/*
Unix SMB/CIFS implementation.
Samba internal messaging functions
Copyright (C) 2007 by Volker Lendecke
Copyright (C) 2007 by Andrew Tridgell
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include "includes.h"
#include "util_tdb.h"
#include "serverid.h"
#include "ctdbd_conn.h"
#ifdef CLUSTER_SUPPORT
#include "ctdb_packet.h"
#include "messages.h"
/*
* It is not possible to include ctdb.h and tdb_compat.h (included via
* some other include above) without warnings. This fixes those
* warnings.
*/
#ifdef typesafe_cb
#undef typesafe_cb
#endif
#ifdef typesafe_cb_preargs
#undef typesafe_cb_preargs
#endif
#ifdef typesafe_cb_postargs
#undef typesafe_cb_postargs
#endif
/* paths to these include files come from --with-ctdb= in configure */
#include "ctdb.h"
#include "ctdb_private.h"
struct ctdbd_connection {
struct messaging_context *msg_ctx;
uint32_t reqid;
uint32_t our_vnn;
uint64_t rand_srvid;
struct ctdb_packet_context *pkt;
struct fd_event *fde;
void (*release_ip_handler)(const char *ip_addr, void *private_data);
void *release_ip_priv;
};
static uint32_t ctdbd_next_reqid(struct ctdbd_connection *conn)
{
conn->reqid += 1;
if (conn->reqid == 0) {
conn->reqid += 1;
}
return conn->reqid;
}
static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
uint32_t vnn, uint32_t opcode,
uint64_t srvid, uint32_t flags, TDB_DATA data,
TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
int *cstatus);
/*
* exit on fatal communications errors with the ctdbd daemon
*/
static void cluster_fatal(const char *why)
{
DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
/* we don't use smb_panic() as we don't want to delay to write
a core file. We need to release this process id immediately
so that someone else can take over without getting sharing
violations */
_exit(1);
}
/*
*
*/
static void ctdb_packet_dump(struct ctdb_req_header *hdr)
{
if (DEBUGLEVEL < 11) {
return;
}
DEBUGADD(11, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
(int)hdr->length, (int)hdr->ctdb_magic,
(int)hdr->ctdb_version, (int)hdr->generation,
(int)hdr->operation, (int)hdr->reqid));
}
/*
* Register a srvid with ctdbd
*/
NTSTATUS register_with_ctdbd(struct ctdbd_connection *conn, uint64_t srvid)
{
int cstatus;
return ctdbd_control(conn, CTDB_CURRENT_NODE,
CTDB_CONTROL_REGISTER_SRVID, srvid, 0,
tdb_null, NULL, NULL, &cstatus);
}
/*
* get our vnn from the cluster
*/
static NTSTATUS get_cluster_vnn(struct ctdbd_connection *conn, uint32_t *vnn)
{
int32_t cstatus=-1;
NTSTATUS status;
status = ctdbd_control(conn,
CTDB_CURRENT_NODE, CTDB_CONTROL_GET_PNN, 0, 0,
tdb_null, NULL, NULL, &cstatus);
if (!NT_STATUS_IS_OK(status)) {
cluster_fatal("ctdbd_control failed\n");
}
*vnn = (uint32_t)cstatus;
return status;
}
/*
* Are we active (i.e. not banned or stopped?)
*/
static bool ctdbd_working(struct ctdbd_connection *conn, uint32_t vnn)
{
int32_t cstatus=-1;
NTSTATUS status;
TDB_DATA outdata;
struct ctdb_node_map *m;
uint32_t failure_flags;
bool ret = false;
int i;
status = ctdbd_control(conn, CTDB_CURRENT_NODE,
CTDB_CONTROL_GET_NODEMAP, 0, 0,
tdb_null, talloc_tos(), &outdata, &cstatus);
if (!NT_STATUS_IS_OK(status)) {
cluster_fatal("ctdbd_control failed\n");
}
if ((cstatus != 0) || (outdata.dptr == NULL)) {
DEBUG(2, ("Received invalid ctdb data\n"));
return false;
}
m = (struct ctdb_node_map *)outdata.dptr;
for (i=0; inum; i++) {
if (vnn == m->nodes[i].pnn) {
break;
}
}
if (i == m->num) {
DEBUG(2, ("Did not find ourselves (node %d) in nodemap\n",
(int)vnn));
goto fail;
}
failure_flags = NODE_FLAGS_BANNED | NODE_FLAGS_DISCONNECTED
| NODE_FLAGS_PERMANENTLY_DISABLED | NODE_FLAGS_STOPPED;
if ((m->nodes[i].flags & failure_flags) != 0) {
DEBUG(2, ("Node has status %x, not active\n",
(int)m->nodes[i].flags));
goto fail;
}
ret = true;
fail:
TALLOC_FREE(outdata.dptr);
return ret;
}
uint32_t ctdbd_vnn(const struct ctdbd_connection *conn)
{
return conn->our_vnn;
}
/*
* Get us a ctdb connection
*/
static NTSTATUS ctdbd_connect(TALLOC_CTX *mem_ctx,
struct ctdb_packet_context **presult)
{
struct ctdb_packet_context *result;
const char *sockname = lp_ctdbd_socket();
struct sockaddr_un addr;
int fd;
socklen_t salen;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd == -1) {
DEBUG(3, ("Could not create socket: %s\n", strerror(errno)));
return map_nt_error_from_unix(errno);
}
ZERO_STRUCT(addr);
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, sockname, sizeof(addr.sun_path));
salen = sizeof(struct sockaddr_un);
if (connect(fd, (struct sockaddr *)(void *)&addr, salen) == -1) {
DEBUG(1, ("connect(%s) failed: %s\n", sockname,
strerror(errno)));
close(fd);
return map_nt_error_from_unix(errno);
}
if (!(result = ctdb_packet_init(mem_ctx, fd))) {
close(fd);
return NT_STATUS_NO_MEMORY;
}
*presult = result;
return NT_STATUS_OK;
}
/*
* Do we have a complete ctdb packet in the queue?
