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s4-winrepl: Migrated the wins replication server to tsocket.

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Signed-off-by: Stefan Metzmacher <metze@samba.org>
This commit is contained in:
Andreas Schneider 2010-01-20 14:21:47 +01:00 committed by Stefan Metzmacher
parent 27ae935a8d
commit 3f946240fa
4 changed files with 317 additions and 144 deletions
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33
source4/wrepl_server/wrepl_in_call.c
View File

@ -31,6 +31,7 @@
#include "lib/ldb/include/ldb_errors.h"
#include "system/time.h"
#include "lib/util/tsort.h"
#include "lib/stream/packet.h" /* FIXME */
static NTSTATUS wreplsrv_in_start_association(struct wreplsrv_in_call *call)
{
@ -341,24 +342,32 @@ static NTSTATUS wreplsrv_in_update(struct wreplsrv_in_call *call)
struct wreplsrv_out_connection *wrepl_out;
struct wrepl_table *update_in = &call->req_packet.message.replication.info.table;
struct wreplsrv_in_update_state *update_state;
uint16_t fde_flags;
struct packet_context *packet;
DEBUG(2,("WREPL_REPL_UPDATE: partner[%s] initiator[%s] num_owners[%u]\n",
call->wreplconn->partner->address,
update_in->initiator, update_in->partner_count));
/*
* we need to flip the connection into a client connection
* and do a WREPL_REPL_SEND_REQUEST's on the that connection
* and then stop this connection
*/
fde_flags = event_get_fd_flags(wrepl_in->conn->event.fde);
talloc_free(wrepl_in->conn->event.fde);
wrepl_in->conn->event.fde = NULL;
update_state = talloc(wrepl_in, struct wreplsrv_in_update_state);
NT_STATUS_HAVE_NO_MEMORY(update_state);
/*
* We need to flip the connection into a client connection
* and do a WREPL_REPL_SEND_REQUEST's on the that connection
* and then stop this connection.
*/
packet = packet_init(wrepl_in);
if (packet == NULL) {
return NT_STATUS_NO_MEMORY;
}
/*
* TODO We can free the tstream here as we don't use it in the client
* yet.
*/
TALLOC_FREE(wrepl_in->send_queue);
TALLOC_FREE(wrepl_in->tstream);
wrepl_out = talloc(update_state, struct wreplsrv_out_connection);
NT_STATUS_HAVE_NO_MEMORY(wrepl_out);
wrepl_out->service = wrepl_in->service;
@ -368,11 +377,9 @@ static NTSTATUS wreplsrv_in_update(struct wreplsrv_in_call *call)
wrepl_out->sock = wrepl_socket_merge(wrepl_out,
wrepl_in->conn->event.ctx,
wrepl_in->conn->socket,
wrepl_in->packet);
packet);
NT_STATUS_HAVE_NO_MEMORY(wrepl_out->sock);
event_set_fd_flags(wrepl_out->sock->event.fde, fde_flags);
update_state->wrepl_in = wrepl_in;
update_state->wrepl_out = wrepl_out;
update_state->cycle_io.in.partner = wrepl_out->partner;

393
source4/wrepl_server/wrepl_in_connection.c
View File

@ -31,6 +31,8 @@
#include "smbd/process_model.h"
#include "system/network.h"
#include "lib/socket/netif.h"
#include "lib/tsocket/tsocket.h"
#include "libcli/util/tstream.h"
#include "param/param.h"
void wreplsrv_terminate_in_connection(struct wreplsrv_in_connection *wreplconn, const char *reason)
@ -38,35 +40,19 @@ void wreplsrv_terminate_in_connection(struct wreplsrv_in_connection *wreplconn,
stream_terminate_connection(wreplconn->conn, reason);
}
static int terminate_after_send_destructor(struct wreplsrv_in_connection **tas)
{
wreplsrv_terminate_in_connection(*tas, "wreplsrv_in_connection: terminate_after_send");
return 0;
}
/*
receive some data on a WREPL connection
