2 Unix SMB/CIFS implementation.
3 Samba internal messaging functions
4 Copyright (C) 2007 by Volker Lendecke
5 Copyright (C) 2007 by Andrew Tridgell
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #ifdef CLUSTER_SUPPORT
25 #include "librpc/gen_ndr/messaging.h"
26 #include "librpc/gen_ndr/ndr_messaging.h"
28 /* paths to these include files come from --with-ctdb= in configure */
30 #include "ctdb_private.h"
32 struct ctdbd_connection
{
33 struct messaging_context
*msg_ctx
;
37 struct packet_context
*pkt
;
40 void (*release_ip_handler
)(const char *ip_addr
, void *private_data
);
41 void *release_ip_priv
;
44 static NTSTATUS
ctdbd_control(struct ctdbd_connection
*conn
,
45 uint32_t vnn
, uint32 opcode
,
46 uint64_t srvid
, uint32_t flags
, TDB_DATA data
,
47 TALLOC_CTX
*mem_ctx
, TDB_DATA
*outdata
,
51 * exit on fatal communications errors with the ctdbd daemon
53 static void cluster_fatal(const char *why
)
55 DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why
));
56 /* we don't use smb_panic() as we don't want to delay to write
57 a core file. We need to release this process id immediately
58 so that someone else can take over without getting sharing
66 static void ctdb_packet_dump(struct ctdb_req_header
*hdr
)
68 if (DEBUGLEVEL
< 10) {
71 DEBUGADD(10, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
72 (int)hdr
->length
, (int)hdr
->ctdb_magic
,
73 (int)hdr
->ctdb_version
, (int)hdr
->generation
,
74 (int)hdr
->operation
, (int)hdr
->reqid
));
78 * Register a srvid with ctdbd
80 static NTSTATUS
register_with_ctdbd(struct ctdbd_connection
*conn
,
85 return ctdbd_control(conn
, CTDB_CURRENT_NODE
,
86 CTDB_CONTROL_REGISTER_SRVID
, srvid
, 0,
87 tdb_null
, NULL
, NULL
, &cstatus
);
91 * get our vnn from the cluster
93 static NTSTATUS
get_cluster_vnn(struct ctdbd_connection
*conn
, uint32
*vnn
)
97 status
= ctdbd_control(conn
,
98 CTDB_CURRENT_NODE
, CTDB_CONTROL_GET_PNN
, 0, 0,
99 tdb_null
, NULL
, NULL
, &cstatus
);
100 if (!NT_STATUS_IS_OK(status
)) {
101 cluster_fatal("ctdbd_control failed\n");
103 *vnn
= (uint32_t)cstatus
;
107 uint32
ctdbd_vnn(const struct ctdbd_connection
*conn
)
109 return conn
->our_vnn
;
113 * Get us a ctdb connection
116 static NTSTATUS
ctdbd_connect(TALLOC_CTX
*mem_ctx
,
117 struct packet_context
**presult
)
119 struct packet_context
*result
;
120 const char *sockname
= lp_ctdbd_socket();
121 struct sockaddr_un addr
;
124 if (!sockname
|| !*sockname
) {
125 sockname
= CTDB_PATH
;
128 fd
= socket(AF_UNIX
, SOCK_STREAM
, 0);
130 DEBUG(3, ("Could not create socket: %s\n", strerror(errno
)));
131 return map_nt_error_from_unix(errno
);
135 addr
.sun_family
= AF_UNIX
;
136 strncpy(addr
.sun_path
, sockname
, sizeof(addr
.sun_path
));
138 if (sys_connect(fd
, (struct sockaddr
*)&addr
) == -1) {
139 DEBUG(1, ("connect(%s) failed: %s\n", sockname
,
142 return map_nt_error_from_unix(errno
);
145 if (!(result
= packet_init(mem_ctx
, fd
))) {
147 return NT_STATUS_NO_MEMORY
;
155 * Do we have a complete ctdb packet in the queue?