*/
static bool ctdb_req_complete(const uint8_t *buf, size_t available,
size_t *length,
void *private_data)
{
uint32_t msglen;
if (available < sizeof(msglen)) {
return False;
}
msglen = *((const uint32_t *)buf);
DEBUG(11, ("msglen = %d\n", msglen));
if (msglen < sizeof(struct ctdb_req_header)) {
DEBUG(0, ("Got invalid msglen: %d, expected at least %d for "
"the req_header\n", (int)msglen,
(int)sizeof(struct ctdb_req_header)));
cluster_fatal("ctdbd protocol error\n");
}
if (available < msglen) {
return false;
}
*length = msglen;
return true;
}
/*
* State necessary to defer an incoming message while we are waiting for a
* ctdb reply.
*/
struct deferred_msg_state {
struct messaging_context *msg_ctx;
struct messaging_rec *rec;
};
/*
* Timed event handler for the deferred message
*/
static void deferred_message_dispatch(struct event_context *event_ctx,
struct timed_event *te,
struct timeval now,
void *private_data)
{
struct deferred_msg_state *state = talloc_get_type_abort(
private_data, struct deferred_msg_state);
messaging_dispatch_rec(state->msg_ctx, state->rec);
TALLOC_FREE(state);
TALLOC_FREE(te);
}
struct req_pull_state {
TALLOC_CTX *mem_ctx;
DATA_BLOB req;
};
/*
* Pull a ctdb request out of the incoming ctdb_packet queue
*/
static NTSTATUS ctdb_req_pull(uint8_t *buf, size_t length,
void *private_data)
{
struct req_pull_state *state = (struct req_pull_state *)private_data;
state->req.data = talloc_move(state->mem_ctx, &buf);
state->req.length = length;
return NT_STATUS_OK;
}
/*
* Fetch a messaging_rec from an incoming ctdb style message
*/
static struct messaging_rec *ctdb_pull_messaging_rec(TALLOC_CTX *mem_ctx,
size_t overall_length,
struct ctdb_req_message *msg)
{
struct messaging_rec *result;
DATA_BLOB blob;
enum ndr_err_code ndr_err;
if ((overall_length < offsetof(struct ctdb_req_message, data))
|| (overall_length
< offsetof(struct ctdb_req_message, data) + msg->datalen)) {
cluster_fatal("got invalid msg length");
}
if (!(result = talloc(mem_ctx, struct messaging_rec))) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
blob = data_blob_const(msg->data, msg->datalen);
ndr_err = ndr_pull_struct_blob(
&blob, result, result,
(ndr_pull_flags_fn_t)ndr_pull_messaging_rec);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0, ("ndr_pull_struct_blob failed: %s\n",
ndr_errstr(ndr_err)));
TALLOC_FREE(result);
return NULL;
}
if (DEBUGLEVEL >= 11) {
DEBUG(11, ("ctdb_pull_messaging_rec:\n"));
NDR_PRINT_DEBUG(messaging_rec, result);
}
return result;
}
static NTSTATUS ctdb_packet_fd_read_sync(struct ctdb_packet_context *ctx)
{
int timeout = lp_ctdb_timeout();
if (timeout == 0) {
timeout = -1;
}
return ctdb_packet_fd_read_sync_timeout(ctx, timeout);
}
/*
* Read a full ctdbd request. If we have a messaging context, defer incoming
* messages that might come in between.
