2 Unix SMB/Netbios implementation.
4 Copyright (C) Simo Sorce <idra@samba.org> 2010-2011
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "smbd/smbd.h"
23 #include "include/printing.h"
24 #include "printing/nt_printing_migrate_internal.h"
25 #include "printing/queue_process.h"
26 #include "printing/pcap.h"
27 #include "printing/load.h"
29 #include "librpc/gen_ndr/srv_winreg.h"
30 #include "librpc/gen_ndr/srv_spoolss.h"
31 #include "rpc_server/rpc_server.h"
32 #include "rpc_server/rpc_ep_register.h"
33 #include "rpc_server/rpc_config.h"
34 #include "rpc_server/spoolss/srv_spoolss_nt.h"
35 #include "librpc/rpc/dcerpc_ep.h"
36 #include "lib/server_prefork.h"
37 #include "lib/server_prefork_util.h"
39 #define SPOOLSS_PIPE_NAME "spoolss"
40 #define DAEMON_NAME "spoolssd"
42 static struct server_id parent_id
;
43 static struct prefork_pool
*spoolss_pool
= NULL
;
44 static int spoolss_child_id
= 0;
46 static struct pf_daemon_config default_pf_spoolss_cfg
= {
47 .prefork_status
= PFH_INIT
,
51 .max_allowed_clients
= 100,
52 .child_min_life
= 60 /* 1 minute minimum life time */
54 static struct pf_daemon_config pf_spoolss_cfg
= { 0 };
56 pid_t
start_spoolssd(struct tevent_context
*ev_ctx
,
57 struct messaging_context
*msg_ctx
);
59 static void spoolss_reopen_logs(int child_id
)
61 char *lfile
= lp_logfile(talloc_tos());
66 rc
= asprintf(&ext
, "%s.%d", DAEMON_NAME
, child_id
);
68 rc
= asprintf(&ext
, "%s", DAEMON_NAME
);
76 if (lfile
== NULL
|| lfile
[0] == '\0') {
77 rc
= asprintf(&lfile
, "%s/log.%s",
78 get_dyn_LOGFILEBASE(), ext
);
80 if (strstr(lfile
, ext
) == NULL
) {
82 rc
= asprintf(&lfile
, "%s.%d",
83 lp_logfile(talloc_tos()),
86 rc
= asprintf(&lfile
, "%s.%s",
87 lp_logfile(talloc_tos()),
94 lp_set_logfile(lfile
);
103 static void update_conf(struct tevent_context
*ev
,
104 struct messaging_context
*msg
)
106 change_to_root_user();
107 lp_load_global(get_dyn_CONFIGFILE());
108 load_printers(ev
, msg
);
110 spoolss_reopen_logs(spoolss_child_id
);
111 if (spoolss_child_id
== 0) {
112 pfh_daemon_config(DAEMON_NAME
,
114 &default_pf_spoolss_cfg
);
115 pfh_manage_pool(ev
, msg
, &pf_spoolss_cfg
, spoolss_pool
);
119 static void smb_conf_updated(struct messaging_context
*msg
,
122 struct server_id server_id
,
125 struct tevent_context
*ev_ctx
= talloc_get_type_abort(private_data
,
126 struct tevent_context
);
128 DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
129 update_conf(ev_ctx
, msg
);
132 static void spoolss_sig_term_handler(struct tevent_context
*ev
,
133 struct tevent_signal
*se
,
139 exit_server_cleanly("termination signal");
142 static void spoolss_setup_sig_term_handler(struct tevent_context
*ev_ctx
)
144 struct tevent_signal
*se
;
146 se
= tevent_add_signal(ev_ctx
,
149 spoolss_sig_term_handler
,
152 exit_server("failed to setup SIGTERM handler");
156 static void spoolss_sig_hup_handler(struct tevent_context
*ev
,
157 struct tevent_signal
*se
,
163 struct messaging_context
*msg_ctx
;
165 msg_ctx
= talloc_get_type_abort(pvt
, struct messaging_context
);
167 DEBUG(1,("Reloading printers after SIGHUP\n"));
168 update_conf(ev
, msg_ctx
);
170 /* relay to all children */
172 prefork_send_signal_to_all(spoolss_pool
, SIGHUP
);
176 static void spoolss_setup_sig_hup_handler(struct tevent_context
*ev_ctx
,
177 struct messaging_context