*/
static NTSTATUS wreplsrv_recv_request(void *private_data, DATA_BLOB blob)
static NTSTATUS wreplsrv_process(struct wreplsrv_in_connection *wrepl_conn,
struct wreplsrv_in_call **_call)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(private_data, struct wreplsrv_in_connection);
struct wreplsrv_in_call *call;
DATA_BLOB packet_in_blob;
DATA_BLOB packet_out_blob;
struct wrepl_wrap packet_out_wrap;
NTSTATUS status;
enum ndr_err_code ndr_err;
struct wreplsrv_in_call *call = *_call;
call = talloc_zero(wreplconn, struct wreplsrv_in_call);
NT_STATUS_HAVE_NO_MEMORY(call);
call->wreplconn = wreplconn;
talloc_steal(call, blob.data);
packet_in_blob.data = blob.data + 4;
packet_in_blob.length = blob.length - 4;
ndr_err = ndr_pull_struct_blob(&packet_in_blob, call,
lp_iconv_convenience(wreplconn->service->task->lp_ctx),
ndr_err = ndr_pull_struct_blob(&call->in, call,
lp_iconv_convenience(wrepl_conn->service->task->lp_ctx),
&call->req_packet,
(ndr_pull_flags_fn_t)ndr_pull_wrepl_packet);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
@ -74,8 +60,8 @@ static NTSTATUS wreplsrv_recv_request(void *private_data, DATA_BLOB blob)
}
if (DEBUGLVL(10)) {
DEBUG(10,("Received WINS-Replication packet of length %u\n",
(unsigned)packet_in_blob.length + 4));
DEBUG(10,("Received WINS-Replication packet of length %u\n",
(unsigned int) call->in.length + 4));
NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet);
}
@ -84,70 +70,31 @@ static NTSTATUS wreplsrv_recv_request(void *private_data, DATA_BLOB blob)
if (!NT_STATUS_IS_OK(status)) {
/* w2k just ignores invalid packets, so we do */
DEBUG(10,("Received WINS-Replication packet was invalid, we just ignore it\n"));
talloc_free(call);
TALLOC_FREE(call);
*_call = NULL;
return NT_STATUS_OK;
}
/* and now encode the reply */
packet_out_wrap.packet = call->rep_packet;
ndr_err = ndr_push_struct_blob(&packet_out_blob, call,
lp_iconv_convenience(wreplconn->service->task->lp_ctx),
ndr_err = ndr_push_struct_blob(&call->out, call,
lp_iconv_convenience(wrepl_conn->service->task->lp_ctx),
&packet_out_wrap,
(ndr_push_flags_fn_t)ndr_push_wrepl_wrap);
(ndr_push_flags_fn_t) ndr_push_wrepl_wrap);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return ndr_map_error2ntstatus(ndr_err);
}
if (DEBUGLVL(10)) {
DEBUG(10,("Sending WINS-Replication packet of length %d\n", (int)packet_out_blob.length));
DEBUG(10,("Sending WINS-Replication packet of length %u\n",
(unsigned int) call->out.length));
NDR_PRINT_DEBUG(wrepl_packet, &call->rep_packet);
}
if (call->terminate_after_send) {
struct wreplsrv_in_connection **tas;
tas = talloc(packet_out_blob.data, struct wreplsrv_in_connection *);
NT_STATUS_HAVE_NO_MEMORY(tas);
*tas = wreplconn;
talloc_set_destructor(tas, terminate_after_send_destructor);
}
status = packet_send(wreplconn->packet, packet_out_blob);
NT_STATUS_NOT_OK_RETURN(status);
talloc_free(call);
return NT_STATUS_OK;
}
/*
called when the socket becomes readable
*/
static void wreplsrv_recv(struct stream_connection *conn, uint16_t flags)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private_data,
struct wreplsrv_in_connection);
packet_recv(wreplconn->packet);
}
/*
called when the socket becomes writable
*/
static void wreplsrv_send(struct stream_connection *conn, uint16_t flags)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private_data,
