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/>.
24 #include "ctdbd_conn.h"
25 #include "system/select.h"
26 #include "lib/util/sys_rw_data.h"
27 #include "lib/util/iov_buf.h"
31 /* paths to these include files come from --with-ctdb= in configure */
33 #include "ctdb_private.h"
35 struct ctdbd_srvid_cb {
37 int (*cb)(uint32_t src_vnn, uint32_t dst_vnn,
39 const uint8_t *msg, size_t msglen,
44 struct ctdbd_connection {
45 const char *sockname; /* Needed in ctdbd_traverse */
46 struct messaging_context *msg_ctx;
50 struct ctdbd_srvid_cb *callbacks;
52 struct tevent_fd *fde;
56 static uint32_t ctdbd_next_reqid(struct ctdbd_connection *conn)
59 if (conn->reqid == 0) {
65 static int ctdbd_control(struct ctdbd_connection *conn,
66 uint32_t vnn, uint32_t opcode,
67 uint64_t srvid, uint32_t flags,
69 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
73 * exit on fatal communications errors with the ctdbd daemon
75 static void cluster_fatal(const char *why)
77 DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
78 /* we don't use smb_panic() as we don't want to delay to write
79 a core file. We need to release this process id immediately
80 so that someone else can take over without getting sharing
88 static void ctdb_packet_dump(struct ctdb_req_header *hdr)
90 if (DEBUGLEVEL < 11) {
93 DEBUGADD(11, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
94 (int)hdr->length, (int)hdr->ctdb_magic,
95 (int)hdr->ctdb_version, (int)hdr->generation,
96 (int)hdr->operation, (int)hdr->reqid));
100 * Register a srvid with ctdbd
102 int register_with_ctdbd(struct ctdbd_connection *conn, uint64_t srvid,
103 int (*cb)(uint32_t src_vnn, uint32_t dst_vnn,
105 const uint8_t *msg, size_t msglen,
111 size_t num_callbacks;
112 struct ctdbd_srvid_cb *tmp;
114 ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
115 CTDB_CONTROL_REGISTER_SRVID, srvid, 0,
116 tdb_null, NULL, NULL, &cstatus);
121 num_callbacks = talloc_array_length(conn->callbacks);
123 tmp = talloc_realloc(conn, conn->callbacks, struct ctdbd_srvid_cb,
128 conn->callbacks = tmp;
130 conn->callbacks[num_callbacks] = (struct ctdbd_srvid_cb) {
131 .srvid = srvid, .cb = cb, .private_data = private_data
137 static int ctdbd_msg_call_back(struct ctdbd_connection *conn,
138 struct ctdb_req_message_old *msg)
141 size_t i, num_callbacks;
143 msg_len = msg->hdr.length;
144 if (msg_len < offsetof(struct ctdb_req_message_old, data)) {
145 DEBUG(10, ("%s: len %u too small\n", __func__,
149 msg_len -= offsetof(struct ctdb_req_message_old, data);
151 if (msg_len < msg->datalen) {
152 DEBUG(10, ("%s: msg_len=%u < msg->datalen=%u\n", __func__,
153 (unsigned)msg_len, (unsigned)msg->datalen));
157 num_callbacks = talloc_array_length(conn->callbacks);
159 for (i=0; i<num_callbacks; i++) {
160 struct ctdbd_srvid_cb *cb = &conn->callbacks[i];
162 if ((cb->srvid == msg->srvid) && (cb->cb != NULL)) {
165 ret = cb->cb(msg->hdr.srcnode, msg->hdr.destnode,
166 msg->srvid, msg->data, msg->datalen,
177 * get our vnn from the cluster
179 static int get_cluster_vnn(struct ctdbd_connection *conn, uint32_t *vnn)
183 ret = ctdbd_control(conn,
184 CTDB_CURRENT_NODE, CTDB_CONTROL_GET_PNN, 0, 0,
185 tdb_null, NULL, NULL, &cstatus);
187 DEBUG(1, ("ctdbd_control failed: %s\n", strerror(ret)));
190 *vnn = (uint32_t)cstatus;
195 * Are we active (i.e. not banned or stopped?)