*msg_ctx
)
179 struct tevent_signal
*se
;
181 se
= tevent_add_signal(ev_ctx
,
184 spoolss_sig_hup_handler
,
187 exit_server("failed to setup SIGHUP handler");
191 static bool spoolss_init_cb(void *ptr
)
193 struct messaging_context
*msg_ctx
= talloc_get_type_abort(
194 ptr
, struct messaging_context
);
196 return nt_printing_tdb_migrate(msg_ctx
);
199 static bool spoolss_shutdown_cb(void *ptr
)
201 srv_spoolss_cleanup();
208 static void spoolss_chld_sig_hup_handler(struct tevent_context
*ev
,
209 struct tevent_signal
*se
,
215 struct messaging_context
*msg_ctx
;
217 msg_ctx
= talloc_get_type_abort(pvt
, struct messaging_context
);
219 change_to_root_user();
220 DEBUG(1,("Reloading printers after SIGHUP\n"));
221 load_printers(ev
, msg_ctx
);
222 spoolss_reopen_logs(spoolss_child_id
);
225 static bool spoolss_setup_chld_hup_handler(struct tevent_context
*ev_ctx
,
226 struct messaging_context
*msg_ctx
,
227 struct pf_worker_data
*pf
)
229 struct tevent_signal
*se
;
231 se
= tevent_add_signal(ev_ctx
,
234 spoolss_chld_sig_hup_handler
,
237 DEBUG(1, ("failed to setup SIGHUP handler"));
244 static void parent_ping(struct messaging_context
*msg_ctx
,
247 struct server_id server_id
,
251 /* The fact we received this message is enough to let make the event
252 * loop if it was idle. spoolss_children_main will cycle through
253 * spoolss_next_client at least once. That function will take whatever
254 * action is necessary */
256 DEBUG(10, ("Got message that the parent changed status.\n"));
260 static bool spoolss_child_init(struct tevent_context
*ev_ctx
,
261 int child_id
, struct pf_worker_data
*pf
)
264 struct rpc_srv_callbacks spoolss_cb
;
265 struct messaging_context
*msg_ctx
= server_messaging_context();
268 status
= reinit_after_fork(msg_ctx
, ev_ctx
, true, "spoolssd-child");
269 if (!NT_STATUS_IS_OK(status
)) {
270 DEBUG(0,("reinit_after_fork() failed\n"));
271 smb_panic("reinit_after_fork() failed");
274 spoolss_child_id
= child_id
;
275 spoolss_reopen_logs(child_id
);
277 ok
= spoolss_setup_chld_hup_handler(ev_ctx
, msg_ctx
, pf
);
282 if (!locking_init()) {
286 messaging_register(msg_ctx
, ev_ctx
,
287 MSG_SMB_CONF_UPDATED
, smb_conf_updated
);
288 messaging_register(msg_ctx
, ev_ctx
,
289 MSG_PREFORK_PARENT_EVENT
, parent_ping
);
291 /* As soon as messaging is up check if pcap has been loaded already.
292 * If so then we probably missed a message and should load_printers()
293 * ourselves. If pcap has not been loaded yet, then ignore, we will get
294 * a message as soon as the bq process completes the reload. */
295 if (pcap_cache_loaded(NULL
)) {
296 load_printers(ev_ctx
, msg_ctx
);
299 /* try to reinit rpc queues */
300 spoolss_cb
.init
= spoolss_init_cb
;
301 spoolss_cb
.shutdown
= spoolss_shutdown_cb
;
302 spoolss_cb
.private_data
= msg_ctx
;
304 status
= rpc_winreg_init(NULL
);
305 if (!NT_STATUS_IS_OK(status
)) {
306 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
311 status
= rpc_spoolss_init(&spoolss_cb
);
312 if (!NT_STATUS_IS_OK(status
)) {
313 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
321 struct spoolss_children_data
{
322 struct tevent_context
*ev_ctx
;
323 struct messaging_context
*msg_ctx
;
324 struct pf_worker_data
*pf
;
329 static void spoolss_next_client(void *pvt
);
331 static int spoolss_children_main(struct tevent_context
