUG(6, ("No client connection was available after all!\n"));
437 /* Warn parent that our status changed */
438 messaging_send(data->msg_ctx, parent_id,
439 MSG_PREFORK_CHILD_EVENT, &ping);
441 DEBUG(2, ("LSASD preforked child %d got client connection!\n",
442 (int)(data->pf->pid)));
444 if (tsocket_address_is_inet(srv_addr, "ip")) {
445 DEBUG(3, ("Got a tcpip client connection from %s on inteface %s\n",
446 tsocket_address_string(cli_addr, tmp_ctx),
447 tsocket_address_string(srv_addr, tmp_ctx)));
449 dcerpc_ncacn_accept(data->ev_ctx,
457 } else if (tsocket_address_is_unix(srv_addr)) {
461 p = tsocket_address_unix_path(srv_addr, tmp_ctx);
463 talloc_free(tmp_ctx);
474 if (strstr(p, "/np/")) {
475 named_pipe_accept_function(data->ev_ctx,
479 lsasd_client_terminated,
482 dcerpc_ncacn_accept(data->ev_ctx,
492 DEBUG(0, ("ERROR: Unsupported socket!\n"));
496 talloc_free(tmp_ctx);
503 static void child_ping(struct messaging_context *msg_ctx,
506 struct server_id server_id,
509 struct tevent_context *ev_ctx;
511 ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
513 DEBUG(10, ("Got message that a child changed status.\n"));
514 pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
517 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
518 struct messaging_context *msg_ctx,
519 struct timeval current_time);
521 static void lsasd_check_children(struct tevent_context *ev_ctx,
522 struct tevent_timer *te,
523 struct timeval current_time,
526 static void lsasd_sigchld_handler(struct tevent_context *ev_ctx,
527 struct prefork_pool *pfp,
530 struct messaging_context *msg_ctx;
532 msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
534 /* run pool management so we can fork/retire or increase
535 * the allowed connections per child based on load */
536 pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
539 static bool lsasd_setup_children_monitor(struct tevent_context *ev_ctx,
540 struct messaging_context *msg_ctx)
544 /* add our oun sigchld callback */
545 prefork_set_sigchld_callback(lsasd_pool, lsasd_sigchld_handler, msg_ctx);
547 ok = lsasd_schedule_check(ev_ctx, msg_ctx, tevent_timeval_current());
552 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
553 struct messaging_context *msg_ctx,
554 struct timeval current_time)
556 struct tevent_timer *te;
557 struct timeval next_event;
559 /* check situation again in 10 seconds */
560 next_event = tevent_timeval_current_ofs(10, 0);
562 /* TODO: check when the socket becomes readable, so that children
563 * are checked only when there is some activity ? */
564 te = tevent_add_timer(ev_ctx, lsasd_pool, next_event,
565 lsasd_check_children, msg_ctx);
567 DEBUG(2, ("Failed to set up children monitoring!\n"));
574 static void lsasd_check_children(struct tevent_context *ev_ctx,
575 struct tevent_timer *te,
576 struct timeval current_time,
579 struct messaging_context *msg_ctx;
581 msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
583 pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
585 lsasd_schedule_check(ev_ctx, msg_ctx, current_time);
592 static bool lsasd_create_sockets(struct tevent_context *ev_ctx,
593 struct messaging_context *msg_ctx,
597 struct dcerpc_binding_vector *v, *v_orig;
605 tmp_ctx = talloc_stackframe();
606 if (tmp_ctx == NULL) {
610 status = dcerpc_binding_vector_new(tmp_ctx, &v_orig);
611 if (!NT_STATUS_IS_OK(status)) {
616 /* Create only one tcpip listener for all services */
617 status = rpc_create_tcpip_sockets(&ndr_table_lsarpc,
622 if (!NT_STATUS_IS_OK(status)) {
627 /* Start to listen on tcpip sockets */
628 for (i = 0; i < *listen_fd_size; i++) {
629 rc = listen(listen_fd[i], pf_lsasd_cfg.max_allowed_clients);
631 DEBUG(0, ("Failed to listen on tcpip socket - %s\n",
639 fd = create_named_pipe_socket("lsarpc");
644 listen_fd[*listen_fd_size] = fd;
647 rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
649 DEBUG(0, ("Failed to listen on lsarpc pipe - %s\n",
655 fd = create_named_pipe_socket("lsass");
660 listen_fd[*listen_fd_size] = fd;
663 rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
665 DEBUG(0, ("Failed to listen on lsass pipe - %s\n",
671 fd = create_dcerpc_ncalrpc_socket("lsarpc");
676 listen_fd[*listen_fd_size] = fd;
679 rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
681 DEBUG(0, ("Failed to listen on lsarpc ncalrpc - %s\n",
687 v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
693 status = dcerpc_binding_vector_replace_iface(&ndr_table_lsarpc, v);
694 if (!NT_STATUS_IS_OK(status)) {
698 status = dcerpc_binding_vector_add_np_default(&ndr_table_lsarpc, v);
