// Looked up the message in the store. Time to send the response value back to
// the requester. The CF_BYTEARRAY is handed off in this case. If you want to
// keep a reference, then keep the reference yourself.
int
as_proxy_send_response(cf_node dst, msg *m, uint32_t result_code, uint32_t generation,
uint32_t void_time, as_msg_op **ops, as_bin **bins, uint16_t bin_count,
as_namespace *ns, uint64_t trid, const char *setname)
{
uint32_t tid;
msg_get_uint32(m, PROXY_FIELD_TID, &tid);
#ifdef DEBUG
cf_debug(AS_PROXY, "proxy send response: message %p bytearray %p tid %d", m, result_code, tid);
#endif
msg_reset(m);
msg_set_uint32(m, PROXY_FIELD_OP, PROXY_OP_RESPONSE);
msg_set_uint32(m, PROXY_FIELD_TID, tid);
size_t msg_sz = 0;
cl_msg * msgp = as_msg_make_response_msg(result_code, generation, void_time, ops,
bins, bin_count, ns, 0, &msg_sz, trid, setname);
msg_set_buf(m, PROXY_FIELD_AS_PROTO, (byte *) msgp, msg_sz, MSG_SET_HANDOFF_MALLOC);
int rv = as_fabric_send(dst, m, AS_FABRIC_PRIORITY_MEDIUM);
if (rv != 0) {
cf_debug(AS_PROXY, "sending proxy response: fabric send err %d, catch you on the retry", rv);
as_fabric_msg_put(m);
}
return 0;
} // end as_proxy_send_response()
int
as_proxy_send_ops_response(cf_node dst, msg *m, cf_dyn_buf *db)
{
uint32_t tid;
msg_get_uint32(m, PROXY_FIELD_TID, &tid);
#ifdef DEBUG
cf_debug(AS_PROXY, "proxy send response: message %p bytearray %p tid %d", m, result_code, tid);
#endif
msg_reset(m);
msg_set_uint32(m, PROXY_FIELD_OP, PROXY_OP_RESPONSE);
msg_set_uint32(m, PROXY_FIELD_TID, tid);
uint8_t *msgp = db->buf;
size_t msg_sz = db->used_sz;
if (db->is_stack) {
msg_set_buf(m, PROXY_FIELD_AS_PROTO, msgp, msg_sz, MSG_SET_COPY);
}
else {
msg_set_buf(m, PROXY_FIELD_AS_PROTO, msgp, msg_sz, MSG_SET_HANDOFF_MALLOC);
db->buf = NULL; // the fabric owns the buffer now
}
int rv = as_fabric_send(dst, m, AS_FABRIC_PRIORITY_MEDIUM);
if (rv != 0) {
cf_debug(AS_PROXY, "sending proxy response: fabric send err %d, catch you on the retry", rv);
as_fabric_msg_put(m);
}
return 0;
} // end as_proxy_send_ops_response()
// For LDTs only:
void
repl_write_ldt_make_message(msg* m, as_transaction* tr, uint8_t** p_pickled_buf,
size_t pickled_sz, as_rec_props* p_pickled_rec_props, bool is_subrec)
{
as_namespace* ns = tr->rsv.ns;
msg_set_uint32(m, RW_FIELD_OP, RW_OP_WRITE);
msg_set_buf(m, RW_FIELD_NAMESPACE, (uint8_t*)ns->name, strlen(ns->name),
MSG_SET_COPY);
msg_set_uint32(m, RW_FIELD_NS_ID, ns->id);
msg_set_buf(m, RW_FIELD_DIGEST, (void*)&tr->keyd, sizeof(cf_digest),
MSG_SET_COPY);
msg_set_uint64(m, RW_FIELD_CLUSTER_KEY, tr->rsv.cluster_key);
msg_set_uint32(m, RW_FIELD_GENERATION, tr->generation);
msg_set_uint32(m, RW_FIELD_VOID_TIME, tr->void_time);
msg_set_uint64(m, RW_FIELD_LAST_UPDATE_TIME, tr->last_update_time);
// TODO - do we really get here if ldt_enabled is false?
if (ns->ldt_enabled && ! is_subrec) {
msg_set_buf(m, RW_FIELD_VINFOSET, (uint8_t*)&tr->rsv.p->version_info,
sizeof(as_partition_vinfo), MSG_SET_COPY);
if (tr->rsv.p->current_outgoing_ldt_version != 0) {
msg_set_uint64(m, RW_FIELD_LDT_VERSION,
tr->rsv.p->current_outgoing_ldt_version);
}
}
uint32_t info = pack_info_bits(tr, true);
if (*p_pickled_buf) {
bool is_sub;
bool is_parent;
as_ldt_get_property(p_pickled_rec_props, &is_parent, &is_sub);
info |= pack_ldt_info_bits(tr, is_parent, is_sub);
msg_set_buf(m, RW_FIELD_RECORD, (void*)*p_pickled_buf, pickled_sz,
MSG_SET_HANDOFF_MALLOC);
*p_pickled_buf = NULL;
if (p_pickled_rec_props && p_pickled_rec_props->p_data) {
msg_set_buf(m, RW_FIELD_REC_PROPS, p_pickled_rec_props->p_data,
p_pickled_rec_props->size, MSG_SET_HANDOFF_MALLOC);
as_rec_props_clear(p_pickled_rec_props);
}
}
else {
msg_set_buf(m, RW_FIELD_AS_MSG, (void*)tr->msgp,
as_proto_size_get(&tr->msgp->proto), MSG_SET_COPY);
info |= pack_ldt_info_bits(tr, false, is_subrec);
}
msg_set_uint32(m, RW_FIELD_INFO, info);
}
// For LDTs only:
void
send_multiop_ack(cf_node node, msg* m, uint32_t result)
{
msg_preserve_fields(m, 3, RW_FIELD_NS_ID, RW_FIELD_DIGEST, RW_FIELD_TID);
msg_set_uint32(m, RW_FIELD_OP, RW_OP_MULTI_ACK);
msg_set_uint32(m, RW_FIELD_RESULT, result);
if (as_fabric_send(node, m, AS_FABRIC_PRIORITY_MEDIUM) !=
AS_FABRIC_SUCCESS) {
as_fabric_msg_put(m);
}
}
// Send a redirection message - consumes the message.
