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/tsocket/tsocket.h"
28 #include "lib/server_prefork.h"
29 #include "lib/server_prefork_util.h"
30 #include "librpc/rpc/dcerpc_ep.h"
32 #include "rpc_server/rpc_server.h"
33 #include "rpc_server/rpc_ep_register.h"
34 #include "rpc_server/rpc_sock_helper.h"
36 #include "librpc/gen_ndr/srv_lsa.h"
37 #include "librpc/gen_ndr/srv_samr.h"
38 #include "librpc/gen_ndr/srv_netlogon.h"
40 #define DAEMON_NAME "lsasd"
41 #define LSASD_MAX_SOCKETS 64
43 static struct server_id parent_id
;
44 static struct prefork_pool
*lsasd_pool
= NULL
;
45 static int lsasd_child_id
= 0;
47 static struct pf_daemon_config default_pf_lsasd_cfg
= {
48 .prefork_status
= PFH_INIT
,
52 .max_allowed_clients
= 100,
53 .child_min_life
= 60 /* 1 minute minimum life time */
55 static struct pf_daemon_config pf_lsasd_cfg
= { 0 };
57 void start_lsasd(struct tevent_context
*ev_ctx
,
58 struct messaging_context
*msg_ctx
);
60 static void lsasd_reopen_logs(int child_id
)
62 char *lfile
= lp_logfile();
67 rc
= asprintf(&extension
, "%s.%d", DAEMON_NAME
, child_id
);
69 rc
= asprintf(&extension
, "%s", DAEMON_NAME
);
76 if (lfile
== NULL
|| lfile
[0] == '\0') {
77 rc
= asprintf(&lfile
, "%s/log.%s",
78 get_dyn_LOGFILEBASE(), extension
);
80 if (strstr(lfile
, extension
) == NULL
) {
82 rc
= asprintf(&lfile
, "%s.%d",
86 rc
= asprintf(&lfile
, "%s.%s",
94 lp_set_logfile(lfile
);
103 static void lsasd_smb_conf_updated(struct messaging_context
*msg
,
106 struct server_id server_id
,
109 struct tevent_context
*ev_ctx
;
111 DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
112 ev_ctx
= talloc_get_type_abort(private_data
, struct tevent_context
);
114 change_to_root_user();
115 lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
117 lsasd_reopen_logs(lsasd_child_id
);
118 if (lsasd_child_id
== 0) {
119 pfh_daemon_config(DAEMON_NAME
,
121 &default_pf_lsasd_cfg
);
122 pfh_manage_pool(ev_ctx
, msg
, &pf_lsasd_cfg
, lsasd_pool
);
126 static void lsasd_sig_term_handler(struct tevent_context
*ev
,
127 struct tevent_signal
*se
,
133 rpc_netlogon_shutdown();
135 rpc_lsarpc_shutdown();
137 DEBUG(0, ("termination signal\n"));
141 static void lsasd_setup_sig_term_handler(struct tevent_context
*ev_ctx
)
143 struct tevent_signal
*se
;
145 se
= tevent_add_signal(ev_ctx
,
148 lsasd_sig_term_handler
,
151 DEBUG(0, ("failed to setup SIGTERM handler\n"));
156 static void lsasd_sig_hup_handler(struct tevent_context
*ev
,
157 struct tevent_signal
*se
,
164 change_to_root_user();
165 lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
167 lsasd_reopen_logs(lsasd_child_id
);
168 pfh_daemon_config(DAEMON_NAME
,
170 &default_pf_lsasd_cfg
);
172 /* relay to all children */
173 prefork_send_signal_to_all(lsasd_pool
, SIGHUP
);
176 static void lsasd_setup_sig_hup_handler(struct tevent_context
*ev_ctx
)
178 struct tevent_signal
*se
;
180 se
= tevent_add_signal(ev_ctx
,
183 lsasd_sig_hup_handler
,
186 DEBUG(0, ("failed to setup SIGHUP handler\n"));
191 /**********************************************************
193 **********************************************************/
195 static void lsasd_chld_sig_hup_handler(struct tevent_context
*ev
,
196 struct tevent_signal
*se
,
202 change_to_root_user();
203 lsasd_reopen_logs(lsasd_child_id
);
206 static bool lsasd_setup_chld_hup_handler(struct tevent_context
*ev_ctx
)
208 struct tevent_signal