158 static bool ctdb_req_complete(const uint8_t *buf
, size_t available
,
164 if (available
< sizeof(msglen
)) {
168 msglen
= *((uint32
*)buf
);
170 DEBUG(10, ("msglen = %d\n", msglen
));
172 if (msglen
< sizeof(struct ctdb_req_header
)) {
173 DEBUG(0, ("Got invalid msglen: %d, expected at least %d for "
174 "the req_header\n", (int)msglen
,
175 (int)sizeof(struct ctdb_req_header
)));
176 cluster_fatal("ctdbd protocol error\n");
179 if (available
< msglen
) {
188 * State necessary to defer an incoming message while we are waiting for a
192 struct deferred_msg_state
{
193 struct messaging_context
*msg_ctx
;
194 struct messaging_rec
*rec
;
198 * Timed event handler for the deferred message
201 static void deferred_message_dispatch(struct event_context
*event_ctx
,
202 struct timed_event
*te
,
206 struct deferred_msg_state
*state
= talloc_get_type_abort(
207 private_data
, struct deferred_msg_state
);
209 messaging_dispatch_rec(state
->msg_ctx
, state
->rec
);
214 struct req_pull_state
{
220 * Pull a ctdb request out of the incoming packet queue
223 static NTSTATUS
ctdb_req_pull(uint8_t *buf
, size_t length
,
226 struct req_pull_state
*state
= (struct req_pull_state
*)private_data
;
228 state
->req
.data
= talloc_move(state
->mem_ctx
, &buf
);
229 state
->req
.length
= length
;
234 * Fetch a messaging_rec from an incoming ctdb style message
237 static struct messaging_rec
*ctdb_pull_messaging_rec(TALLOC_CTX
*mem_ctx
,
238 size_t overall_length
,
239 struct ctdb_req_message
*msg
)
241 struct messaging_rec
*result
;
243 enum ndr_err_code ndr_err
;
245 if ((overall_length
< offsetof(struct ctdb_req_message
, data
))
247 < offsetof(struct ctdb_req_message
, data
) + msg
->datalen
)) {
249 cluster_fatal("got invalid msg length");
252 if (!(result
= TALLOC_P(mem_ctx
, struct messaging_rec
))) {
253 DEBUG(0, ("talloc failed\n"));
257 blob
= data_blob_const(msg
->data
, msg
->datalen
);
259 ndr_err
= ndr_pull_struct_blob(
260 &blob
, result
, NULL
, result
,
261 (ndr_pull_flags_fn_t
)ndr_pull_messaging_rec
);
263 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
264 DEBUG(0, ("ndr_pull_struct_blob failed: %s\n",
265 ndr_errstr(ndr_err
)));
270 if (DEBUGLEVEL
>= 10) {
271 DEBUG(10, ("ctdb_pull_messaging_rec:\n"));
272 NDR_PRINT_DEBUG(messaging_rec
, result
);
278 static NTSTATUS
ctdb_packet_fd_read_sync(struct packet_context
*ctx
)
280 struct timeval timeout
;
281 struct timeval
*ptimeout
;
283 timeout
= timeval_set(lp_ctdb_timeout(), 0);
284 ptimeout
= (timeout
.tv_sec
!= 0) ? &timeout
: NULL
;
286 return packet_fd_read_sync(ctx
, ptimeout
);
290 * Read a full ctdbd request. If we have a messaging context, defer incoming
291 * messages that might come in between.
294 static NTSTATUS
ctdb_read_req(struct ctdbd_connection
*conn
, uint32 reqid
,
295 TALLOC_CTX
*mem_ctx
, void *result
)
297 struct ctdb_req_header
*hdr
;
298 struct req_pull_state state
;
303 status
= ctdb_packet_fd_read_sync(conn
->pkt
);
305 if (NT_STATUS_EQUAL(status
, NT_STATUS_NETWORK_BUSY
)) {
308 } else if (NT_STATUS_EQUAL(status
, NT_STATUS_RETRY
)) {
313 if (!NT_STATUS_IS_OK(status
)) {
314 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status
)));
315 cluster_fatal("ctdbd died\n");
321 state
.mem_ctx
= mem_ctx
;
323 if (!packet_handler(conn
->pkt
, ctdb_req_complete
, ctdb_req_pull
,
328 DEBUG(10, ("not enough data from ctdb socket, retrying\n"));
332 if (!NT_STATUS_IS_OK(status
)) {
333 DEBUG(0, ("Could not read packet: %s\n", nt_errstr(status
)));
334 cluster_fatal("ctdbd died\n");
337 hdr
= (struct ctdb_req_header
*)state
.req
.data
;
339 DEBUG(10, ("Received ctdb packet\n"));
340 ctdb_packet_dump(hdr
);
342 if (hdr
->operation
== CTDB_REQ_MESSAGE
) {
343 struct timed_event
*evt
;
344 struct deferred_msg_state
*msg_state
;
345 struct ctdb_req_message
*msg
= (struct ctdb_req_message
*)hdr
;
347 if (conn
->msg_ctx
== NULL
) {
348 DEBUG(1, ("Got a message without having a msg ctx, "
349 "dropping msg %llu\n",
350 (long long unsigned)msg
->srvid
));
354 if ((conn
->release_ip_handler
!= NULL
)
355 && (msg
->srvid
== CTDB_SRVID_RELEASE_IP
)) {
356 /* must be dispatched immediately */
357 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
358 conn
->release_ip_handler((const char *)msg
->data
,
359 conn
->release_ip_priv
);
364 if (msg
->srvid
== CTDB_SRVID_RECONFIGURE
) {
365 DEBUG(0,("Got cluster reconfigure message in ctdb_read_req\n"));
366 messaging_send(conn
->msg_ctx
, procid_self(),
367 MSG_SMB_BRL_VALIDATE
, &data_blob_null
);
372 if (!(msg_state
= TALLOC_P(talloc_autofree_context(), struct deferred_msg_state
))) {
373 DEBUG(0, ("talloc failed\n"));
378 if (!(msg_state
->rec
= ctdb_pull_messaging_rec(
379 msg_state
, state
.req
.length
, msg
))) {
380 DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
381 TALLOC_FREE(msg_state
);
388 msg_state
->msg_ctx
= conn
->msg_ctx
;
391 * We're waiting for a call reply, but an async message has
392 * crossed. Defer dispatching to the toplevel event loop.