*/
static NTSTATUS ctdb_read_req(struct ctdbd_connection *conn, uint32_t reqid,
TALLOC_CTX *mem_ctx, void *result)
{
struct ctdb_req_header *hdr;
struct req_pull_state state;
NTSTATUS status;
next_pkt:
ZERO_STRUCT(state);
state.mem_ctx = mem_ctx;
while (!ctdb_packet_handler(conn->pkt, ctdb_req_complete,
ctdb_req_pull, &state, &status)) {
/*
* Not enough data
*/
status = ctdb_packet_fd_read_sync(conn->pkt);
if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_BUSY)) {
/* EAGAIN */
continue;
} else if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
/* EAGAIN */
continue;
}
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
cluster_fatal("ctdbd died\n");
}
}
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Could not read ctdb_packet: %s\n", nt_errstr(status)));
cluster_fatal("ctdbd died\n");
}
hdr = (struct ctdb_req_header *)state.req.data;
DEBUG(11, ("Received ctdb packet\n"));
ctdb_packet_dump(hdr);
if (hdr->operation == CTDB_REQ_MESSAGE) {
struct timed_event *evt;
struct deferred_msg_state *msg_state;
struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
if (conn->msg_ctx == NULL) {
DEBUG(1, ("Got a message without having a msg ctx, "
"dropping msg %llu\n",
(long long unsigned)msg->srvid));
goto next_pkt;
}
if ((conn->release_ip_handler != NULL)
&& (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
/* must be dispatched immediately */
DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
conn->release_ip_handler((const char *)msg->data,
conn->release_ip_priv);
TALLOC_FREE(hdr);
goto next_pkt;
}
if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
|| (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)) {
DEBUG(1, ("ctdb_read_req: Got %s message\n",
(msg->srvid == CTDB_SRVID_RECONFIGURE)
? "cluster reconfigure" : "SAMBA_NOTIFY"));
messaging_send(conn->msg_ctx,
messaging_server_id(conn->msg_ctx),
MSG_SMB_BRL_VALIDATE, &data_blob_null);
messaging_send(conn->msg_ctx,
messaging_server_id(conn->msg_ctx),
MSG_DBWRAP_G_LOCK_RETRY,
&data_blob_null);
TALLOC_FREE(hdr);
goto next_pkt;
}
msg_state = talloc(NULL, struct deferred_msg_state);
if (msg_state == NULL) {
DEBUG(0, ("talloc failed\n"));
TALLOC_FREE(hdr);
goto next_pkt;
}
if (!(msg_state->rec = ctdb_pull_messaging_rec(
msg_state, state.req.length, msg))) {
DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
TALLOC_FREE(msg_state);
TALLOC_FREE(hdr);
goto next_pkt;
}
TALLOC_FREE(hdr);
msg_state->msg_ctx = conn->msg_ctx;
/*
* We're waiting for a call reply, but an async message has
* crossed. Defer dispatching to the toplevel event loop.
*/
evt = event_add_timed(conn->msg_ctx->event_ctx,
conn->msg_ctx->event_ctx,
timeval_zero(),
deferred_message_dispatch,
msg_state);
if (evt == NULL) {
DEBUG(0, ("event_add_timed failed\n"));
TALLOC_FREE(msg_state);
TALLOC_FREE(hdr);
goto next_pkt;
}
goto next_pkt;
}
if ((reqid != 0) && (hdr->reqid != reqid)) {
/* we got the wrong reply */
DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
"been %u\n", hdr->reqid, reqid));
TALLOC_FREE(hdr);
goto next_pkt;
}
*((void **)result) = talloc_move(mem_ctx, &hdr);
return NT_STATUS_OK;
}
/*
* Get us a ctdbd connection
*/
static NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
struct ctdbd_connection **pconn)
{
struct ctdbd_connection *conn;
NTSTATUS status;
if (!(conn = talloc_zero(mem_ctx, struct ctdbd_connection))) {
DEBUG(0, ("talloc failed\n"));
return NT_STATUS_NO_MEMORY;
}
status = ctdbd_connect(conn, &conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status)));
goto fail;
}
status = get_cluster_vnn(conn, &conn->our_vnn);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status)));
goto fail;
}
if (!ctdbd_working(conn, conn->our_vnn)) {
DEBUG(2, ("Node is not working, can not connect\n"));
status = NT_STATUS_INTERNAL_DB_ERROR;
goto fail;
}
generate_random_buffer((unsigned char *)&conn->rand_srvid,
sizeof(conn->rand_srvid));
status = register_with_ctdbd(conn, conn->rand_srvid);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("Could not register random srvid: %s\n",
nt_errstr(status)));
goto fail;
}
*pconn = conn;
return NT_STATUS_OK;
fail:
TALLOC_FREE(conn);
return status;
}
/*
* Get us a ctdbd connection and register us as a process
*/
NTSTATUS ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
struct ctdbd_connection **pconn)
{
struct ctdbd_connection *conn;
NTSTATUS status;
status = ctdbd_init_connection(mem_ctx, &conn);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
status = register_with_ctdbd(conn, (uint64_t)getpid());
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
status = register_with_ctdbd(conn, MSG_SRVID_SAMBA);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