197 static bool ctdbd_working(struct ctdbd_connection *conn, uint32_t vnn)
201 struct ctdb_node_map_old *m;
202 uint32_t failure_flags;
206 ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
207 CTDB_CONTROL_GET_NODEMAP, 0, 0,
208 tdb_null, talloc_tos(), &outdata, &cstatus);
210 DEBUG(1, ("ctdbd_control failed: %s\n", strerror(ret)));
213 if ((cstatus != 0) || (outdata.dptr == NULL)) {
214 DEBUG(2, ("Received invalid ctdb data\n"));
218 m = (struct ctdb_node_map_old *)outdata.dptr;
220 for (i=0; i<m->num; i++) {
221 if (vnn == m->nodes[i].pnn) {
227 DEBUG(2, ("Did not find ourselves (node %d) in nodemap\n",
232 failure_flags = NODE_FLAGS_BANNED | NODE_FLAGS_DISCONNECTED
233 | NODE_FLAGS_PERMANENTLY_DISABLED | NODE_FLAGS_STOPPED;
235 if ((m->nodes[i].flags & failure_flags) != 0) {
236 DEBUG(2, ("Node has status %x, not active\n",
237 (int)m->nodes[i].flags));
243 TALLOC_FREE(outdata.dptr);
247 uint32_t ctdbd_vnn(const struct ctdbd_connection *conn)
249 return conn->our_vnn;
253 * Get us a ctdb connection
256 static int ctdbd_connect(const char *sockname, int *pfd)
258 struct sockaddr_un addr = { 0, };
263 fd = socket(AF_UNIX, SOCK_STREAM, 0);
266 DEBUG(3, ("Could not create socket: %s\n", strerror(err)));
270 addr.sun_family = AF_UNIX;
272 namelen = strlcpy(addr.sun_path, sockname, sizeof(addr.sun_path));
273 if (namelen >= sizeof(addr.sun_path)) {
274 DEBUG(3, ("%s: Socket name too long: %s\n", __func__,
280 salen = sizeof(struct sockaddr_un);
282 if (connect(fd, (struct sockaddr *)(void *)&addr, salen) == -1) {
284 DEBUG(1, ("connect(%s) failed: %s\n", sockname,
294 static int ctdb_read_packet(int fd, int timeout, TALLOC_CTX *mem_ctx,
295 struct ctdb_req_header **result)
297 struct ctdb_req_header *req;
303 ret = poll_intr_one_fd(fd, POLLIN, timeout, &revents);
315 nread = read_data(fd, &msglen, sizeof(msglen));
323 if (msglen < sizeof(struct ctdb_req_header)) {
327 req = talloc_size(mem_ctx, msglen);
331 talloc_set_name_const(req, "struct ctdb_req_header");
333 req->length = msglen;
335 nread = read_data(fd, ((char *)req) + sizeof(msglen),
336 msglen - sizeof(msglen));
351 * Read a full ctdbd request. If we have a messaging context, defer incoming
352 * messages that might come in between.