394 evt
= event_add_timed(conn
->msg_ctx
->event_ctx
,
395 conn
->msg_ctx
->event_ctx
,
397 deferred_message_dispatch
,
400 DEBUG(0, ("event_add_timed failed\n"));
401 TALLOC_FREE(msg_state
);
409 if (hdr
->reqid
!= reqid
) {
410 /* we got the wrong reply */
411 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
412 "been %u\n", hdr
->reqid
, reqid
));
417 *((void **)result
) = talloc_move(mem_ctx
, &hdr
);
423 * Get us a ctdbd connection
426 NTSTATUS
ctdbd_init_connection(TALLOC_CTX
*mem_ctx
,
427 struct ctdbd_connection
**pconn
)
429 struct ctdbd_connection
*conn
;
432 if (!(conn
= TALLOC_ZERO_P(mem_ctx
, struct ctdbd_connection
))) {
433 DEBUG(0, ("talloc failed\n"));
434 return NT_STATUS_NO_MEMORY
;
437 status
= ctdbd_connect(conn
, &conn
->pkt
);
439 if (!NT_STATUS_IS_OK(status
)) {
440 DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status
)));
444 status
= get_cluster_vnn(conn
, &conn
->our_vnn
);
446 if (!NT_STATUS_IS_OK(status
)) {
447 DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status
)));
451 generate_random_buffer((unsigned char *)&conn
->rand_srvid
,
452 sizeof(conn
->rand_srvid
));
454 status
= register_with_ctdbd(conn
, conn
->rand_srvid
);
456 if (!NT_STATUS_IS_OK(status
)) {
457 DEBUG(5, ("Could not register random srvid: %s\n",
471 * Get us a ctdbd connection and register us as a process
474 NTSTATUS
ctdbd_messaging_connection(TALLOC_CTX
*mem_ctx
,
475 struct ctdbd_connection
**pconn
)
477 struct ctdbd_connection
*conn
;
480 status
= ctdbd_init_connection(mem_ctx
, &conn
);
482 if (!NT_STATUS_IS_OK(status
)) {
486 status
= register_with_ctdbd(conn
, (uint64_t)sys_getpid());
487 if (!NT_STATUS_IS_OK(status
)) {
491 status
= register_with_ctdbd(conn
, MSG_SRVID_SAMBA
);
492 if (!NT_STATUS_IS_OK(status
)) {
505 * Packet handler to receive and handle a ctdb message
507 static NTSTATUS
ctdb_handle_message(uint8_t *buf
, size_t length
,
510 struct ctdbd_connection
*conn
= talloc_get_type_abort(
511 private_data
, struct ctdbd_connection
);
512 struct ctdb_req_message
*msg
;
513 struct messaging_rec
*msg_rec
;
515 msg
= (struct ctdb_req_message
*)buf
;
517 if (msg
->hdr
.operation
!= CTDB_REQ_MESSAGE
) {
518 DEBUG(0, ("Received async msg of type %u, discarding\n",
519 msg
->hdr
.operation
));
521 return NT_STATUS_INVALID_PARAMETER
;
524 if ((conn
->release_ip_handler
!= NULL
)
525 && (msg
->srvid
== CTDB_SRVID_RELEASE_IP
)) {
526 /* must be dispatched immediately */
527 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
528 conn
->release_ip_handler((const char *)msg
->data
,
529 conn
->release_ip_priv
);
534 SMB_ASSERT(conn
->msg_ctx
!= NULL
);
536 if (msg
->srvid
== CTDB_SRVID_RECONFIGURE
) {
537 DEBUG(0,("Got cluster reconfigure message\n"));
539 * when the cluster is reconfigured, we need to clean the brl
542 messaging_send(conn
->msg_ctx
, procid_self(),
543 MSG_SMB_BRL_VALIDATE
, &data_blob_null
);
546 * it's possible that we have just rejoined the cluster after
547 * an outage. In that case our pending locks could have been
548 * removed from the lockdb, so retry them once more
550 message_send_all(conn
->msg_ctx
, MSG_SMB_UNLOCK
, NULL
, 0, NULL
);
557 /* only messages to our pid or the broadcast are valid here */
558 if (msg
->srvid
!= sys_getpid() && msg
->srvid
!= MSG_SRVID_SAMBA
) {
559 DEBUG(0,("Got unexpected message with srvid=%llu\n",
560 (unsigned long long)msg