struct wreplsrv_in_connection);
packet_queue_run(wreplconn->packet);
}
/*
handle socket recv errors
*/
static void wreplsrv_recv_error(void *private_data, NTSTATUS status)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(private_data,
struct wreplsrv_in_connection);
wreplsrv_terminate_in_connection(wreplconn, nt_errstr(status));
}
static void wreplsrv_call_loop(struct tevent_req *subreq);
/*
called when we get a new connection
@ -155,43 +102,240 @@ static void wreplsrv_recv_error(void *private_data, NTSTATUS status)
static void wreplsrv_accept(struct stream_connection *conn)
{
struct wreplsrv_service *service = talloc_get_type(conn->private_data, struct wreplsrv_service);
struct wreplsrv_in_connection *wreplconn;
struct wreplsrv_in_connection *wrepl_conn;
struct socket_address *peer_ip;
struct tevent_req *subreq;
int rc, fd;
wreplconn = talloc_zero(conn, struct wreplsrv_in_connection);
if (!wreplconn) {
stream_terminate_connection(conn, "wreplsrv_accept: out of memory");
wrepl_conn = talloc_zero(conn, struct wreplsrv_in_connection);
if (wrepl_conn == NULL) {
stream_terminate_connection(conn,
"wreplsrv_accept: out of memory");
return;
}
wreplconn->packet = packet_init(wreplconn);
if (!wreplconn->packet) {
wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory");
return;
}
packet_set_private(wreplconn->packet, wreplconn);
packet_set_socket(wreplconn->packet, conn->socket);
packet_set_callback(wreplconn->packet, wreplsrv_recv_request);
packet_set_full_request(wreplconn->packet, packet_full_request_u32);
packet_set_error_handler(wreplconn->packet, wreplsrv_recv_error);
packet_set_event_context(wreplconn->packet, conn->event.ctx);
packet_set_fde(wreplconn->packet, conn->event.fde);
packet_set_serialise(wreplconn->packet);
wreplconn->conn = conn;
wreplconn->service = service;
peer_ip = socket_get_peer_addr(conn->socket, wreplconn);
if (!peer_ip) {
wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: could not obtain peer IP from kernel");
wrepl_conn->send_queue = tevent_queue_create(conn, "wrepl_accept");
if (wrepl_conn->send_queue == NULL) {
stream_terminate_connection(conn,
"wrepl_accept: out of memory");
return;
}
wreplconn->partner = wreplsrv_find_partner(service, peer_ip->addr);
TALLOC_FREE(conn->event.fde);
conn->private_data = wreplconn;
/*
* Clone the fd that the connection isn't closed if we create a client
* connection.
*/
fd = dup(socket_get_fd(conn->socket));
if (fd == -1) {
char *reason;
reason = talloc_asprintf(conn,
"wrepl_accept: failed to duplicate the file descriptor - %s",
strerror(errno));
if (reason == NULL) {
reason = strerror(errno);
}
stream_terminate_connection(conn, reason);
}
rc = tstream_bsd_existing_socket(wrepl_conn,
fd,
&wrepl_conn->tstream);
if (rc < 0) {
stream_terminate_connection(conn,
"wrepl_accept: out of memory");
return;
}
wrepl_conn->conn = conn;
wrepl_conn->service = service;
peer_ip = socket_get_peer_addr(conn->socket, wrepl_conn);
if (peer_ip == NULL) {
wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_accept: "
"could not obtain peer IP from kernel");
return;
}
wrepl_conn->partner = wreplsrv_find_partner(service, peer_ip->addr);
irpc_add_name(conn->msg_ctx, "wreplsrv_connection");
/*
* The wrepl pdu's has the length as 4 byte (initial_read_size),
* packet_full_request_u32 provides the pdu length then.