355 static int ctdb_read_req(struct ctdbd_connection *conn, uint32_t reqid,
356 TALLOC_CTX *mem_ctx, struct ctdb_req_header **result)
358 struct ctdb_req_header *hdr;
363 ret = ctdb_read_packet(conn->fd, conn->timeout, mem_ctx, &hdr);
365 DEBUG(0, ("ctdb_read_packet failed: %s\n", strerror(ret)));
366 cluster_fatal("ctdbd died\n");
369 DEBUG(11, ("Received ctdb packet\n"));
370 ctdb_packet_dump(hdr);
372 if (hdr->operation == CTDB_REQ_MESSAGE) {
373 struct ctdb_req_message_old *msg = (struct ctdb_req_message_old *)hdr;
375 if (conn->msg_ctx == NULL) {
376 DEBUG(1, ("Got a message without having a msg ctx, "
377 "dropping msg %llu\n",
378 (long long unsigned)msg->srvid));
383 ret = ctdbd_msg_call_back(conn, msg);
393 if ((reqid != 0) && (hdr->reqid != reqid)) {
394 /* we got the wrong reply */
395 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
396 "been %u\n", hdr->reqid, reqid));
401 *result = talloc_move(mem_ctx, &hdr);
406 static int ctdbd_connection_destructor(struct ctdbd_connection *c)
416 * Get us a ctdbd connection
419 static int ctdbd_init_connection(TALLOC_CTX *mem_ctx,
420 const char *sockname, int timeout,
421 struct ctdbd_connection **pconn)
423 struct ctdbd_connection *conn;
426 if (!(conn = talloc_zero(mem_ctx, struct ctdbd_connection))) {
427 DEBUG(0, ("talloc failed\n"));
431 conn->sockname = talloc_strdup(conn, sockname);
432 if (conn->sockname == NULL) {
433 DBG_ERR("talloc failed\n");
438 conn->timeout = timeout;
440 if (conn->timeout == 0) {
444 ret = ctdbd_connect(conn->sockname, &conn->fd);
446 DEBUG(1, ("ctdbd_connect failed: %s\n", strerror(ret)));
449 talloc_set_destructor(conn, ctdbd_connection_destructor);
451 ret = get_cluster_vnn(conn, &conn->our_vnn);
454 DEBUG(10, ("get_cluster_vnn failed: %s\n", strerror(ret)));
458 if (!ctdbd_working(conn, conn->our_vnn)) {
459 DEBUG(2, ("Node is not working, can not connect\n"));
464 generate_random_buffer((unsigned char *)&conn->rand_srvid,
465 sizeof(conn->rand_srvid));
467 ret = register_with_ctdbd(conn, conn->rand_srvid, NULL, NULL);
470 DEBUG(5, ("Could not register random srvid: %s\n",
484 * Get us a ctdbd connection and register us as a process
487 int ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
488 const char *sockname, int timeout,
489 struct ctdbd_connection **pconn)
491 struct ctdbd_connection *conn;
494 ret = ctdbd_init_connection(mem_ctx, sockname, timeout, &conn);
500 ret = register_with_ctdbd(conn, MSG_SRVID_SAMBA, NULL, NULL);
513 struct messaging_context *ctdb_conn_msg_ctx(struct ctdbd_connection *conn)
515 return conn->msg_ctx;
518 int ctdbd_conn_get_fd(struct ctdbd_connection *conn)
524 * Packet handler to receive and handle a ctdb message
526 static int ctdb_handle_message(struct ctdbd_connection *conn,
527 struct ctdb_req_header *hdr)
529 struct ctdb_req_message_old *msg;
531 if (hdr->operation != CTDB_REQ_MESSAGE) {
532 DEBUG(0, ("Received async msg of type %u, discarding\n",
537 msg = (struct ctdb_req_message_old *)hdr;
539 ctdbd_msg_call_back(conn, msg);
545 * The ctdbd socket is readable asynchronuously
548 static void ctdbd_socket_handler(struct tevent_context *event_ctx,
549 struct tevent_fd *event,
553 struct ctdbd_connection *conn = talloc_get_type_abort(
554 private_data, struct ctdbd_connection);
555 struct ctdb_req_header *hdr = NULL;
558 ret = ctdb_read_packet(conn->fd, conn->timeout, talloc_tos(), &hdr);
560 DEBUG(0, ("ctdb_read_packet failed: %s\n", strerror(ret)));
561 cluster_fatal("ctdbd died\n");
564 ret = ctdb_handle_message(conn, hdr);
569 DEBUG(10, ("could not handle incoming message: %s\n",
575 * Prepare a ctdbd connection to receive messages