->srvid
));
565 if (!(msg_rec
= ctdb_pull_messaging_rec(NULL
, length
, msg
))) {
566 DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
568 return NT_STATUS_NO_MEMORY
;
571 messaging_dispatch_rec(conn
->msg_ctx
, msg_rec
);
573 TALLOC_FREE(msg_rec
);
579 * The ctdbd socket is readable asynchronuously
582 static void ctdbd_socket_handler(struct event_context
*event_ctx
,
583 struct fd_event
*event
,
587 struct ctdbd_connection
*conn
= talloc_get_type_abort(
588 private_data
, struct ctdbd_connection
);
592 status
= packet_fd_read(conn
->pkt
);
594 if (!NT_STATUS_IS_OK(status
)) {
595 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status
)));
596 cluster_fatal("ctdbd died\n");
599 while (packet_handler(conn
->pkt
, ctdb_req_complete
,
600 ctdb_handle_message
, conn
, &status
)) {
601 if (!NT_STATUS_IS_OK(status
)) {
602 DEBUG(10, ("could not handle incoming message: %s\n",
609 * Prepare a ctdbd connection to receive messages
612 NTSTATUS
ctdbd_register_msg_ctx(struct ctdbd_connection
*conn
,
613 struct messaging_context
*msg_ctx
)
615 SMB_ASSERT(conn
->msg_ctx
== NULL
);
616 SMB_ASSERT(conn
->fde
== NULL
);
618 if (!(conn
->fde
= event_add_fd(msg_ctx
->event_ctx
, conn
,
619 packet_get_fd(conn
->pkt
),
621 ctdbd_socket_handler
,
623 DEBUG(0, ("event_add_fd failed\n"));
624 return NT_STATUS_NO_MEMORY
;
627 conn
->msg_ctx
= msg_ctx
;
633 * Send a messaging message across a ctdbd
636 NTSTATUS
ctdbd_messaging_send(struct ctdbd_connection
*conn
,
637 uint32 dst_vnn
, uint64 dst_srvid
,
638 struct messaging_rec
*msg
)
640 struct ctdb_req_message r
;
644 enum ndr_err_code ndr_err
;
646 if (!(mem_ctx
= talloc_init("ctdbd_messaging_send"))) {
647 DEBUG(0, ("talloc failed\n"));
648 return NT_STATUS_NO_MEMORY
;
651 ndr_err
= ndr_push_struct_blob(
652 &blob
, mem_ctx
, NULL
, msg
,
653 (ndr_push_flags_fn_t
)ndr_push_messaging_rec
);
655 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
656 DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
657 ndr_errstr(ndr_err
)));
658 status
= ndr_map_error2ntstatus(ndr_err
);
662 r
.hdr
.length
= offsetof(struct ctdb_req_message
, data
) + blob
.length
;
663 r
.hdr
.ctdb_magic
= CTDB_MAGIC
;
664 r
.hdr
.ctdb_version
= CTDB_VERSION
;
665 r
.hdr
.generation
= 1;
666 r
.hdr
.operation
= CTDB_REQ_MESSAGE
;
667 r
.hdr
.destnode
= dst_vnn
;
668 r
.hdr
.srcnode
= conn
->our_vnn
;
671 r
.datalen
= blob
.length
;
673 DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
674 ctdb_packet_dump(&r
.hdr
);
676 status
= packet_send(
678 data_blob_const(&r
, offsetof(struct ctdb_req_message
, data
)),
681 if (!NT_STATUS_IS_OK(status
)) {
682 DEBUG(0, ("packet_send failed: %s\n", nt_errstr(status
)));
686 status
= packet_flush(conn
->pkt
);
688 if (!NT_STATUS_IS_OK(status
)) {
689 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status
)));
690 cluster_fatal("cluster dispatch daemon msg write error\n");
693 status
= NT_STATUS_OK
;
695 TALLOC_FREE(mem_ctx
);
700 * send/recv a generic ctdb control message
702 static NTSTATUS
ctdbd_control(struct ctdbd_connection
*conn
,
703 uint32_t vnn
, uint32 opcode
,
704 uint64_t srvid
, uint32_t flags
,
706 TALLOC_CTX
*mem_ctx
, TDB_DATA
*outdata
,
709 struct ctdb_req_control req
;
710 struct ctdb_reply_control
*reply
= NULL
;
711 struct ctdbd_connection
*new_conn
= NULL
;
714 /* the samba3 ctdb code can't handle NOREPLY yet */
715 flags