*/
subreq = tstream_read_pdu_blob_send(wrepl_conn,
wrepl_conn->conn->event.ctx,
wrepl_conn->tstream,
4, /* initial_read_size */
packet_full_request_u32,
wrepl_conn);
if (subreq == NULL) {
wreplsrv_terminate_in_connection(wrepl_conn, "wrepl_accept: "
"no memory for tstream_read_pdu_blob_send");
return;
}
tevent_req_set_callback(subreq, wreplsrv_call_loop, wrepl_conn);
}
static void wreplsrv_call_writev_done(struct tevent_req *subreq);
static void wreplsrv_call_loop(struct tevent_req *subreq)
{
struct wreplsrv_in_connection *wrepl_conn = tevent_req_callback_data(subreq,
struct wreplsrv_in_connection);
struct wreplsrv_in_call *call;
NTSTATUS status;
call = talloc_zero(wrepl_conn, struct wreplsrv_in_call);
if (call == NULL) {
wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_call_loop: "
"no memory for wrepl_samba3_call");
return;
}
call->wreplconn = wrepl_conn;
status = tstream_read_pdu_blob_recv(subreq,
call,
&call->in);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
const char *reason;
reason = talloc_asprintf(call, "wreplsrv_call_loop: "
"tstream_read_pdu_blob_recv() - %s",
nt_errstr(status));
if (!reason) {
reason = nt_errstr(status);
}
wreplsrv_terminate_in_connection(wrepl_conn, reason);
return;
}
DEBUG(10,("Received wrepl packet of length %lu from %s\n",
(long) call->in.length,
tsocket_address_string(wrepl_conn->conn->remote_address, call)));
/* skip length header */
call->in.data += 4;
call->in.length -= 4;
status = wreplsrv_process(wrepl_conn, &call);
if (!NT_STATUS_IS_OK(status)) {
const char *reason;
reason = talloc_asprintf(call, "wreplsrv_call_loop: "
"tstream_read_pdu_blob_recv() - %s",
nt_errstr(status));
if (reason == NULL) {
reason = nt_errstr(status);
}
wreplsrv_terminate_in_connection(wrepl_conn, reason);
return;
}
/* We handed over the connection so we're done here */
if (wrepl_conn->tstream == NULL) {
return;
}
/* Invalid WINS-Replication packet, we just ignore it */
if (call == NULL) {
goto noreply;
}
call->out_iov[0].iov_base = call->out.data;
call->out_iov[0].iov_len = call->out.length;
subreq = tstream_writev_queue_send(call,
wrepl_conn->conn->event.ctx,
wrepl_conn->tstream,
wrepl_conn->send_queue,
call->out_iov, 1);
if (subreq == NULL) {
wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_call_loop: "
"no memory for tstream_writev_queue_send");
return;
}
tevent_req_set_callback(subreq, wreplsrv_call_writev_done, call);
noreply:
/*
* The wrepl pdu's has the length as 4 byte (initial_read_size),
* provides the pdu length then.
*/
subreq = tstream_read_pdu_blob_send(wrepl_conn,
wrepl_conn->conn->event.ctx,
wrepl_conn->tstream,
4, /* initial_read_size */
packet_full_request_u32,
wrepl_conn);
if (subreq == NULL) {
wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_call_loop: "
"no memory for tstream_read_pdu_blob_send");
return;
}
tevent_req_set_callback(subreq, wreplsrv_call_loop, wrepl_conn);
}
static void wreplsrv_call_writev_done(struct tevent_req *subreq)
{
struct wreplsrv_in_call *call = tevent_req_callback_data(subreq,
struct wreplsrv_in_call);
int sys_errno;
int rc;
rc = tstream_writev_queue_recv(subreq, &sys_errno);
TALLOC_FREE(subreq);
if (rc == -1) {
const char *reason;
reason = talloc_asprintf(call, "wreplsrv_call_writev_done: "