578 int ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
579 struct messaging_context *msg_ctx,
580 struct tevent_context *ev)
582 SMB_ASSERT(conn->msg_ctx == NULL);
583 SMB_ASSERT(conn->fde == NULL);
585 conn->fde = tevent_add_fd(ev, conn, conn->fd, TEVENT_FD_READ,
586 ctdbd_socket_handler, conn);
587 if (conn->fde == NULL) {
588 DEBUG(0, ("event_add_fd failed\n"));
592 conn->msg_ctx = msg_ctx;
597 int ctdbd_messaging_send_iov(struct ctdbd_connection *conn,
598 uint32_t dst_vnn, uint64_t dst_srvid,
599 const struct iovec *iov, int iovlen)
601 struct ctdb_req_message_old r;
602 struct iovec iov2[iovlen+1];
603 size_t buflen = iov_buflen(iov, iovlen);
606 r.hdr.length = offsetof(struct ctdb_req_message_old, data) + buflen;
607 r.hdr.ctdb_magic = CTDB_MAGIC;
608 r.hdr.ctdb_version = CTDB_PROTOCOL;
609 r.hdr.generation = 1;
610 r.hdr.operation = CTDB_REQ_MESSAGE;
611 r.hdr.destnode = dst_vnn;
612 r.hdr.srcnode = conn->our_vnn;
617 DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
618 ctdb_packet_dump(&r.hdr);
620 iov2[0].iov_base = &r;
621 iov2[0].iov_len = offsetof(struct ctdb_req_message_old, data);
622 memcpy(&iov2[1], iov, iovlen * sizeof(struct iovec));
624 nwritten = write_data_iov(conn->fd, iov2, iovlen+1);
625 if (nwritten == -1) {
626 DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
627 cluster_fatal("cluster dispatch daemon msg write error\n");
634 * send/recv a generic ctdb control message
636 static int ctdbd_control(struct ctdbd_connection *conn,
637 uint32_t vnn, uint32_t opcode,
638 uint64_t srvid, uint32_t flags,
640 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
643 struct ctdb_req_control_old req;
644 struct ctdb_req_header *hdr;
645 struct ctdb_reply_control_old *reply = NULL;
651 req.hdr.length = offsetof(struct ctdb_req_control_old, data) + data.dsize;
652 req.hdr.ctdb_magic = CTDB_MAGIC;
653 req.hdr.ctdb_version = CTDB_PROTOCOL;
654 req.hdr.operation = CTDB_REQ_CONTROL;
655 req.hdr.reqid = ctdbd_next_reqid(conn);
656 req.hdr.destnode = vnn;
659 req.datalen = data.dsize;
662 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
663 ctdb_packet_dump(&req.hdr);
665 iov[0].iov_base = &req;
666 iov[0].iov_len = offsetof(struct ctdb_req_control_old, data);
667 iov[1].iov_base = data.dptr;
668 iov[1].iov_len = data.dsize;
670 nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
671 if (nwritten == -1) {
672 DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
673 cluster_fatal("cluster dispatch daemon msg write error\n");
676 if (flags & CTDB_CTRL_FLAG_NOREPLY) {
683 ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
685 DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
689 if (hdr->operation != CTDB_REPLY_CONTROL) {
690 DEBUG(0, ("received invalid reply\n"));
694 reply = (struct ctdb_reply_control_old *)hdr;
697 if (!(outdata->dptr = (uint8_t *)talloc_memdup(
698 mem_ctx, reply->data, reply->datalen))) {
702 outdata->dsize = reply->datalen;
705 (*cstatus) = reply->status;
713 * see if a remote process exists
715 bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32_t vnn, pid_t pid)
723 if (!ctdb_processes_exist(conn, &id, 1, &result)) {
724 DEBUG(10, ("ctdb_processes_exist failed\n"));
730 bool ctdb_processes_exist(struct ctdbd_connection *conn,
731 const struct server_id *pids, int num_pids,
734 TALLOC_CTX *frame = talloc_stackframe();
739 reqids = talloc_array(talloc_tos(), uint32_t, num_pids);
740 if (reqids == NULL) {
744 for (i=0; i<num_pids; i++) {
745 struct ctdb_req_control_old req;
751 reqids[i] = ctdbd_next_reqid(conn);
756 * pids[i].pid is uint64_t, scale down to pid_t which
757 * is the wire protocol towards ctdb.