*se
;
210 se
= tevent_add_signal(ev_ctx
,
213 lsasd_chld_sig_hup_handler
,
216 DEBUG(1, ("failed to setup SIGHUP handler"));
223 static void parent_ping(struct messaging_context
*msg_ctx
,
226 struct server_id server_id
,
230 /* The fact we received this message is enough to let make the event
231 * loop if it was idle. lsasd_children_main will cycle through
232 * lsasd_next_client at least once. That function will take whatever
233 * action is necessary */
235 DEBUG(10, ("Got message that the parent changed status.\n"));
239 static bool lsasd_child_init(struct tevent_context
*ev_ctx
,
241 struct pf_worker_data
*pf
)
244 struct messaging_context
*msg_ctx
= server_messaging_context();
247 status
= reinit_after_fork(msg_ctx
, ev_ctx
,
248 procid_self(), true);
249 if (!NT_STATUS_IS_OK(status
)) {
250 DEBUG(0,("reinit_after_fork() failed\n"));
251 smb_panic("reinit_after_fork() failed");
254 lsasd_child_id
= child_id
;
255 lsasd_reopen_logs(child_id
);
257 ok
= lsasd_setup_chld_hup_handler(ev_ctx
);
262 if (!serverid_register(procid_self(), FLAG_MSG_GENERAL
)) {
266 messaging_register(msg_ctx
, ev_ctx
,
267 MSG_SMB_CONF_UPDATED
, lsasd_smb_conf_updated
);
268 messaging_register(msg_ctx
, ev_ctx
,
269 MSG_PREFORK_PARENT_EVENT
, parent_ping
);
271 status
= rpc_lsarpc_init(NULL
);
272 if (!NT_STATUS_IS_OK(status
)) {
273 DEBUG(0, ("Failed to register lsarpc rpc inteface! (%s)\n",
278 status
= rpc_samr_init(NULL
);
279 if (!NT_STATUS_IS_OK(status
)) {
280 DEBUG(0, ("Failed to register samr rpc inteface! (%s)\n",
285 status
= rpc_netlogon_init(NULL
);
286 if (!NT_STATUS_IS_OK(status
)) {
287 DEBUG(0, ("Failed to register netlogon rpc inteface! (%s)\n",
295 struct lsasd_children_data
{
296 struct tevent_context
*ev_ctx
;
297 struct messaging_context
*msg_ctx
;
298 struct pf_worker_data
*pf
;
303 static void lsasd_next_client(void *pvt
);
305 static int lsasd_children_main(struct tevent_context
*ev_ctx
,
306 struct messaging_context
*msg_ctx
,
307 struct pf_worker_data
*pf
,
313 struct lsasd_children_data
*data
;
317 ok
= lsasd_child_init(ev_ctx
, child_id
, pf
);
322 data
= talloc(ev_ctx
, struct lsasd_children_data
);
327 data
->ev_ctx
= ev_ctx
;
328 data
->msg_ctx
= msg_ctx
;
329 data
->listen_fd_size
= listen_fd_size
;
330 data
->listen_fds
= listen_fds
;
332 /* loop until it is time to exit */
333 while (pf
->status
!= PF_WORKER_EXITING
) {
334 /* try to see if it is time to schedule the next client */
335 lsasd_next_client(data
);
337 ret
= tevent_loop_once(ev_ctx
);
339 DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
340 ret
, strerror(errno
)));
341 pf
->status
= PF_WORKER_EXITING
;
348 static void lsasd_client_terminated(void *pvt
)
350 struct lsasd_children_data
*data
;
352 data
= talloc_get_type_abort(pvt
, struct lsasd_children_data
);
354 pfh_client_terminated(data
->pf
);
356 lsasd_next_client(pvt
);
359 struct lsasd_new_client
{
360 struct lsasd_children_data
*data
;
363 static void lsasd_handle_client(struct tevent_req
*req
);
365 static void lsasd_next_client(void *pvt
)
367 struct tevent_req
*req
;
368 struct lsasd_children_data
*data
;
369 struct lsasd_new_client
*next
;
371 data
= talloc_get_type_abort(pvt
, struct lsasd_children_data
);
373 if (!pfh_child_allowed_to_accept(data
->pf
)) {
374 /* nothing to do for now we are already listening
375 * or we are not allowed to listen further */