*ev_ctx
,
332 struct messaging_context
*msg_ctx
,
333 struct pf_worker_data
*pf
,
339 struct spoolss_children_data
*data
;
343 ok
= spoolss_child_init(ev_ctx
, child_id
, pf
);
348 data
= talloc(ev_ctx
, struct spoolss_children_data
);
353 data
->ev_ctx
= ev_ctx
;
354 data
->msg_ctx
= msg_ctx
;
355 data
->listen_fd_size
= listen_fd_size
;
356 data
->listen_fds
= listen_fds
;
358 /* loop until it is time to exit */
359 while (pf
->status
!= PF_WORKER_EXITING
) {
360 /* try to see if it is time to schedule the next client */
361 spoolss_next_client(data
);
363 ret
= tevent_loop_once(ev_ctx
);
365 DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
366 ret
, strerror(errno
)));
367 pf
->status
= PF_WORKER_EXITING
;
374 static void spoolss_client_terminated(void *pvt
)
376 struct spoolss_children_data
*data
;
378 data
= talloc_get_type_abort(pvt
, struct spoolss_children_data
);
380 pfh_client_terminated(data
->pf
);
382 spoolss_next_client(pvt
);
385 struct spoolss_new_client
{
386 struct spoolss_children_data
*data
;
387 struct tsocket_address
*srv_addr
;
388 struct tsocket_address
*cli_addr
;
391 static void spoolss_handle_client(struct tevent_req
*req
);
393 static void spoolss_next_client(void *pvt
)
395 struct tevent_req
*req
;
396 struct spoolss_children_data
*data
;
397 struct spoolss_new_client
*next
;
399 data
= talloc_get_type_abort(pvt
, struct spoolss_children_data
);
401 if (!pfh_child_allowed_to_accept(data
->pf
)) {
402 /* nothing to do for now we are already listening
403 * or we are not allowed to listen further */
407 next
= talloc_zero(data
, struct spoolss_new_client
);
409 DEBUG(1, ("Out of memory!?\n"));
414 req
= prefork_listen_send(next
, data
->ev_ctx
, data
->pf
,
415 data
->listen_fd_size
,
418 DEBUG(1, ("Failed to make listening request!?\n"));
422 tevent_req_set_callback(req
, spoolss_handle_client
, next
);
425 static void spoolss_handle_client(struct tevent_req
*req
)
427 struct spoolss_children_data
*data
;
428 struct spoolss_new_client
*client
;
429 const DATA_BLOB ping
= data_blob_null
;
433 client
= tevent_req_callback_data(req
, struct spoolss_new_client
);
436 ret
= prefork_listen_recv(req
, client
, &sd
,
437 &client
->srv_addr
, &client
->cli_addr
);
439 /* this will free the request too */
443 DEBUG(6, ("No client connection was available after all!\n"));
447 /* Warn parent that our status changed */
448 messaging_send(data
->msg_ctx
, parent_id
,
449 MSG_PREFORK_CHILD_EVENT
, &ping
);
451 DEBUG(2, ("Spoolss preforked child %d got client connection!\n",
452 (int)(data
->pf
->pid
)));
454 named_pipe_accept_function(data
->ev_ctx
, data
->msg_ctx
,
455 SPOOLSS_PIPE_NAME
, sd
,
456 spoolss_client_terminated
, data
);
459 /* ==== Main Process Functions ==== */
461 extern pid_t background_lpq_updater_pid
;
462 static char *bq_logfile
;
464 static void check_updater_child(struct tevent_context
*ev_ctx
,
465 struct messaging_context
*msg_ctx
)
470 if (background_lpq_updater_pid
== -1) {
474 pid
= waitpid(background_lpq_updater_pid
, &status
, WNOHANG
);
476 DEBUG(2, ("The background queue child died... Restarting!\n"));
477 pid
= start_background_queue(ev_ctx
, msg_ctx
, bq_logfile
);
478 background_lpq_updater_pid
= pid
;
482 static void child_ping(struct messaging_context
*msg_ctx
,
485 struct server_id server_id