761 DEBUG(10, ("Requesting PID %d/%d, reqid=%d\n",
762 (int)pids[i].vnn, (int)pid,
765 req.hdr.length = offsetof(struct ctdb_req_control_old, data);
766 req.hdr.length += sizeof(pid);
767 req.hdr.ctdb_magic = CTDB_MAGIC;
768 req.hdr.ctdb_version = CTDB_PROTOCOL;
769 req.hdr.operation = CTDB_REQ_CONTROL;
770 req.hdr.reqid = reqids[i];
771 req.hdr.destnode = pids[i].vnn;
772 req.opcode = CTDB_CONTROL_PROCESS_EXISTS;
774 req.datalen = sizeof(pid);
777 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
778 ctdb_packet_dump(&req.hdr);
780 iov[0].iov_base = &req;
781 iov[0].iov_len = offsetof(struct ctdb_req_control_old, data);
782 iov[1].iov_base = &pid;
783 iov[1].iov_len = sizeof(pid);
785 nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
786 if (nwritten == -1) {
787 DEBUG(10, ("write_data_iov failed: %s\n",
795 while (num_received < num_pids) {
796 struct ctdb_req_header *hdr;
797 struct ctdb_reply_control_old *reply;
801 ret = ctdb_read_req(conn, 0, talloc_tos(), &hdr);
803 DEBUG(10, ("ctdb_read_req failed: %s\n",
808 if (hdr->operation != CTDB_REPLY_CONTROL) {
809 DEBUG(10, ("Received invalid reply\n"));
812 reply = (struct ctdb_reply_control_old *)hdr;
814 reqid = reply->hdr.reqid;
816 DEBUG(10, ("Received reqid %d\n", (int)reqid));
818 for (i=0; i<num_pids; i++) {
819 if (reqid == reqids[i]) {
824 DEBUG(10, ("Received unknown record number %u\n",
828 results[i] = ((reply->status) == 0);
842 char *ctdbd_dbpath(struct ctdbd_connection *conn,
843 TALLOC_CTX *mem_ctx, uint32_t db_id)
847 TDB_DATA rdata = {0};
850 data.dptr = (uint8_t*)&db_id;
851 data.dsize = sizeof(db_id);
853 ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
854 CTDB_CONTROL_GETDBPATH, 0, 0, data,
855 mem_ctx, &rdata, &cstatus);
856 if ((ret != 0) || cstatus != 0) {
857 DEBUG(0, (__location__ " ctdb_control for getdbpath failed: %s\n",
862 return (char *)rdata.dptr;
866 * attach to a ctdb database
868 int ctdbd_db_attach(struct ctdbd_connection *conn,
869 const char *name, uint32_t *db_id, int tdb_flags)
874 bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
876 data = string_term_tdb_data(name);
878 ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
880 ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
881 : CTDB_CONTROL_DB_ATTACH,
882 tdb_flags, 0, data, NULL, &data, &cstatus);
884 DEBUG(0, (__location__ " ctdb_control for db_attach "
885 "failed: %s\n", strerror(ret)));
889 if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
890 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
894 *db_id = *(uint32_t *)data.dptr;
895 talloc_free(data.dptr);
897 if (!(tdb_flags & TDB_SEQNUM)) {
901 data.dptr = (uint8_t *)db_id;
902 data.dsize = sizeof(*db_id);
904 ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
905 CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
906 NULL, NULL, &cstatus);
907 if ((ret != 0) || cstatus != 0) {
908 DEBUG(0, (__location__ " ctdb_control for enable seqnum "
909 "failed: %s\n", strerror(ret)));
910 return (ret == 0) ? EIO : ret;
917 * force the migration of a record to this node
919 int ctdbd_migrate(struct ctdbd_connection *conn, uint32_t db_id, TDB_DATA key)
921 struct ctdb_req_call_old req;
922 struct ctdb_req_header *hdr;
929 req.hdr.length = offsetof(struct ctdb_req_call_old, data) + key.dsize;
930 req.hdr.ctdb_magic = CTDB_MAGIC;
931 req.hdr.ctdb_version = CTDB_PROTOCOL;
932 req.hdr.operation = CTDB_REQ_CALL;
933 req.hdr.reqid = ctdbd_next_reqid(conn);
934 req.flags = CTDB_IMMEDIATE_MIGRATION;
935 req.callid = CTDB_NULL_FUNC;
937 req.keylen = key.dsize;
939 DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
940 ctdb_packet_dump(&req.hdr);
942 iov[0].iov_base = &req;
943 iov[0].iov_len = offsetof(struct ctdb_req_call_old, data);
944 iov[1].iov_base = key.dptr;
945 iov[1].iov_len = key.dsize;