&= ~CTDB_CTRL_FLAG_NOREPLY
;
718 status
= ctdbd_init_connection(NULL
, &new_conn
);
720 if (!NT_STATUS_IS_OK(status
)) {
721 DEBUG(10, ("Could not init temp connection: %s\n",
730 req
.hdr
.length
= offsetof(struct ctdb_req_control
, data
) + data
.dsize
;
731 req
.hdr
.ctdb_magic
= CTDB_MAGIC
;
732 req
.hdr
.ctdb_version
= CTDB_VERSION
;
733 req
.hdr
.operation
= CTDB_REQ_CONTROL
;
734 req
.hdr
.reqid
= ++conn
->reqid
;
735 req
.hdr
.destnode
= vnn
;
738 req
.datalen
= data
.dsize
;
740 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
741 ctdb_packet_dump(&req
.hdr
);
743 status
= packet_send(
745 data_blob_const(&req
, offsetof(struct ctdb_req_control
, data
)),
746 data_blob_const(data
.dptr
, data
.dsize
));
748 if (!NT_STATUS_IS_OK(status
)) {
749 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status
)));
753 status
= packet_flush(conn
->pkt
);
755 if (!NT_STATUS_IS_OK(status
)) {
756 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status
)));
757 cluster_fatal("cluster dispatch daemon control write error\n");
760 if (flags
& CTDB_CTRL_FLAG_NOREPLY
) {
761 TALLOC_FREE(new_conn
);
765 status
= ctdb_read_req(conn
, req
.hdr
.reqid
, NULL
, (void *)&reply
);
767 if (!NT_STATUS_IS_OK(status
)) {
768 DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status
)));
772 if (reply
->hdr
.operation
!= CTDB_REPLY_CONTROL
) {
773 DEBUG(0, ("received invalid reply\n"));
778 if (!(outdata
->dptr
= (uint8
*)talloc_memdup(
779 mem_ctx
, reply
->data
, reply
->datalen
))) {
781 return NT_STATUS_NO_MEMORY
;
783 outdata
->dsize
= reply
->datalen
;
786 (*cstatus
) = reply
->status
;
789 status
= NT_STATUS_OK
;
792 TALLOC_FREE(new_conn
);
798 * see if a remote process exists
800 bool ctdbd_process_exists(struct ctdbd_connection
*conn
, uint32 vnn
, pid_t pid
)
806 data
.dptr
= (uint8_t*)&pid
;
807 data
.dsize
= sizeof(pid
);
809 status
= ctdbd_control(conn
, vnn
, CTDB_CONTROL_PROCESS_EXISTS
, 0, 0,
810 data
, NULL
, NULL
, &cstatus
);
811 if (!NT_STATUS_IS_OK(status
)) {
812 DEBUG(0, (__location__
" ctdb_control for process_exists "
823 char *ctdbd_dbpath(struct ctdbd_connection
*conn
,
824 TALLOC_CTX
*mem_ctx
, uint32_t db_id
)
830 data
.dptr
= (uint8_t*)&db_id
;
831 data
.dsize
= sizeof(db_id
);
833 status
= ctdbd_control(conn
, CTDB_CURRENT_NODE
,
834 CTDB_CONTROL_GETDBPATH
, 0, 0, data
,
835 mem_ctx
, &data
, &cstatus
);
836 if (!NT_STATUS_IS_OK(status
) || cstatus
!= 0) {
837 DEBUG(0,(__location__
" ctdb_control for getdbpath failed\n"));
841 return (char *)data
.dptr
;
845 * attach to a ctdb database
847 NTSTATUS
ctdbd_db_attach(struct ctdbd_connection
*conn
,
848 const char *name
, uint32_t *db_id
, int tdb_flags
)
853 bool persistent
= (tdb_flags
& TDB_CLEAR_IF_FIRST
) == 0;
855 data
.dptr
= (uint8_t*)name
;
856 data
.dsize
= strlen(name
)+1;
858 status
= ctdbd_control(conn
, CTDB_CURRENT_NODE
,
860 ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
861 : CTDB_CONTROL_DB_ATTACH
,
862 0, 0, data
, NULL
, &data
, &cstatus
);
863 if (!NT_STATUS_IS_OK(status
)) {
864 DEBUG(0, (__location__
" ctdb_control for db_attach "
865 "failed: %s\n", nt_errstr(status
)));
869 if (cstatus
!= 0 || data
.dsize
!= sizeof(uint32_t)) {
870 DEBUG(0,(__location__
" ctdb_control for db_attach failed\n"));
871 return NT_STATUS_INTERNAL_ERROR
;
874 *db_id
= *(uint32_t *)data
.dptr
;
875 talloc_free(data
.dptr
);
877 if (!(tdb_flags