379 next
= talloc_zero(data
, struct lsasd_new_client
);
381 DEBUG(1, ("Out of memory!?\n"));
386 req
= prefork_listen_send(next
,
389 data
->listen_fd_size
,
392 DEBUG(1, ("Failed to make listening request!?\n"));
396 tevent_req_set_callback(req
, lsasd_handle_client
, next
);
399 static void lsasd_handle_client(struct tevent_req
*req
)
401 struct lsasd_children_data
*data
;
402 struct lsasd_new_client
*client
;
403 const DATA_BLOB ping
= data_blob_null
;
407 struct tsocket_address
*srv_addr
;
408 struct tsocket_address
*cli_addr
;
410 client
= tevent_req_callback_data(req
, struct lsasd_new_client
);
413 tmp_ctx
= talloc_stackframe();
414 if (tmp_ctx
== NULL
) {
415 DEBUG(1, ("Failed to allocate stackframe!\n"));
419 rc
= prefork_listen_recv(req
,
425 /* this will free the request too */
429 DEBUG(6, ("No client connection was available after all!\n"));
433 /* Warn parent that our status changed */
434 messaging_send(data
->msg_ctx
, parent_id
,
435 MSG_PREFORK_CHILD_EVENT
, &ping
);
437 DEBUG(2, ("LSASD preforked child %d got client connection!\n",
438 (int)(data
->pf
->pid
)));
440 if (tsocket_address_is_inet(srv_addr
, "ip")) {
441 DEBUG(3, ("Got a tcpip client connection from %s on inteface %s\n",
442 tsocket_address_string(cli_addr
, tmp_ctx
),
443 tsocket_address_string(srv_addr
, tmp_ctx
)));
445 dcerpc_ncacn_accept(data
->ev_ctx
,
453 } else if (tsocket_address_is_unix(srv_addr
)) {
456 p
= tsocket_address_unix_path(srv_addr
, tmp_ctx
);
458 talloc_free(tmp_ctx
);
462 if (strstr(p
, "/np/")) {
465 named_pipe_accept_function(data
->ev_ctx
,
469 lsasd_client_terminated
,
474 dcerpc_ncacn_accept(data
->ev_ctx
,
484 DEBUG(0, ("ERROR: Unsupported socket!\n"));
488 talloc_free(tmp_ctx
);
495 static void child_ping(struct messaging_context
*msg_ctx
,
498 struct server_id server_id
,
501 struct tevent_context
*ev_ctx
;
503 ev_ctx
= talloc_get_type_abort(private_data
, struct tevent_context
);
505 DEBUG(10, ("Got message that a child changed status.\n"));
506 pfh_manage_pool(ev_ctx
, msg_ctx
, &pf_lsasd_cfg
, lsasd_pool
);
509 static bool lsasd_schedule_check(struct tevent_context
*ev_ctx
,
510 struct messaging_context
*msg_ctx
,
511 struct timeval current_time
);
513 static void lsasd_check_children(struct tevent_context
*ev_ctx
,
514 struct tevent_timer
*te
,
515 struct timeval current_time
,
518 static void lsasd_sigchld_handler(struct tevent_context
*ev_ctx
,
519 struct prefork_pool
*pfp
,
522 struct messaging_context
*msg_ctx
;
524 msg_ctx
= talloc_get_type_abort(pvt
, struct messaging_context
);
526 /* run pool management so we can fork/retire or increase
527 * the allowed connections per child based on load */
528 pfh_manage_pool(ev_ctx
, msg_ctx
, &pf_lsasd_cfg
, lsasd_pool
);
531 static bool lsasd_setup_children_monitor(struct tevent_context
*ev_ctx
,
532 struct messaging_context
*msg_ctx
)
536 /* add our oun sigchld callback */
537 prefork_set_sigchld_callback(lsasd_pool
, lsasd_sigchld_handler
, msg_ctx
);
539 ok
= lsasd_schedule_check(ev_ctx
, msg_ctx
, tevent_timeval_current());
544 static bool lsasd_schedule_check(struct tevent_context
*ev_ctx
,
545 struct messaging_context
*msg_ctx
,
546 struct timeval current_time
)
548 struct tevent_timer
*te
;
549 struct timeval next_event
;
551 /* check situation again in 10 seconds */
552 next_event
= tevent_timeval_current_ofs(10, 0);