947 nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
948 if (nwritten == -1) {
949 DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
950 cluster_fatal("cluster dispatch daemon msg write error\n");
953 ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
955 DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
959 if (hdr->operation != CTDB_REPLY_CALL) {
960 DEBUG(0, ("received invalid reply\n"));
971 * Fetch a record and parse it
973 int ctdbd_parse(struct ctdbd_connection *conn, uint32_t db_id,
974 TDB_DATA key, bool local_copy,
975 void (*parser)(TDB_DATA key, TDB_DATA data,
979 struct ctdb_req_call_old req;
980 struct ctdb_req_header *hdr = NULL;
981 struct ctdb_reply_call_old *reply;
987 flags = local_copy ? CTDB_WANT_READONLY : 0;
991 req.hdr.length = offsetof(struct ctdb_req_call_old, data) + key.dsize;
992 req.hdr.ctdb_magic = CTDB_MAGIC;
993 req.hdr.ctdb_version = CTDB_PROTOCOL;
994 req.hdr.operation = CTDB_REQ_CALL;
995 req.hdr.reqid = ctdbd_next_reqid(conn);
997 req.callid = CTDB_FETCH_FUNC;
999 req.keylen = key.dsize;
1001 iov[0].iov_base = &req;
1002 iov[0].iov_len = offsetof(struct ctdb_req_call_old, data);
1003 iov[1].iov_base = key.dptr;
1004 iov[1].iov_len = key.dsize;
1006 nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
1007 if (nwritten == -1) {
1008 DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
1009 cluster_fatal("cluster dispatch daemon msg write error\n");
1012 ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
1014 DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
1018 if ((hdr == NULL) || (hdr->operation != CTDB_REPLY_CALL)) {
1019 DEBUG(0, ("received invalid reply\n"));
1023 reply = (struct ctdb_reply_call_old *)hdr;
1025 if (reply->datalen == 0) {
1027 * Treat an empty record as non-existing
1033 parser(key, make_tdb_data(&reply->data[0], reply->datalen),
1043 Traverse a ctdb database. This uses a kind-of hackish way to open a second
1044 connection to ctdbd to avoid the hairy recursive and async problems with
1048 int ctdbd_traverse(struct ctdbd_connection *master, uint32_t db_id,
1049 void (*fn)(TDB_DATA key, TDB_DATA data,
1050 void *private_data),
1053 struct ctdbd_connection *conn;
1056 struct ctdb_traverse_start t;
1060 ret = ctdbd_init_connection(NULL, master->sockname, master->timeout,
1064 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1070 t.srvid = conn->rand_srvid;
1071 t.reqid = ctdbd_next_reqid(conn);
1073 data.dptr = (uint8_t *)&t;
1074 data.dsize = sizeof(t);
1076 ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
1077 CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid,
1078 0, data, NULL, NULL, &cstatus);
1080 if ((ret != 0) || (cstatus != 0)) {
1081 DEBUG(0,("ctdbd_control failed: %s, %d\n", strerror(ret),
1086 * We need a mapping here
1095 struct ctdb_req_header *hdr = NULL;
1096 struct ctdb_req_message_old *m;
1097 struct ctdb_rec_data_old *d;
1099 ret = ctdb_read_packet(conn->fd, conn->timeout, conn, &hdr);
1101 DEBUG(0, ("ctdb_read_packet failed: %s\n",
1103 cluster_fatal("ctdbd died\n");
1106 if (hdr->operation != CTDB_REQ_MESSAGE) {
1107 DEBUG(0, ("Got operation %u, expected a message\n",
1108 (unsigned)hdr->operation));
1113 m = (struct ctdb_req_message_old *)hdr;
1114 d = (struct ctdb_rec_data_old *)&m->data[0];
1115 if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1116 DEBUG(0, ("Got invalid traverse data of length %d\n",
1122 key.dsize = d->keylen;
1123 key.dptr = &d->data[0];
1124 data.dsize = d->datalen;
1125 data.dptr = &d->data[d->keylen];
1127 if (key.dsize == 0 && data.dsize == 0) {
1128 /* end of traverse */
1133 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1134 DEBUG(0, ("Got invalid ltdb header length %d\n",
1139 data.dsize -= sizeof(struct ctdb_ltdb_header);
1140 data.dptr += sizeof(struct ctdb_ltdb_header);
1143 fn(key, data, private_data);