& TDB_SEQNUM
)) {
881 data
.dptr
= (uint8_t *)db_id
;
882 data
.dsize
= sizeof(*db_id
);
884 status
= ctdbd_control(conn
, CTDB_CURRENT_NODE
,
885 CTDB_CONTROL_ENABLE_SEQNUM
, 0, 0, data
,
886 NULL
, NULL
, &cstatus
);
887 if (!NT_STATUS_IS_OK(status
) || cstatus
!= 0) {
888 DEBUG(0,(__location__
" ctdb_control for enable seqnum "
890 return NT_STATUS_IS_OK(status
) ? NT_STATUS_INTERNAL_ERROR
:
898 * force the migration of a record to this node
900 NTSTATUS
ctdbd_migrate(struct ctdbd_connection
*conn
, uint32 db_id
,
903 struct ctdb_req_call req
;
904 struct ctdb_reply_call
*reply
;
909 req
.hdr
.length
= offsetof(struct ctdb_req_call
, data
) + key
.dsize
;
910 req
.hdr
.ctdb_magic
= CTDB_MAGIC
;
911 req
.hdr
.ctdb_version
= CTDB_VERSION
;
912 req
.hdr
.operation
= CTDB_REQ_CALL
;
913 req
.hdr
.reqid
= ++conn
->reqid
;
914 req
.flags
= CTDB_IMMEDIATE_MIGRATION
;
915 req
.callid
= CTDB_NULL_FUNC
;
917 req
.keylen
= key
.dsize
;
919 DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
920 ctdb_packet_dump(&req
.hdr
);
922 status
= packet_send(
924 data_blob_const(&req
, offsetof(struct ctdb_req_call
, data
)),
925 data_blob_const(key
.dptr
, key
.dsize
));
927 if (!NT_STATUS_IS_OK(status
)) {
928 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status
)));
932 status
= packet_flush(conn
->pkt
);
934 if (!NT_STATUS_IS_OK(status
)) {
935 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status
)));
936 cluster_fatal("cluster dispatch daemon control write error\n");
939 status
= ctdb_read_req(conn
, req
.hdr
.reqid
, NULL
, (void *)&reply
);
941 if (!NT_STATUS_IS_OK(status
)) {
942 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status
)));
946 if (reply
->hdr
.operation
!= CTDB_REPLY_CALL
) {
947 DEBUG(0, ("received invalid reply\n"));
948 status
= NT_STATUS_INTERNAL_ERROR
;
952 status
= NT_STATUS_OK
;
960 * remotely fetch a record without locking it or forcing a migration
962 NTSTATUS
ctdbd_fetch(struct ctdbd_connection
*conn
, uint32 db_id
,
963 TDB_DATA key
, TALLOC_CTX
*mem_ctx
, TDB_DATA
*data
)
965 struct ctdb_req_call req
;
966 struct ctdb_reply_call
*reply
;
971 req
.hdr
.length
= offsetof(struct ctdb_req_call
, data
) + key
.dsize
;
972 req
.hdr
.ctdb_magic
= CTDB_MAGIC
;
973 req
.hdr
.ctdb_version
= CTDB_VERSION
;
974 req
.hdr
.operation
= CTDB_REQ_CALL
;
975 req
.hdr
.reqid
= ++conn
->reqid
;
977 req
.callid
= CTDB_FETCH_FUNC
;
979 req
.keylen
= key
.dsize
;
981 status
= packet_send(
983 data_blob_const(&req
, offsetof(struct ctdb_req_call
, data
)),
984 data_blob_const(key
.dptr
, key
.dsize
));
986 if (!NT_STATUS_IS_OK(status
)) {
987 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status
)));
991 status
= packet_flush(conn
->pkt
);
993 if (!NT_STATUS_IS_OK(status
)) {
994 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status
)));
995 cluster_fatal("cluster dispatch daemon control write error\n");
998 status
= ctdb_read_req(conn
, req
.hdr
.reqid
, NULL
, (void *)&reply
);
1000 if (!NT_STATUS_IS_OK(status
)) {
1001 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status
)));
1005 if (reply
->hdr
.operation
!= CTDB_REPLY_CALL
) {
1006 DEBUG(0, ("received invalid reply\n"));
1007 status
= NT_STATUS_INTERNAL_ERROR
;
1011 data
->dsize
= reply
->datalen
;
1012 if (data
->dsize
== 0) {
1017 data
->dptr
= (uint8
*)talloc_memdup(mem_ctx
, &reply
->data
[0],
1019 if (data