"tstream_writev_queue_recv() - %d:%s",
sys_errno, strerror(sys_errno));
if (reason == NULL) {
reason = "wreplsrv_call_writev_done: "
"tstream_writev_queue_recv() failed";
}
wreplsrv_terminate_in_connection(call->wreplconn, reason);
return;
}
if (call->terminate_after_send) {
wreplsrv_terminate_in_connection(call->wreplconn,
"wreplsrv_in_connection: terminate_after_send");
return;
}
talloc_free(call);
}
/*
called on a tcp recv
*/
static void wreplsrv_recv(struct stream_connection *conn, uint16_t flags)
{
struct wreplsrv_in_connection *wrepl_conn = talloc_get_type(conn->private_data,
struct wreplsrv_in_connection);
/* this should never be triggered! */
DEBUG(0,("Terminating connection - '%s'\n", "wrepl_recv: called"));
wreplsrv_terminate_in_connection(wrepl_conn, "wrepl_recv: called");
}
/*
called when we can write to a connection
*/
static void wreplsrv_send(struct stream_connection *conn, uint16_t flags)
{
struct wreplsrv_in_connection *wrepl_conn = talloc_get_type(conn->private_data,
struct wreplsrv_in_connection);
/* this should never be triggered! */
DEBUG(0,("Terminating connection - '%s'\n", "wrepl_send: called"));
wreplsrv_terminate_in_connection(wrepl_conn, "wrepl_send: called");
}
static const struct stream_server_ops wreplsrv_stream_ops = {
@ -206,14 +350,15 @@ static const struct stream_server_ops wreplsrv_stream_ops = {
*/
NTSTATUS wreplsrv_in_connection_merge(struct wreplsrv_partner *partner,
struct socket_context *sock,
struct packet_context *packet,
struct wreplsrv_in_connection **_wrepl_in)
{
struct wreplsrv_service *service = partner->service;
struct wreplsrv_in_connection *wrepl_in;
const struct model_ops *model_ops;
struct stream_connection *conn;
struct tevent_req *subreq;
NTSTATUS status;
int rc;
/* within the wrepl task we want to be a single process, so
ask for the single process model ops and pass these to the
@ -230,9 +375,14 @@ NTSTATUS wreplsrv_in_connection_merge(struct wreplsrv_partner *partner,
wrepl_in->service = service;
wrepl_in->partner = partner;
status = stream_new_connection_merge(service->task->event_ctx, service->task->lp_ctx, model_ops,
sock, &wreplsrv_stream_ops, service->task->msg_ctx,
wrepl_in, &conn);
status = stream_new_connection_merge(service->task->event_ctx,
service->task->lp_ctx,
model_ops,
sock,
&wreplsrv_stream_ops,
service->task->msg_ctx,
wrepl_in,
&conn);
NT_STATUS_NOT_OK_RETURN(status);
/*
@ -242,20 +392,43 @@ NTSTATUS wreplsrv_in_connection_merge(struct wreplsrv_partner *partner,
wrepl_in->conn = conn;
talloc_steal(conn, wrepl_in);
wrepl_in->send_queue = tevent_queue_create(wrepl_in, "wreplsrv_in_connection_merge");
if (wrepl_in->send_queue == NULL) {
stream_terminate_connection(conn,
"wreplsrv_in_connection_merge: out of memory");
return NT_STATUS_NO_MEMORY;
}
TALLOC_FREE(conn->event.fde);
rc = tstream_bsd_existing_socket(wrepl_in,
socket_get_fd(sock),
&wrepl_in->tstream);
if (rc < 0) {
stream_terminate_connection(conn,
"wreplsrv_in_connection_merge: out of memory");
return NT_STATUS_NO_MEMORY;
}
/*
* now update the packet handling callback,...
* The wrepl pdu's has the length as 4 byte (initial_read_size),
* packet_full_request_u32 provides the pdu length then.