status = register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
*pconn = conn;
return NT_STATUS_OK;
fail:
TALLOC_FREE(conn);
return status;
}
struct messaging_context *ctdb_conn_msg_ctx(struct ctdbd_connection *conn)
{
return conn->msg_ctx;
}
int ctdbd_conn_get_fd(struct ctdbd_connection *conn)
{
return ctdb_packet_get_fd(conn->pkt);
}
/*
* Packet handler to receive and handle a ctdb message
*/
static NTSTATUS ctdb_handle_message(uint8_t *buf, size_t length,
void *private_data)
{
struct ctdbd_connection *conn = talloc_get_type_abort(
private_data, struct ctdbd_connection);
struct ctdb_req_message *msg;
struct messaging_rec *msg_rec;
msg = (struct ctdb_req_message *)buf;
if (msg->hdr.operation != CTDB_REQ_MESSAGE) {
DEBUG(0, ("Received async msg of type %u, discarding\n",
msg->hdr.operation));
TALLOC_FREE(buf);
return NT_STATUS_INVALID_PARAMETER;
}
if ((conn->release_ip_handler != NULL)
&& (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
/* must be dispatched immediately */
DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
conn->release_ip_handler((const char *)msg->data,
conn->release_ip_priv);
TALLOC_FREE(buf);
return NT_STATUS_OK;
}
SMB_ASSERT(conn->msg_ctx != NULL);
if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
|| (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)){
DEBUG(0,("Got cluster reconfigure message\n"));
/*
* when the cluster is reconfigured or someone of the
* family has passed away (SAMBA_NOTIFY), we need to
* clean the brl database
*/
messaging_send(conn->msg_ctx,
messaging_server_id(conn->msg_ctx),
MSG_SMB_BRL_VALIDATE, &data_blob_null);
messaging_send(conn->msg_ctx,
messaging_server_id(conn->msg_ctx),
MSG_DBWRAP_G_LOCK_RETRY,
&data_blob_null);
TALLOC_FREE(buf);
return NT_STATUS_OK;
}
/* only messages to our pid or the broadcast are valid here */
if (msg->srvid != getpid() && msg->srvid != MSG_SRVID_SAMBA) {
DEBUG(0,("Got unexpected message with srvid=%llu\n",
(unsigned long long)msg->srvid));
TALLOC_FREE(buf);
return NT_STATUS_OK;
}
if (!(msg_rec = ctdb_pull_messaging_rec(NULL, length, msg))) {
DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
TALLOC_FREE(buf);
return NT_STATUS_NO_MEMORY;
}
messaging_dispatch_rec(conn->msg_ctx, msg_rec);
TALLOC_FREE(msg_rec);
TALLOC_FREE(buf);
return NT_STATUS_OK;
}
/*
* The ctdbd socket is readable asynchronuously
*/
static void ctdbd_socket_handler(struct event_context *event_ctx,
struct fd_event *event,
uint16 flags,
void *private_data)
{
struct ctdbd_connection *conn = talloc_get_type_abort(
private_data, struct ctdbd_connection);
NTSTATUS status;
status = ctdb_packet_fd_read(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
cluster_fatal("ctdbd died\n");
}
while (ctdb_packet_handler(conn->pkt, ctdb_req_complete,
ctdb_handle_message, conn, &status)) {
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("could not handle incoming message: %s\n",
nt_errstr(status)));
}
}
}
/*
* Prepare a ctdbd connection to receive messages
*/
NTSTATUS ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
struct messaging_context *msg_ctx)
{
SMB_ASSERT(conn->msg_ctx == NULL);
SMB_ASSERT(conn->fde == NULL);
if (!(conn->fde = event_add_fd(msg_ctx->event_ctx, conn,
ctdb_packet_get_fd(conn->pkt),
EVENT_FD_READ,
ctdbd_socket_handler,
conn))) {
DEBUG(0, ("event_add_fd failed\n"));
return NT_STATUS_NO_MEMORY;
}
conn->msg_ctx = msg_ctx;
return NT_STATUS_OK;
}
/*
* Send a messaging message across a ctdbd
*/
NTSTATUS ctdbd_messaging_send(struct ctdbd_connection *conn,
uint32_t dst_vnn, uint64_t dst_srvid,
struct messaging_rec *msg)
{
DATA_BLOB blob;
NTSTATUS status;
enum ndr_err_code ndr_err;
ndr_err = ndr_push_struct_blob(
&blob, talloc_tos(), msg,
(ndr_push_flags_fn_t)ndr_push_messaging_rec);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
ndr_errstr(ndr_err)));
return ndr_map_error2ntstatus(ndr_err);
}
status = ctdbd_messaging_send_blob(conn, dst_vnn, dst_srvid,
blob.data, blob.length);
TALLOC_FREE(blob.data);
return NT_STATUS_OK;
}
NTSTATUS ctdbd_messaging_send_blob(struct ctdbd_connection *conn,
uint32_t dst_vnn, uint64_t dst_srvid,
const uint8_t *buf, size_t buflen)
{
struct ctdb_req_message r;
NTSTATUS status;
r.hdr.length = offsetof(struct ctdb_req_message, data) + buflen;
r.hdr.ctdb_magic = CTDB_MAGIC;
r.hdr.ctdb_version = CTDB_VERSION;
r.hdr.generation = 1;
r.hdr.operation = CTDB_REQ_MESSAGE;
r.hdr.destnode = dst_vnn;
r.hdr.srcnode = conn->our_vnn;
r.hdr.reqid = 0;
r.srvid = dst_srvid;
r.datalen = buflen;
DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
ctdb_packet_dump(&r.hdr);
status = ctdb_packet_send(
conn->pkt, 2,
data_blob_const(&r, offsetof(struct ctdb_req_message, data)),
data_blob_const(buf, buflen));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