->dptr
== NULL
) {
1020 DEBUG(0, ("talloc failed\n"));
1021 status
= NT_STATUS_NO_MEMORY
;
1026 status
= NT_STATUS_OK
;
1032 struct ctdbd_traverse_state
{
1033 void (*fn
)(TDB_DATA key
, TDB_DATA data
, void *private_data
);
1038 * Handle a traverse record coming in on the ctdbd connection
1041 static NTSTATUS
ctdb_traverse_handler(uint8_t *buf
, size_t length
,
1044 struct ctdbd_traverse_state
*state
=
1045 (struct ctdbd_traverse_state
*)private_data
;
1047 struct ctdb_req_message
*m
;
1048 struct ctdb_rec_data
*d
;
1051 m
= (struct ctdb_req_message
*)buf
;
1053 if (length
< sizeof(*m
) || m
->hdr
.length
!= length
) {
1054 DEBUG(0, ("Got invalid message of length %d\n", (int)length
));
1056 return NT_STATUS_UNEXPECTED_IO_ERROR
;
1059 d
= (struct ctdb_rec_data
*)&m
->data
[0];
1060 if (m
->datalen
< sizeof(uint32_t) || m
->datalen
!= d
->length
) {
1061 DEBUG(0, ("Got invalid traverse data of length %d\n",
1064 return NT_STATUS_UNEXPECTED_IO_ERROR
;
1067 key
.dsize
= d
->keylen
;
1068 key
.dptr
= &d
->data
[0];
1069 data
.dsize
= d
->datalen
;
1070 data
.dptr
= &d
->data
[d
->keylen
];
1072 if (key
.dsize
== 0 && data
.dsize
== 0) {
1073 /* end of traverse */
1074 return NT_STATUS_END_OF_FILE
;
1077 if (data
.dsize
< sizeof(struct ctdb_ltdb_header
)) {
1078 DEBUG(0, ("Got invalid ltdb header length %d\n",
1081 return NT_STATUS_UNEXPECTED_IO_ERROR
;
1083 data
.dsize
-= sizeof(struct ctdb_ltdb_header
);
1084 data
.dptr
+= sizeof(struct ctdb_ltdb_header
);
1087 state
->fn(key
, data
, state
->private_data
);
1091 return NT_STATUS_OK
;
1095 Traverse a ctdb database. This uses a kind-of hackish way to open a second
1096 connection to ctdbd to avoid the hairy recursive and async problems with
1100 NTSTATUS
ctdbd_traverse(uint32 db_id
,
1101 void (*fn
)(TDB_DATA key
, TDB_DATA data
,
1102 void *private_data
),
1105 struct ctdbd_connection
*conn
;
1109 struct ctdb_traverse_start t
;
1111 struct ctdbd_traverse_state state
;
1113 status
= ctdbd_init_connection(NULL
, &conn
);
1114 if (!NT_STATUS_IS_OK(status
)) {
1115 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1116 nt_errstr(status
)));
1121 t
.srvid
= conn
->rand_srvid
;
1122 t
.reqid
= ++conn
->reqid
;
1124 data
.dptr
= (uint8_t *)&t
;
1125 data
.dsize
= sizeof(t
);
1127 status
= ctdbd_control(conn
, CTDB_CURRENT_NODE
,
1128 CTDB_CONTROL_TRAVERSE_START
, conn
->rand_srvid
, 0,
1129 data
, NULL
, NULL
, &cstatus
);
1131 if (!NT_STATUS_IS_OK(status
) || (cstatus
!= 0)) {
1133 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status
),
1136 if (NT_STATUS_IS_OK(status
)) {
1138 * We need a mapping here
1140 status
= NT_STATUS_UNSUCCESSFUL
;
1146 state
.private_data
= private_data
;
1150 status
= NT_STATUS_OK
;
1152 if (packet_handler(conn
->pkt
, ctdb_req_complete
,
1153 ctdb_traverse_handler
, &state
, &status
)) {
1155 if (NT_STATUS_EQUAL(status
, NT_STATUS_END_OF_FILE
)) {
1156 status
= NT_STATUS_OK
;
1161 * There might be more in the queue
1166 if (!NT_STATUS_IS_OK(status
)) {
1170 status
= ctdb_packet_fd_read_sync(conn
->pkt
);
1172 if (NT_STATUS_EQUAL(status
, NT_STATUS_RETRY
)) {
1174 * There might be more in the queue
1179 if (NT_STATUS_EQUAL(status
, NT_STATUS_END_OF_FILE
)) {
1180 status
= NT_STATUS_OK
;
1184 if (!NT_STATUS_IS_OK(status
)) {
1185 DEBUG(0, ("packet_fd_read_sync failed: %s\n", nt_errstr(status
)));
1186 cluster_fatal("ctdbd died\n");