*/
wrepl_in->packet = talloc_steal(wrepl_in, packet);
packet_set_private(wrepl_in->packet, wrepl_in);
packet_set_socket(wrepl_in->packet, conn->socket);
packet_set_callback(wrepl_in->packet, wreplsrv_recv_request);
packet_set_full_request(wrepl_in->packet, packet_full_request_u32);
packet_set_error_handler(wrepl_in->packet, wreplsrv_recv_error);
packet_set_event_context(wrepl_in->packet, conn->event.ctx);
packet_set_fde(wrepl_in->packet, conn->event.fde);
packet_set_serialise(wrepl_in->packet);
subreq = tstream_read_pdu_blob_send(wrepl_in,
wrepl_in->conn->event.ctx,
wrepl_in->tstream,
4, /* initial_read_size */
packet_full_request_u32,
wrepl_in);
if (subreq == NULL) {
wreplsrv_terminate_in_connection(wrepl_in, "wreplsrv_in_connection_merge: "
"no memory for tstream_read_pdu_blob_send");
return NT_STATUS_NO_MEMORY;
}
tevent_req_set_callback(subreq, wreplsrv_call_loop, wrepl_in);
*_wrepl_in = wrepl_in;
return NT_STATUS_OK;
}

26
source4/wrepl_server/wrepl_out_helpers.c
View File

@ -855,8 +855,6 @@ static NTSTATUS wreplsrv_push_notify_update(struct wreplsrv_push_notify_state *s
struct wreplsrv_in_connection *wrepl_in;
NTSTATUS status;
struct socket_context *sock;
struct packet_context *packet;
uint16_t fde_flags;
/* prepare the outgoing request */
req->opcode = WREPL_OPCODE_BITS;
@ -885,21 +883,12 @@ static NTSTATUS wreplsrv_push_notify_update(struct wreplsrv_push_notify_state *s
state->wreplconn->sock->sock = NULL;
talloc_steal(state, sock);
/*
* steal the packet_context
* note the request DATA_BLOB we just send on the
* wrepl_socket (client connection) is still unter the
* packet context and will be send to the wire
*/
packet = state->wreplconn->sock->packet;
state->wreplconn->sock->packet = NULL;
talloc_steal(state, packet);
/*
* get the fde_flags of the old fde event,
* so that we can later set the same flags to the new one
* TODO: steal the tstream if we switch the client to tsocket.
* This is just to get a compiler error as soon as we remove
* packet_context.
*/
fde_flags = event_get_fd_flags(state->wreplconn->sock->event.fde);
state->wreplconn->sock->packet = NULL;
/*
* free the wrepl_socket (client connection)
@ -915,17 +904,14 @@ static NTSTATUS wreplsrv_push_notify_update(struct wreplsrv_push_notify_state *s
* wreplsrv_in_connection_merge()
*/
status = wreplsrv_in_connection_merge(state->io->in.partner,
sock, packet, &wrepl_in);
sock, &wrepl_in);
NT_STATUS_NOT_OK_RETURN(status);
event_set_fd_flags(wrepl_in->conn->event.fde, fde_flags);
wrepl_in->assoc_ctx.peer_ctx = state->wreplconn->assoc_ctx.peer_ctx;
wrepl_in->assoc_ctx.our_ctx = 0;
/* now we can free the wreplsrv_out_connection */
talloc_free(state->wreplconn);
state->wreplconn = NULL;
TALLOC_FREE(state->wreplconn);
state->stage = WREPLSRV_PUSH_NOTIFY_STAGE_DONE;

9
source4/wrepl_server/wrepl_server.h
View File

@ -19,6 +19,8 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "system/network.h"
struct wreplsrv_service;
struct wreplsrv_in_connection;
struct wreplsrv_out_connection;
@ -35,6 +37,10 @@ struct wreplsrv_in_call {
struct wrepl_packet req_packet;
struct wrepl_packet rep_packet;
bool terminate_after_send;
DATA_BLOB in;
DATA_BLOB out;
struct iovec out_iov[1];
};
/*
@ -43,7 +49,8 @@ struct wreplsrv_in_call {
struct wreplsrv_in_connection {
struct wreplsrv_in_connection *prev,*next;
struct stream_connection *conn;
struct packet_context *packet;
struct tstream_context *tstream;
struct tevent_queue *send_queue;
/* our global service context */
struct wreplsrv_service *service;