1150 This is used to canonicalize a ctdb_sock_addr structure.
1152 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
1153 struct sockaddr_storage *out)
1155 memcpy(out, in, sizeof (*out));
1158 if (in->ss_family == AF_INET6) {
1159 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1160 const struct sockaddr_in6 *in6 =
1161 (const struct sockaddr_in6 *)in;
1162 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1163 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1164 memset(out, 0, sizeof(*out));
1165 #ifdef HAVE_SOCK_SIN_LEN
1166 out4->sin_len = sizeof(*out);
1168 out4->sin_family = AF_INET;
1169 out4->sin_port = in6->sin6_port;
1170 memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr[12], 4);
1177 * Register us as a server for a particular tcp connection
1180 int ctdbd_register_ips(struct ctdbd_connection *conn,
1181 const struct sockaddr_storage *_server,
1182 const struct sockaddr_storage *_client,
1183 int (*cb)(uint32_t src_vnn, uint32_t dst_vnn,
1185 const uint8_t *msg, size_t msglen,
1186 void *private_data),
1189 struct ctdb_control_tcp_addr p;
1190 TDB_DATA data = { .dptr = (uint8_t *)&p, .dsize = sizeof(p) };
1192 struct sockaddr_storage client;
1193 struct sockaddr_storage server;
1196 * Only one connection so far
1199 smbd_ctdb_canonicalize_ip(_client, &client);
1200 smbd_ctdb_canonicalize_ip(_server, &server);
1202 switch (client.ss_family) {
1204 memcpy(&p.dest.ip, &server, sizeof(p.dest.ip));
1205 memcpy(&p.src.ip, &client, sizeof(p.src.ip));
1208 memcpy(&p.dest.ip6, &server, sizeof(p.dest.ip6));
1209 memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
1216 * We want to be told about IP releases
1219 ret = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP,
1226 * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1227 * can send an extra ack to trigger a reset for our client, so it
1228 * immediately reconnects
1230 ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
1231 CTDB_CONTROL_TCP_CLIENT, 0,
1232 CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL,
1241 call a control on the local node
1243 int ctdbd_control_local(struct ctdbd_connection *conn, uint32_t opcode,
1244 uint64_t srvid, uint32_t flags, TDB_DATA data,
1245 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1248 return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data,
1249 mem_ctx, outdata, cstatus);
1252 int ctdb_watch_us(struct ctdbd_connection *conn)
1254 struct ctdb_client_notify_register reg_data;
1259 reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1261 reg_data.notify_data[0] = 0;
1263 struct_len = offsetof(struct ctdb_client_notify_register,
1264 notify_data) + reg_data.len;
1266 ret = ctdbd_control_local(
1267 conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
1268 make_tdb_data((uint8_t *)®_data, struct_len),
1269 NULL, NULL, &cstatus);
1271 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1277 int ctdb_unwatch(struct ctdbd_connection *conn)
1279 struct ctdb_client_notify_deregister dereg_data;
1283 dereg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1285 ret = ctdbd_control_local(
1286 conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
1287 make_tdb_data((uint8_t *)&dereg_data, sizeof(dereg_data)),
1288 NULL, NULL, &cstatus);
1290 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1296 int ctdbd_probe(const char *sockname, int timeout)
1299 * Do a very early check if ctdbd is around to avoid an abort and core
1302 struct ctdbd_connection *conn = NULL;
1305 ret = ctdbd_messaging_connection(talloc_tos(), sockname, timeout,
1309 * We only care if we can connect.