554 /* TODO: check when the socket becomes readable, so that children
555 * are checked only when there is some activity ? */
556 te
= tevent_add_timer(ev_ctx
, lsasd_pool
, next_event
,
557 lsasd_check_children
, msg_ctx
);
559 DEBUG(2, ("Failed to set up children monitoring!\n"));
566 static void lsasd_check_children(struct tevent_context
*ev_ctx
,
567 struct tevent_timer
*te
,
568 struct timeval current_time
,
571 struct messaging_context
*msg_ctx
;
573 msg_ctx
= talloc_get_type_abort(pvt
, struct messaging_context
);
575 pfh_manage_pool(ev_ctx
, msg_ctx
, &pf_lsasd_cfg
, lsasd_pool
);
577 lsasd_schedule_check(ev_ctx
, msg_ctx
, current_time
);
584 static bool lsasd_create_sockets(struct tevent_context
*ev_ctx
,
585 struct messaging_context
*msg_ctx
,
589 struct dcerpc_binding_vector
*v
, *v_orig
;
597 tmp_ctx
= talloc_stackframe();
598 if (tmp_ctx
== NULL
) {
602 status
= dcerpc_binding_vector_new(tmp_ctx
, &v_orig
);
603 if (!NT_STATUS_IS_OK(status
)) {
608 /* Create only one tcpip listener for all services */
609 status
= rpc_create_tcpip_sockets(&ndr_table_lsarpc
,
614 if (!NT_STATUS_IS_OK(status
)) {
619 /* Start to listen on tcpip sockets */
620 for (i
= 0; i
< *listen_fd_size
; i
++) {
621 rc
= listen(listen_fd
[i
], pf_lsasd_cfg
.max_allowed_clients
);
623 DEBUG(0, ("Failed to listen on tcpip socket - %s\n",
631 fd
= create_named_pipe_socket("lsarpc");
636 listen_fd
[*listen_fd_size
] = fd
;
639 rc
= listen(fd
, pf_lsasd_cfg
.max_allowed_clients
);
641 DEBUG(0, ("Failed to listen on lsarpc pipe - %s\n",
647 fd
= create_named_pipe_socket("lsass");
652 listen_fd
[*listen_fd_size
] = fd
;
655 rc
= listen(fd
, pf_lsasd_cfg
.max_allowed_clients
);
657 DEBUG(0, ("Failed to listen on lsass pipe - %s\n",
663 fd
= create_dcerpc_ncalrpc_socket("lsarpc");
668 listen_fd
[*listen_fd_size
] = fd
;
671 rc
= listen(fd
, pf_lsasd_cfg
.max_allowed_clients
);
673 DEBUG(0, ("Failed to listen on lsarpc ncalrpc - %s\n",
679 v
= dcerpc_binding_vector_dup(tmp_ctx
, v_orig
);
685 status
= dcerpc_binding_vector_replace_iface(&ndr_table_lsarpc
, v
);
686 if (!NT_STATUS_IS_OK(status
)) {
690 status
= dcerpc_binding_vector_add_np_default(&ndr_table_lsarpc
, v
);
691 if (!NT_STATUS_IS_OK(status
)) {
696 status
= dcerpc_binding_vector_add_unix(&ndr_table_lsarpc
, v
, "lsarpc");
697 if (!NT_STATUS_IS_OK(status
)) {
702 status
= rpc_ep_register(ev_ctx
, msg_ctx
, &ndr_table_lsarpc
, v
);
703 if (!NT_STATUS_IS_OK(status
)) {
709 fd
= create_named_pipe_socket("samr");
715 rc
= listen(fd
, pf_lsasd_cfg
.max_allowed_clients
);
717 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
722 listen_fd
[*listen_fd_size
] = fd
;
725 fd
= create_dcerpc_ncalrpc_socket("samr");
730 listen_fd
[*listen_fd_size
] = fd
;
733 rc
= listen(fd
, pf_lsasd_cfg
.max_allowed_clients
);
735 DEBUG(0, ("Failed to listen on samr ncalrpc - %s\n",
741 v
= dcerpc_binding_vector_dup(tmp_ctx
, v_orig
);
747 status
= dcerpc_binding_vector_replace_iface(&ndr_table_samr
, v
);
748 if (!NT_STATUS_IS_OK(status
)) {
752 status
= dcerpc_binding_vector_add_np_default(&ndr_table_samr
, v
);
753 if (!NT_STATUS_IS_OK(status
)) {
758 status
= dcerpc_binding_vector_add_unix(&ndr_table_lsarpc
, v
, "samr");
759 if (!NT_STATUS_IS_OK(status
)) {
764 status
= rpc_ep_register(ev_ctx
, msg_ctx
, &ndr_table_samr
, v
);
765 if (!NT_STATUS_IS_OK(status
)) {
771 fd
= create_named_pipe_socket("netlogon");
777 rc
= listen(fd