1196 This is used to canonicalize a ctdb_sock_addr structure.
1198 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage
*in
,
1199 struct sockaddr_storage
*out
)
1201 memcpy(out
, in
, sizeof (*out
));
1204 if (in
->ss_family
== AF_INET6
) {
1205 const char prefix
[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1206 const struct sockaddr_in6
*in6
= (struct sockaddr_in6
*)in
;
1207 struct sockaddr_in
*out4
= (struct sockaddr_in
*)out
;
1208 if (memcmp(&in6
->sin6_addr
, prefix
, 12) == 0) {
1209 memset(out
, 0, sizeof(*out
));
1210 #ifdef HAVE_SOCK_SIN_LEN
1211 out4
->sin_len
= sizeof(*out
);
1213 out4
->sin_family
= AF_INET
;
1214 out4
->sin_port
= in6
->sin6_port
;
1215 memcpy(&out4
->sin_addr
, &in6
->sin6_addr
.s6_addr32
[3], 4);
1222 * Register us as a server for a particular tcp connection
1225 NTSTATUS
ctdbd_register_ips(struct ctdbd_connection
*conn
,
1226 const struct sockaddr_storage
*_server
,
1227 const struct sockaddr_storage
*_client
,
1228 void (*release_ip_handler
)(const char *ip_addr
,
1229 void *private_data
),
1233 * we still use ctdb_control_tcp for ipv4
1234 * because we want to work against older ctdb
1235 * versions at runtime
1237 struct ctdb_control_tcp p4
;
1238 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1239 struct ctdb_control_tcp_addr p
;
1243 struct sockaddr_storage client
;
1244 struct sockaddr_storage server
;
1247 * Only one connection so far
1249 SMB_ASSERT(conn
->release_ip_handler
== NULL
);
1251 smbd_ctdb_canonicalize_ip(_client
, &client
);
1252 smbd_ctdb_canonicalize_ip(_server
, &server
);
1254 switch (client
.ss_family
) {
1256 p4
.dest
= *(struct sockaddr_in
*)&server
;
1257 p4
.src
= *(struct sockaddr_in
*)&client
;
1258 data
.dptr
= (uint8_t *)&p4
;
1259 data
.dsize
= sizeof(p4
);
1261 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1263 p
.dest
.ip6
= *(struct sockaddr_in6
*)&server
;
1264 p
.src
.ip6
= *(struct sockaddr_in6
*)&client
;
1265 data
.dptr
= (uint8_t *)&p
;
1266 data
.dsize
= sizeof(p
);
1270 return NT_STATUS_INTERNAL_ERROR
;
1273 conn
->release_ip_handler
= release_ip_handler
;
1276 * We want to be told about IP releases
1279 status
= register_with_ctdbd(conn
, CTDB_SRVID_RELEASE_IP
);
1280 if (!NT_STATUS_IS_OK(status
)) {
1285 * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1286 * can send an extra ack to trigger a reset for our client, so it
1287 * immediately reconnects
1289 return ctdbd_control(conn
, CTDB_CURRENT_NODE
,
1290 CTDB_CONTROL_TCP_CLIENT
, 0,
1291 CTDB_CTRL_FLAG_NOREPLY
, data
, NULL
, NULL
, NULL
);
1295 * We want to handle reconfigure events
1297 NTSTATUS
ctdbd_register_reconfigure(struct ctdbd_connection
*conn
)
1299 return register_with_ctdbd(conn
, CTDB_SRVID_RECONFIGURE
);
1303 call a control on the local node
1305 NTSTATUS
ctdbd_control_local(struct ctdbd_connection
*conn
, uint32 opcode
,
1306 uint64_t srvid
, uint32_t flags
, TDB_DATA data
,
1307 TALLOC_CTX
*mem_ctx
, TDB_DATA
*outdata
,
1310 return ctdbd_control(conn
, CTDB_CURRENT_NODE
, opcode
, srvid
, flags
, data
, mem_ctx
, outdata
, cstatus
);
1315 NTSTATUS
ctdbd_init_connection(TALLOC_CTX
*mem_ctx
,
1316 struct ctdbd_connection
**pconn
)
1318 return NT_STATUS_NOT_IMPLEMENTED
;