,
488 struct tevent_context
*ev_ctx
;
490 ev_ctx
= talloc_get_type_abort(private_data
, struct tevent_context
);
492 DEBUG(10, ("Got message that a child changed status.\n"));
493 pfh_manage_pool(ev_ctx
, msg_ctx
, &pf_spoolss_cfg
, spoolss_pool
);
496 static bool spoolssd_schedule_check(struct tevent_context
*ev_ctx
,
497 struct messaging_context
*msg_ctx
,
498 struct timeval current_time
);
499 static void spoolssd_check_children(struct tevent_context
*ev_ctx
,
500 struct tevent_timer
*te
,
501 struct timeval current_time
,
504 static void spoolssd_sigchld_handler(struct tevent_context
*ev_ctx
,
505 struct prefork_pool
*pfp
,
508 struct messaging_context
*msg_ctx
;
510 msg_ctx
= talloc_get_type_abort(pvt
, struct messaging_context
);
512 /* run pool management so we can fork/retire or increase
513 * the allowed connections per child based on load */
514 pfh_manage_pool(ev_ctx
, msg_ctx
, &pf_spoolss_cfg
, spoolss_pool
);
516 /* also check if the updater child is alive and well */
517 check_updater_child(ev_ctx
, msg_ctx
);
520 static bool spoolssd_setup_children_monitor(struct tevent_context
*ev_ctx
,
521 struct messaging_context
*msg_ctx
)
525 /* add our oun sigchld callback */
526 prefork_set_sigchld_callback(spoolss_pool
,
527 spoolssd_sigchld_handler
, msg_ctx
);
529 ok
= spoolssd_schedule_check(ev_ctx
, msg_ctx
,
530 tevent_timeval_current());
534 static bool spoolssd_schedule_check(struct tevent_context
*ev_ctx
,
535 struct messaging_context
*msg_ctx
,
536 struct timeval current_time
)
538 struct tevent_timer
*te
;
539 struct timeval next_event
;
541 /* check situation again in 10 seconds */
542 next_event
= tevent_timeval_current_ofs(10, 0);
544 /* TODO: check when the socket becomes readable, so that children
545 * are checked only when there is some activity ? */
546 te
= tevent_add_timer(ev_ctx
, spoolss_pool
, next_event
,
547 spoolssd_check_children
, msg_ctx
);
549 DEBUG(2, ("Failed to set up children monitoring!\n"));
556 static void spoolssd_check_children(struct tevent_context
*ev_ctx
,
557 struct tevent_timer
*te
,
558 struct timeval current_time
,
561 struct messaging_context
*msg_ctx
;
563 msg_ctx
= talloc_get_type_abort(pvt
, struct messaging_context
);
565 pfh_manage_pool(ev_ctx
, msg_ctx
, &pf_spoolss_cfg
, spoolss_pool
);
567 spoolssd_schedule_check(ev_ctx
, msg_ctx
, current_time
);
570 static void print_queue_forward(struct messaging_context
*msg
,
573 struct server_id server_id
,
576 messaging_send_buf(msg
, pid_to_procid(background_lpq_updater_pid
),
577 MSG_PRINTER_UPDATE
, data
->data
, data
->length
);
580 static char *get_bq_logfile(void)
582 char *lfile
= lp_logfile(talloc_tos());
585 if (lfile
== NULL
|| lfile
[0] == '\0') {
586 rc
= asprintf(&lfile
, "%s/log.%s.bq",
587 get_dyn_LOGFILEBASE(), DAEMON_NAME
);
589 rc
= asprintf(&lfile
, "%s.bq", lp_logfile(talloc_tos()));
597 pid_t
start_spoolssd(struct tevent_context
*ev_ctx
,
598 struct messaging_context
*msg_ctx
)
600 enum rpc_service_mode_e epm_mode
= rpc_epmapper_mode();
601 struct rpc_srv_callbacks spoolss_cb
;
602 struct dcerpc_binding_vector
*v
;
610 DEBUG(1, ("Forking SPOOLSS Daemon\n"));
613 * Block signals before forking child as it will have to
614 * set its own handlers. Child will re-enable SIGHUP as
615 * soon as the handlers are set up.