return status;
}
status = ctdb_packet_flush(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
cluster_fatal("cluster dispatch daemon msg write error\n");
}
return NT_STATUS_OK;
}
/*
* send/recv a generic ctdb control message
*/
static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
uint32_t vnn, uint32_t opcode,
uint64_t srvid, uint32_t flags,
TDB_DATA data,
TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
int *cstatus)
{
struct ctdb_req_control req;
struct ctdb_reply_control *reply = NULL;
struct ctdbd_connection *new_conn = NULL;
NTSTATUS status;
if (conn == NULL) {
status = ctdbd_init_connection(NULL, &new_conn);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("Could not init temp connection: %s\n",
nt_errstr(status)));
goto fail;
}
conn = new_conn;
}
ZERO_STRUCT(req);
req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
req.hdr.ctdb_magic = CTDB_MAGIC;
req.hdr.ctdb_version = CTDB_VERSION;
req.hdr.operation = CTDB_REQ_CONTROL;
req.hdr.reqid = ctdbd_next_reqid(conn);
req.hdr.destnode = vnn;
req.opcode = opcode;
req.srvid = srvid;
req.datalen = data.dsize;
req.flags = flags;
DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
ctdb_packet_dump(&req.hdr);
status = ctdb_packet_send(
conn->pkt, 2,
data_blob_const(&req, offsetof(struct ctdb_req_control, data)),
data_blob_const(data.dptr, data.dsize));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
goto fail;
}
status = ctdb_packet_flush(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
cluster_fatal("cluster dispatch daemon control write error\n");
}
if (flags & CTDB_CTRL_FLAG_NOREPLY) {
TALLOC_FREE(new_conn);
if (cstatus) {
*cstatus = 0;
}
return NT_STATUS_OK;
}
status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
goto fail;
}
if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
DEBUG(0, ("received invalid reply\n"));
goto fail;
}
if (outdata) {
if (!(outdata->dptr = (uint8 *)talloc_memdup(
mem_ctx, reply->data, reply->datalen))) {
TALLOC_FREE(reply);
return NT_STATUS_NO_MEMORY;
}
outdata->dsize = reply->datalen;
}
if (cstatus) {
(*cstatus) = reply->status;
}
status = NT_STATUS_OK;
fail:
TALLOC_FREE(new_conn);
TALLOC_FREE(reply);
return status;
}
/*
* see if a remote process exists
*/
bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32_t vnn, pid_t pid)
{
struct server_id id;
bool result;
id.pid = pid;
id.vnn = vnn;
if (!ctdb_processes_exist(conn, &id, 1, &result)) {
DEBUG(10, ("ctdb_processes_exist failed\n"));
return false;
}
return result;
}
bool ctdb_processes_exist(struct ctdbd_connection *conn,
const struct server_id *pids, int num_pids,
bool *results)
{
TALLOC_CTX *frame = talloc_stackframe();
int i, num_received;
NTSTATUS status;
uint32_t *reqids;
bool result = false;
reqids = talloc_array(talloc_tos(), uint32_t, num_pids);
if (reqids == NULL) {
goto fail;
}
for (i=0; ipkt, 2,
data_blob_const(
&req, offsetof(struct ctdb_req_control, data)),
data_blob_const(&pid, sizeof(pid)));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdb_packet_send failed: %s\n",
nt_errstr(status)));
goto fail;
}
}
status = ctdb_packet_flush(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdb_packet_flush failed: %s\n",
nt_errstr(status)));
goto fail;
}
num_received = 0;
while (num_received < num_pids) {
struct ctdb_reply_control *reply = NULL;
uint32_t reqid;
status = ctdb_read_req(conn, 0, talloc_tos(), (void *)&reply);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdb_read_req failed: %s\n",
nt_errstr(status)));
goto fail;
}
if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
DEBUG(10, ("Received invalid reply\n"));
goto fail;
}
reqid = reply->hdr.reqid;
DEBUG(10, ("Received reqid %d\n", (int)reqid));
for (i=0; istatus) == 0);
TALLOC_FREE(reply);
num_received += 1;
}
result = true;
fail:
TALLOC_FREE(frame);
return result;
}
struct ctdb_vnn_list {
uint32_t vnn;
uint32_t reqid;
unsigned num_srvids;
unsigned num_filled;
uint64_t *srvids;
unsigned *pid_indexes;
};
/*
* Get a list of all vnns mentioned in a list of
* server_ids. vnn_indexes tells where in the vnns array we have to
* place the pids.
*/
static bool ctdb_collect_vnns(TALLOC_CTX *mem_ctx,
const struct server_id *pids, unsigned num_pids,
struct ctdb_vnn_list **pvnns,
unsigned *pnum_vnns)
{
struct ctdb_vnn_list *vnns = NULL;
unsigned *vnn_indexes = NULL;
unsigned i, num_vnns = 0;
vnn_indexes = talloc_array(mem_ctx, unsigned, num_pids);
if (vnn_indexes == NULL) {
DEBUG(1, ("talloc_array failed\n"));
goto fail;
}
for (i=0; isrvids = talloc_array(vnns, uint64_t, vnn->num_srvids);
if (vnn->srvids == NULL) {
DEBUG(1, ("talloc_array failed\n"));
goto fail;
}
vnn->pid_indexes = talloc_array(vnns, unsigned,