, pf_lsasd_cfg
.max_allowed_clients
);
779 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
784 listen_fd
[*listen_fd_size
] = fd
;
787 fd
= create_dcerpc_ncalrpc_socket("netlogon");
792 listen_fd
[*listen_fd_size
] = fd
;
795 rc
= listen(fd
, pf_lsasd_cfg
.max_allowed_clients
);
797 DEBUG(0, ("Failed to listen on netlogon ncalrpc - %s\n",
803 v
= dcerpc_binding_vector_dup(tmp_ctx
, v_orig
);
809 status
= dcerpc_binding_vector_replace_iface(&ndr_table_netlogon
, v
);
810 if (!NT_STATUS_IS_OK(status
)) {
814 status
= dcerpc_binding_vector_add_np_default(&ndr_table_netlogon
, v
);
815 if (!NT_STATUS_IS_OK(status
)) {
820 status
= dcerpc_binding_vector_add_unix(&ndr_table_lsarpc
, v
, "netlogon");
821 if (!NT_STATUS_IS_OK(status
)) {
826 status
= rpc_ep_register(ev_ctx
, msg_ctx
, &ndr_table_netlogon
, v
);
827 if (!NT_STATUS_IS_OK(status
)) {
833 talloc_free(tmp_ctx
);
837 void start_lsasd(struct tevent_context
*ev_ctx
,
838 struct messaging_context
*msg_ctx
)
841 int listen_fd
[LSASD_MAX_SOCKETS
];
842 int listen_fd_size
= 0;
847 DEBUG(1, ("Forking LSA Service Daemon\n"));
850 * Block signals before forking child as it will have to
851 * set its own handlers. Child will re-enable SIGHUP as
852 * soon as the handlers are set up.
854 BlockSignals(true, SIGTERM
);
855 BlockSignals(true, SIGHUP
);
859 DEBUG(0, ("Failed to fork LSASD [%s], aborting ...\n",
864 /* parent or error */
867 /* Re-enable SIGHUP before returnig */
868 BlockSignals(false, SIGTERM
);
869 BlockSignals(false, SIGHUP
);
875 close_low_fds(false);
877 /* save the parent process id so the children can use it later */
878 parent_id
= procid_self();
880 status
= reinit_after_fork(msg_ctx
,
882 procid_self(), true);
883 if (!NT_STATUS_IS_OK(status
)) {
884 DEBUG(0,("reinit_after_fork() failed\n"));
885 smb_panic("reinit_after_fork() failed");
888 lsasd_reopen_logs(0);
889 pfh_daemon_config(DAEMON_NAME
,
891 &default_pf_lsasd_cfg
);
893 lsasd_setup_sig_term_handler(ev_ctx
);
894 lsasd_setup_sig_hup_handler(ev_ctx
);
896 BlockSignals(false, SIGTERM
);
897 BlockSignals(false, SIGHUP
);
899 ok
= lsasd_create_sockets(ev_ctx
, msg_ctx
, listen_fd
, &listen_fd_size
);
904 /* start children before any more initialization is done */
905 ok
= prefork_create_pool(ev_ctx
, /* mem_ctx */
910 pf_lsasd_cfg
.min_children
,
911 pf_lsasd_cfg
.max_children
,
912 &lsasd_children_main
,
919 if (!serverid_register(procid_self(), FLAG_MSG_GENERAL
)) {
923 messaging_register(msg_ctx
,
925 MSG_SMB_CONF_UPDATED
,
926 lsasd_smb_conf_updated
);
927 messaging_register(msg_ctx
, ev_ctx
,
928 MSG_PREFORK_CHILD_EVENT
, child_ping
);
930 status
= rpc_lsarpc_init(NULL
);
931 if (!NT_STATUS_IS_OK(status
)) {
932 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
937 status
= rpc_samr_init(NULL
);
938 if (!NT_STATUS_IS_OK(status
)) {
939 DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
944 status
= rpc_netlogon_init(NULL
);
945 if (!NT_STATUS_IS_OK(status
)) {
946 DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
951 ok
= lsasd_setup_children_monitor(ev_ctx
, msg_ctx
);
953 DEBUG(0, ("Failed to setup children monitoring!\n"));
957 DEBUG(1, ("LSASD Daemon Started (%d)\n", getpid()));
960 rc
= tevent_loop_wait(ev_ctx
);
962 /* should not be reached */
963 DEBUG(0,("lsasd: tevent_loop_wait() exited with %d - %s\n",
964 rc
, (rc
== 0) ? "out of events" : strerror(errno
)));