617 BlockSignals(true, SIGTERM
);
618 BlockSignals(true, SIGHUP
);
623 DEBUG(0, ("Failed to fork SPOOLSS [%s]\n",
627 /* parent or error */
630 /* Re-enable SIGHUP before returnig */
631 BlockSignals(false, SIGTERM
);
632 BlockSignals(false, SIGHUP
);
636 status
= smbd_reinit_after_fork(msg_ctx
, ev_ctx
, true,
638 if (!NT_STATUS_IS_OK(status
)) {
639 DEBUG(0,("reinit_after_fork() failed\n"));
640 smb_panic("reinit_after_fork() failed");
643 /* save the parent process id so the children can use it later */
644 parent_id
= messaging_server_id(msg_ctx
);
646 spoolss_reopen_logs(0);
647 pfh_daemon_config(DAEMON_NAME
,
649 &default_pf_spoolss_cfg
);
651 spoolss_setup_sig_term_handler(ev_ctx
);
652 spoolss_setup_sig_hup_handler(ev_ctx
, msg_ctx
);
654 BlockSignals(false, SIGTERM
);
655 BlockSignals(false, SIGHUP
);
657 /* always start the backgroundqueue listner in spoolssd */
658 bq_logfile
= get_bq_logfile();
659 pid
= start_background_queue(ev_ctx
, msg_ctx
, bq_logfile
);
661 background_lpq_updater_pid
= pid
;
664 /* the listening fd must be created before the children are actually
666 listen_fd
= create_named_pipe_socket(SPOOLSS_PIPE_NAME
);
667 if (listen_fd
== -1) {
671 ret
= listen(listen_fd
, pf_spoolss_cfg
.max_allowed_clients
);
673 DEBUG(0, ("Failed to listen on spoolss pipe - %s\n",
678 /* start children before any more initialization is done */
679 ok
= prefork_create_pool(ev_ctx
, /* mem_ctx */
682 pf_spoolss_cfg
.min_children
,
683 pf_spoolss_cfg
.max_children
,
684 &spoolss_children_main
, NULL
,
690 if (!locking_init()) {
694 messaging_register(msg_ctx
, ev_ctx
,
695 MSG_SMB_CONF_UPDATED
, smb_conf_updated
);
696 messaging_register(msg_ctx
, NULL
, MSG_PRINTER_UPDATE
,
697 print_queue_forward
);
698 messaging_register(msg_ctx
, ev_ctx
,
699 MSG_PREFORK_CHILD_EVENT
, child_ping
);
702 * As soon as messaging is up check if pcap has been loaded already.
703 * If pcap has not been loaded yet, then ignore, as we will reload on
704 * client enumeration anyway.
706 if (pcap_cache_loaded(NULL
)) {
707 load_printers(ev_ctx
, msg_ctx
);
710 mem_ctx
= talloc_new(NULL
);
711 if (mem_ctx
== NULL
) {
716 * Initialize spoolss with an init function to convert printers first.
717 * static_init_rpc will try to initialize the spoolss server too but you
718 * can't register it twice.
720 spoolss_cb
.init
= spoolss_init_cb
;
721 spoolss_cb
.shutdown
= spoolss_shutdown_cb
;
722 spoolss_cb
.private_data
= msg_ctx
;
724 status
= rpc_winreg_init(NULL
);
725 if (!NT_STATUS_IS_OK(status
)) {
726 DEBUG(0, ("Failed to register winreg rpc interface! (%s)\n",
731 status
= rpc_spoolss_init(&spoolss_cb
);
732 if (!NT_STATUS_IS_OK(status
)) {
733 DEBUG(0, ("Failed to register spoolss rpc interface! (%s)\n",
738 if (epm_mode
!= RPC_SERVICE_MODE_DISABLED
&&
739 (lp_parm_bool(-1, "rpc_server", "register_embedded_np", false))) {
740 status
= dcerpc_binding_vector_new(mem_ctx
, &v
);
741 if (!NT_STATUS_IS_OK(status
)) {
742 DEBUG(0, ("Failed to create binding vector (%s)\n",
747 status
= dcerpc_binding_vector_add_np_default(&ndr_table_spoolss
, v
);
748 if (!NT_STATUS_IS_OK(status
)) {
749 DEBUG(0, ("Failed to add np to binding vector (%s)\n",
754 status
= rpc_ep_register(ev_ctx
, msg_ctx
, &ndr_table_spoolss
, v
);
755 if (!NT_STATUS_IS_OK(status
)) {
756 DEBUG(0, ("Failed to register spoolss endpoint! (%s)\n",
762 talloc_free(mem_ctx
);
764 ok
= spoolssd_setup_children_monitor(ev_ctx
, msg_ctx
);
766 DEBUG(0, ("Failed to setup children monitoring!\n"));
770 DEBUG(1, ("SPOOLSS Daemon Started (%u)\n", (unsigned int)getpid()));
772 pfh_manage_pool(ev_ctx
, msg_ctx
, &pf_spoolss_cfg
, spoolss_pool
);
775 ret
= tevent_loop_wait(ev_ctx
);
777 /* should not be reached */
778 DEBUG(0,("spoolssd tevent_loop_wait() exited with %d - %s\n",
779 ret
, (ret
== 0) ? "out of events" : strerror(errno
)));