vnn->num_srvids);
if (vnn->pid_indexes == NULL) {
DEBUG(1, ("talloc_array failed\n"));
goto fail;
}
}
for (i=0; isrvids[vnn->num_filled] = pids[i].unique_id;
vnn->pid_indexes[vnn->num_filled] = i;
vnn->num_filled += 1;
}
TALLOC_FREE(vnn_indexes);
*pvnns = vnns;
*pnum_vnns = num_vnns;
return true;
fail:
TALLOC_FREE(vnns);
TALLOC_FREE(vnn_indexes);
return false;
}
#ifdef HAVE_CTDB_CONTROL_CHECK_SRVIDS_DECL
bool ctdb_serverids_exist(struct ctdbd_connection *conn,
const struct server_id *pids, unsigned num_pids,
bool *results)
{
unsigned i, num_received;
NTSTATUS status;
struct ctdb_vnn_list *vnns = NULL;
unsigned num_vnns;
bool result = false;
if (!ctdb_collect_vnns(talloc_tos(), pids, num_pids,
&vnns, &num_vnns)) {
DEBUG(1, ("ctdb_collect_vnns failed\n"));
goto fail;
}
for (i=0; ireqid = ctdbd_next_reqid(conn);
ZERO_STRUCT(req);
DEBUG(10, ("Requesting VNN %d, reqid=%d, num_srvids=%u\n",
(int)vnn->vnn, (int)vnn->reqid, vnn->num_srvids));
req.hdr.length = offsetof(struct ctdb_req_control, data);
req.hdr.ctdb_magic = CTDB_MAGIC;
req.hdr.ctdb_version = CTDB_VERSION;
req.hdr.operation = CTDB_REQ_CONTROL;
req.hdr.reqid = vnn->reqid;
req.hdr.destnode = vnn->vnn;
req.opcode = CTDB_CONTROL_CHECK_SRVIDS;
req.srvid = 0;
req.datalen = sizeof(uint64_t) * vnn->num_srvids;
req.hdr.length += req.datalen;
req.flags = 0;
DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
ctdb_packet_dump(&req.hdr);
status = ctdb_packet_send(
conn->pkt, 2,
data_blob_const(
&req, offsetof(struct ctdb_req_control,
data)),
data_blob_const(vnn->srvids, req.datalen));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("ctdb_packet_send failed: %s\n",
nt_errstr(status)));
goto fail;
}
}
status = ctdb_packet_flush(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("ctdb_packet_flush failed: %s\n",
nt_errstr(status)));
goto fail;
}
num_received = 0;
while (num_received < num_vnns) {
struct ctdb_reply_control *reply = NULL;
struct ctdb_vnn_list *vnn;
uint32_t reqid;
uint8_t *reply_data;
status = ctdb_read_req(conn, 0, talloc_tos(), (void *)&reply);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("ctdb_read_req failed: %s\n",
nt_errstr(status)));
goto fail;
}
if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
DEBUG(1, ("Received invalid reply %u\n",
(unsigned)reply->hdr.operation));
goto fail;
}
reqid = reply->hdr.reqid;
DEBUG(10, ("Received reqid %d\n", (int)reqid));
for (i=0; inum_srvids %u, datalen %u\n",
(unsigned)vnn->vnn, vnn->num_srvids,
(unsigned)reply->datalen));
if (reply->datalen >= ((vnn->num_srvids+7)/8)) {
/*
* Got a real reply
*/
reply_data = reply->data;
} else {
/*
* Got an error reply
*/
DEBUG(1, ("Received short reply len %d, status %u, "
"errorlen %u\n",
(unsigned)reply->datalen,
(unsigned)reply->status,
(unsigned)reply->errorlen));
dump_data(1, reply->data, reply->errorlen);
/*
* This will trigger everything set to false
*/
reply_data = NULL;
}
for (i=0; inum_srvids; i++) {
int idx = vnn->pid_indexes[i];
if (pids[i].unique_id ==
SERVERID_UNIQUE_ID_NOT_TO_VERIFY) {
results[idx] = true;
continue;
}
results[idx] =
(reply_data != NULL) &&
((reply_data[i/8] & (1<<(i%8))) != 0);
}
TALLOC_FREE(reply);
num_received += 1;
}
result = true;
fail:
TALLOC_FREE(vnns);
return result;
}
#endif /* HAVE_CTDB_CONTROL_CHECK_SRVIDS_DECL */
/*
* Get a db path
*/
char *ctdbd_dbpath(struct ctdbd_connection *conn,
TALLOC_CTX *mem_ctx, uint32_t db_id)
{
NTSTATUS status;
TDB_DATA data;
int32_t cstatus;
data.dptr = (uint8_t*)&db_id;
data.dsize = sizeof(db_id);
status = ctdbd_control(conn, CTDB_CURRENT_NODE,
CTDB_CONTROL_GETDBPATH, 0, 0, data,
mem_ctx, &data, &cstatus);
if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
return NULL;
}
return (char *)data.dptr;
}
/*
* attach to a ctdb database
*/
NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
const char *name, uint32_t *db_id, int tdb_flags)
{
NTSTATUS status;
TDB_DATA data;
int32_t cstatus;
bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
data = string_term_tdb_data(name);
status = ctdbd_control(conn, CTDB_CURRENT_NODE,
persistent
? CTDB_CONTROL_DB_ATTACH_PERSISTENT
: CTDB_CONTROL_DB_ATTACH,
tdb_flags, 0, data, NULL, &data, &cstatus);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, (__location__ " ctdb_control for db_attach "
"failed: %s\n", nt_errstr(status)));
return status;
}
if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
return NT_STATUS_INTERNAL_ERROR;
}
*db_id = *(uint32_t *)data.dptr;
talloc_free(data.dptr);
if (!(tdb_flags & TDB_SEQNUM)) {
return NT_STATUS_OK;
}
data.dptr = (uint8_t *)db_id;
data.dsize = sizeof(*db_id);
status = ctdbd_control(conn, CTDB_CURRENT_NODE,
CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
NULL, NULL, &cstatus);