699 if (!NT_STATUS_IS_OK(status)) {
704 status = dcerpc_binding_vector_add_unix(&ndr_table_lsarpc, v, "lsarpc");
705 if (!NT_STATUS_IS_OK(status)) {
710 status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_lsarpc, v);
711 if (!NT_STATUS_IS_OK(status)) {
717 fd = create_named_pipe_socket("samr");
723 rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
725 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
730 listen_fd[*listen_fd_size] = fd;
733 fd = create_dcerpc_ncalrpc_socket("samr");
738 listen_fd[*listen_fd_size] = fd;
741 rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
743 DEBUG(0, ("Failed to listen on samr ncalrpc - %s\n",
749 v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
755 status = dcerpc_binding_vector_replace_iface(&ndr_table_samr, v);
756 if (!NT_STATUS_IS_OK(status)) {
760 status = dcerpc_binding_vector_add_np_default(&ndr_table_samr, v);
761 if (!NT_STATUS_IS_OK(status)) {
766 status = dcerpc_binding_vector_add_unix(&ndr_table_lsarpc, v, "samr");
767 if (!NT_STATUS_IS_OK(status)) {
772 status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_samr, v);
773 if (!NT_STATUS_IS_OK(status)) {
779 fd = create_named_pipe_socket("netlogon");
785 rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
787 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
792 listen_fd[*listen_fd_size] = fd;
795 fd = create_dcerpc_ncalrpc_socket("netlogon");
800 listen_fd[*listen_fd_size] = fd;
803 rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
805 DEBUG(0, ("Failed to listen on netlogon ncalrpc - %s\n",
811 v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
817 status = dcerpc_binding_vector_replace_iface(&ndr_table_netlogon, v);
818 if (!NT_STATUS_IS_OK(status)) {
822 status = dcerpc_binding_vector_add_np_default(&ndr_table_netlogon, v);
823 if (!NT_STATUS_IS_OK(status)) {
828 status = dcerpc_binding_vector_add_unix(&ndr_table_lsarpc, v, "netlogon");
829 if (!NT_STATUS_IS_OK(status)) {
834 status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_netlogon, v);
835 if (!NT_STATUS_IS_OK(status)) {
841 talloc_free(tmp_ctx);
845 void start_lsasd(struct tevent_context *ev_ctx,
846 struct messaging_context *msg_ctx)
849 int listen_fd[LSASD_MAX_SOCKETS];
850 int listen_fd_size = 0;
855 DEBUG(1, ("Forking LSA Service Daemon\n"));
858 * Block signals before forking child as it will have to
859 * set its own handlers. Child will re-enable SIGHUP as
860 * soon as the handlers are set up.
862 BlockSignals(true, SIGTERM);
863 BlockSignals(true, SIGHUP);
867 DEBUG(0, ("Failed to fork LSASD [%s], aborting ...\n",
872 /* parent or error */
875 /* Re-enable SIGHUP before returnig */
876 BlockSignals(false, SIGTERM);
877 BlockSignals(false, SIGHUP);
882 status = reinit_after_fork(msg_ctx,
885 if (!NT_STATUS_IS_OK(status)) {
886 DEBUG(0,("reinit_after_fork() failed\n"));
887 smb_panic("reinit_after_fork() failed");
890 /* save the parent process id so the children can use it later */
891 parent_id = messaging_server_id(msg_ctx);
893 lsasd_reopen_logs(0);
894 pfh_daemon_config(DAEMON_NAME,
896 &default_pf_lsasd_cfg);
898 lsasd_setup_sig_term_handler(ev_ctx);
899 lsasd_setup_sig_hup_handler(ev_ctx);
901 BlockSignals(false, SIGTERM);
902 BlockSignals(false, SIGHUP);
904 ok = lsasd_create_sockets(ev_ctx, msg_ctx, listen_fd, &listen_fd_size);
909 /* start children before any more initialization is done */
910 ok = prefork_create_pool(ev_ctx, /* mem_ctx */
915 pf_lsasd_cfg.min_children,
916 pf_lsasd_cfg.max_children,
917 &lsasd_children_main,
924 if (!serverid_register(messaging_server_id(msg_ctx),
929 messaging_register(msg_ctx,
931 MSG_SMB_CONF_UPDATED,
932 lsasd_smb_conf_updated);
933 messaging_register(msg_ctx, ev_ctx,
934 MSG_PREFORK_CHILD_EVENT, child_ping);
936 status = rpc_lsarpc_init(NULL);
937 if (!NT_STATUS_IS_OK(status)) {
938 DEBUG(0, ("Failed to register lsarpc rpc inteface in lsasd! (%s)\n",
943 status = rpc_samr_init(NULL);
944 if (!NT_STATUS_IS_OK(status)) {
945 DEBUG(0, ("Failed to register samr rpc inteface in lsasd! (%s)\n",
950 status = rpc_netlogon_init(NULL);
951 if (!NT_STATUS_IS_OK(status)) {
952 DEBUG(0, ("Failed to register netlogon rpc inteface in lsasd! (%s)\n",
957 ok = lsasd_setup_children_monitor(ev_ctx, msg_ctx);
959 DEBUG(0, ("Failed to setup children monitoring!\n"));
963 DEBUG(1, ("LSASD Daemon Started (%d)\n", getpid()));
966 rc = tevent_loop_wait(ev_ctx);
968 /* should not be reached */
969 DEBUG(0,("lsasd: tevent_loop_wait() exited with %d - %s\n",
970 rc, (rc == 0) ? "out of events" : strerror(errno)));