if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
DEBUG(0,(__location__ " ctdb_control for enable seqnum "
"failed\n"));
return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
status;
}
return NT_STATUS_OK;
}
/*
* force the migration of a record to this node
*/
NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32_t db_id,
TDB_DATA key)
{
struct ctdb_req_call req;
struct ctdb_reply_call *reply;
NTSTATUS status;
ZERO_STRUCT(req);
req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
req.hdr.ctdb_magic = CTDB_MAGIC;
req.hdr.ctdb_version = CTDB_VERSION;
req.hdr.operation = CTDB_REQ_CALL;
req.hdr.reqid = ctdbd_next_reqid(conn);
req.flags = CTDB_IMMEDIATE_MIGRATION;
req.callid = CTDB_NULL_FUNC;
req.db_id = db_id;
req.keylen = key.dsize;
DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
ctdb_packet_dump(&req.hdr);
status = ctdb_packet_send(
conn->pkt, 2,
data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
data_blob_const(key.dptr, key.dsize));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
return status;
}
status = ctdb_packet_flush(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
cluster_fatal("cluster dispatch daemon control write error\n");
}
status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
goto fail;
}
if (reply->hdr.operation != CTDB_REPLY_CALL) {
DEBUG(0, ("received invalid reply\n"));
status = NT_STATUS_INTERNAL_ERROR;
goto fail;
}
status = NT_STATUS_OK;
fail:
TALLOC_FREE(reply);
return status;
}
/*
* remotely fetch a record (read-only)
*/
NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32_t db_id,
TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data,
bool local_copy)
{
struct ctdb_req_call req;
struct ctdb_reply_call *reply;
NTSTATUS status;
uint32_t flags;
#ifdef HAVE_CTDB_WANT_READONLY_DECL
flags = local_copy ? CTDB_WANT_READONLY : 0;
#else
flags = 0;
#endif
ZERO_STRUCT(req);
req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
req.hdr.ctdb_magic = CTDB_MAGIC;
req.hdr.ctdb_version = CTDB_VERSION;
req.hdr.operation = CTDB_REQ_CALL;
req.hdr.reqid = ctdbd_next_reqid(conn);
req.flags = flags;
req.callid = CTDB_FETCH_FUNC;
req.db_id = db_id;
req.keylen = key.dsize;
status = ctdb_packet_send(
conn->pkt, 2,
data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
data_blob_const(key.dptr, key.dsize));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
return status;
}
status = ctdb_packet_flush(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
cluster_fatal("cluster dispatch daemon control write error\n");
}
status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
goto fail;
}
if (reply->hdr.operation != CTDB_REPLY_CALL) {
DEBUG(0, ("received invalid reply\n"));
status = NT_STATUS_INTERNAL_ERROR;
goto fail;
}
data->dsize = reply->datalen;
if (data->dsize == 0) {
data->dptr = NULL;
goto done;
}
data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
reply->datalen);
if (data->dptr == NULL) {
DEBUG(0, ("talloc failed\n"));
status = NT_STATUS_NO_MEMORY;
goto fail;
}
done:
status = NT_STATUS_OK;
fail:
TALLOC_FREE(reply);
return status;
}
struct ctdbd_traverse_state {
void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
void *private_data;
};
/*
* Handle a traverse record coming in on the ctdbd connection
*/
static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
void *private_data)
{
struct ctdbd_traverse_state *state =
(struct ctdbd_traverse_state *)private_data;
struct ctdb_req_message *m;
struct ctdb_rec_data *d;
TDB_DATA key, data;
m = (struct ctdb_req_message *)buf;
if (length < sizeof(*m) || m->hdr.length != length) {
DEBUG(0, ("Got invalid message of length %d\n", (int)length));
TALLOC_FREE(buf);
return NT_STATUS_UNEXPECTED_IO_ERROR;
}
d = (struct ctdb_rec_data *)&m->data[0];
if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
DEBUG(0, ("Got invalid traverse data of length %d\n",
(int)m->datalen));
TALLOC_FREE(buf);
return NT_STATUS_UNEXPECTED_IO_ERROR;
}
key.dsize = d->keylen;
key.dptr = &d->data[0];
data.dsize = d->datalen;
data.dptr = &d->data[d->keylen];
if (key.dsize == 0 && data.dsize == 0) {
/* end of traverse */
return NT_STATUS_END_OF_FILE;
}
if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
DEBUG(0, ("Got invalid ltdb header length %d\n",
(int)data.dsize));
TALLOC_FREE(buf);
return NT_STATUS_UNEXPECTED_IO_ERROR;
}
data.dsize -= sizeof(struct ctdb_ltdb_header);
data.dptr += sizeof(struct ctdb_ltdb_header);
if (state->fn) {
state->fn(key, data, state->private_data);
}
TALLOC_FREE(buf);
return NT_STATUS_OK;
}
/*
Traverse a ctdb database. This uses a kind-of hackish way to open a second
connection to ctdbd to avoid the hairy recursive and async problems with
everything in-line.
*/
NTSTATUS ctdbd_traverse(uint32_t db_id,
void (*fn)(TDB_DATA key, TDB_DATA data,
void *private_data),
void *private_data)
{
struct ctdbd_connection *conn;
NTSTATUS status;
TDB_DATA data;
struct ctdb_traverse_start t;
int cstatus;
struct ctdbd_traverse_state state;
become_root();
status = ctdbd_init_connection(NULL, &conn);
unbecome_root();
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("ctdbd_init_connection failed: %s\n",
nt_errstr(status)));
return status;
}
t.db_id = db_id;
t.srvid = conn->rand_srvid;
t.reqid = ctdbd_next_reqid(conn);
data.dptr = (uint8_t *)&t;
data.dsize = sizeof(t);
status = ctdbd_control(conn, CTDB_CURRENT_NODE,
CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
data, NULL, NULL, &cstatus);
if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
cstatus));
if (NT_STATUS_IS_OK(status)) {
/*
* We need a mapping here
*/
status = NT_STATUS_UNSUCCESSFUL;
}
goto done;
}
state.fn = fn;
state.private_data = private_data;
while (True) {
status = NT_STATUS_OK;
if (ctdb_packet_handler(conn->pkt, ctdb_req_complete,
ctdb_traverse_handler, &state, &status)) {
if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
status = NT_STATUS_OK;
break;
}
/*
* There might be more in the queue
*/
continue;
}
if (!NT_STATUS_IS_OK(status)) {
break;
}
status = ctdb_packet_fd_read_sync(conn->pkt);
if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
/*
* There might be more in the queue
*/
continue;
}
if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
status = NT_STATUS_OK;
break;
}
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("ctdb_packet_fd_read_sync failed: %s\n", nt_errstr(status)));
cluster_fatal("ctdbd died\n");
}
}
done:
TALLOC_FREE(conn);
return status;
}
/*
This is used to canonicalize a ctdb_sock_addr structure.
*/
static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
struct sockaddr_storage *out)
{
memcpy(out, in, sizeof (*out));
#ifdef HAVE_IPV6
if (in->ss_family == AF_INET6) {
const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
const struct sockaddr_in6 *in6 =
(const struct sockaddr_in6 *)in;
struct sockaddr_in *out4 = (struct sockaddr_in *)out;
if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
memset(out, 0, sizeof(*out));
#ifdef HAVE_SOCK_SIN_LEN
out4->sin_len = sizeof(*out);
#endif
out4->sin_family = AF_INET;
out4->sin_port = in6->sin6_port;
memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr[12], 4);
}
}
#endif
}
/*
* Register us as a server for a particular tcp connection
*/
NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
const struct sockaddr_storage *_server,
const struct sockaddr_storage *_client,
void (*release_ip_handler)(const char *ip_addr,
void *private_data),
void *private_data)
{
/*
* we still use ctdb_control_tcp for ipv4
* because we want to work against older ctdb
* versions at runtime
*/
struct ctdb_control_tcp p4;
#ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
struct ctdb_control_tcp_addr p;
#endif
TDB_DATA data;
NTSTATUS status;
struct sockaddr_storage client;
struct sockaddr_storage server;
/*
* Only one connection so far
*/
SMB_ASSERT(conn->release_ip_handler == NULL);
smbd_ctdb_canonicalize_ip(_client, &client);
smbd_ctdb_canonicalize_ip(_server, &server);
switch (client.ss_family) {
case AF_INET:
memcpy(&p4.dest, &server, sizeof(p4.dest));
memcpy(&p4.src, &client, sizeof(p4.src));
data.dptr = (uint8_t *)&p4;
data.dsize = sizeof(p4);
break;
#ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
case AF_INET6:
memcpy(&p.dest.ip6, &server, sizeof(p.dest.ip6));
memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
data.dptr = (uint8_t *)&p;
data.dsize = sizeof(p);
break;
#endif
default:
return NT_STATUS_INTERNAL_ERROR;
}
conn->release_ip_handler = release_ip_handler;
conn->release_ip_priv = private_data;
/*
* We want to be told about IP releases
*/
status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/*
* inform ctdb of our tcp connection, so if IP takeover happens ctdb
* can send an extra ack to trigger a reset for our client, so it
* immediately reconnects
*/
return ctdbd_control(conn, CTDB_CURRENT_NODE,
CTDB_CONTROL_TCP_CLIENT, 0,
CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
}
/*
* We want to handle reconfigure events
*/
NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
{
return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
}
/*
call a control on the local node
*/
NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32_t opcode,
uint64_t srvid, uint32_t flags, TDB_DATA data,
TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
int *cstatus)
{
return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
}
NTSTATUS ctdb_watch_us(struct ctdbd_connection *conn)
{
struct ctdb_client_notify_register reg_data;
size_t struct_len;
NTSTATUS status;
int cstatus;
reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
reg_data.len = 1;
reg_data.notify_data[0] = 0;
struct_len = offsetof(struct ctdb_client_notify_register,
notify_data) + reg_data.len;
status = ctdbd_control_local(
conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
make_tdb_data((uint8_t *)®_data, struct_len),
NULL, NULL, &cstatus);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("ctdbd_control_local failed: %s\n",
nt_errstr(status)));
}
return status;
}
NTSTATUS ctdb_unwatch(struct ctdbd_connection *conn)
{
struct ctdb_client_notify_deregister dereg_data;
NTSTATUS status;
int cstatus;
dereg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
status = ctdbd_control_local(
conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
make_tdb_data((uint8_t *)&dereg_data, sizeof(dereg_data)),
NULL, NULL, &cstatus);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("ctdbd_control_local failed: %s\n",
nt_errstr(status)));
}
return status;
}
#else
NTSTATUS ctdbd_messaging_send_blob(struct ctdbd_connection *conn,
uint32_t dst_vnn, uint64_t dst_srvid,
const uint8_t *buf, size_t buflen)
{
return NT_STATUS_NOT_IMPLEMENTED;
}
#endif