int
as_proxy_send_redirect(cf_node dst, msg *m, cf_node rdst)
{
int rv;
uint32_t tid;
msg_get_uint32(m, PROXY_FIELD_TID, &tid);
msg_reset(m);
msg_set_uint32(m, PROXY_FIELD_OP, PROXY_OP_REDIRECT);
msg_set_uint32(m, PROXY_FIELD_TID, tid);
msg_set_uint64(m, PROXY_FIELD_REDIRECT, rdst);
if (0 != (rv = as_fabric_send(dst, m, AS_FABRIC_PRIORITY_MEDIUM))) {
cf_debug(AS_PROXY, "sending redirection failed: fabric send error %d", rv);
as_fabric_msg_put(m);
}
return 0;
} // end as_proxy_send_redirect()
/*
* The work horse function to process the acknowledgment for the duplicate op.
* It is received after the intended node has finished performing the op. In
* case of success the op would have been successfully performed and replicated.
* In case of failure the op would not have been performed anywhere.
*
* The retransmit is handled by making sure op hangs from the write hash as long
* as it is not applied or failed. Any attempt to perform next operation has to
* hang behind it unless it is finished. Also operation is assigned a timestamp
* so that there is some protection in case the op arrives out of order, or the
* same op comes back again. That would be a duplicate op ...
*
* Received a op message - I'm a winner duplicate on this partition. Perform the
* UDF op and replicate to all the nodes in the replica list. We only replicate
* the subrecord if the partition is in subrecord migration phase. If not, ship
* both subrecord and record. In case partition is read replica on this node, do
* the write and signal back that I'm done.
*
* THUS - PROLE SIDE
*
* is_write is misnamed. Differentiates between the 'duplicate' phase and the
* 'operation' phase. If is_write == false, we're in the 'duplicate' phase.
*
* Algorithm
*
* This code is called when op is shipped to the winner node.
*
* 1. Assert that current node is indeed the winner node.
* 2. Assert the cluster key matches.
* 3. Create a transaction and apply the UDF. Create an internal transaction and
* make sure it does some sort of reservation and applies the write and
* replicates to replica set. Once the write is done it sends the op ack.
*
* TODO: How do you handle retransmits?
* TODO: How do you handle partition reservation? Is it something special.
* TODO: How to send along with replication request? Same infra should be
* used by normal replication as well.
*
* There won't be any deadlock because the requests are triggered from the
* write. Get down to the udf apply code. Replicate to replica set and then
* make sure the response is sent back to the originating node. This node has
* to make sure the replication actually did succeed.
*
* In the response code you need to add the callback function.
*/
int
as_proxy_shipop_response_hdlr(msg *m, proxy_request *pr, bool *free_msg)
{
int rv = -1;
write_request *wr = pr->wr;
if (!wr) {
return -1;
}
cf_assert((pr->fd_h == NULL), AS_PROXY, CF_WARNING, "fd_h set for shipop proxy response");
// If there is a write request hanging from pr then this is a response to
// the proxy ship op request. This node is the resolving node (node @ which
// duplicate resolution was triggered). It could be:
// 1. Originating node [where the request was sent from the client] - in
// that case send response back to the client directly.
// 2. Non-originating node [where the request arrived as a regular proxy] -
// in that case send response back to the proxy originating node.
// Case 1: Non-originating node.
if (wr->proxy_msg) {
// Remember that "digest" gets printed at the end of cf_detail_digest().
// Fake the ORIGINATING Proxy tid
uint32_t transaction_id = 0;
msg_get_uint32(wr->proxy_msg, PROXY_FIELD_TID, &transaction_id);
msg_set_uint32(m, PROXY_FIELD_TID, transaction_id);
cf_detail_digest(AS_PROXY, &(wr->keyd), "SHIPPED_OP NON-ORIG :: Got Op Response(%p) :", wr);
cf_detail_digest(AS_PROXY, &(wr->keyd), "SHIPPED_OP NON-ORIG :: Back Forwarding Response for tid (%d). : ", transaction_id);
if (0 != (rv = as_fabric_send(wr->proxy_node, m, AS_FABRIC_PRIORITY_MEDIUM))) {
cf_detail_digest(AS_PROXY, &wr->keyd, "SHIPPED_OP NONORIG Failed Forwarding Response");
as_fabric_msg_put(m);
}
*free_msg = false;
}
// Case 2: Originating node.
else {
cf_detail_digest(AS_PROXY, &wr->keyd, "SHIPPED_OP ORIG Got Op Response");
pthread_mutex_lock(&wr->lock);
if (wr->proto_fd_h) {
if (!wr->proto_fd_h->fd) {
cf_warning_digest(AS_PROXY, &wr->keyd, "SHIPPED_OP ORIG Missing fd in proto_fd ");
}
else {
as_proto *proto;
size_t proto_sz;
if (0 != msg_get_buf(m, PROXY_FIELD_AS_PROTO, (byte **) &proto, &proto_sz, MSG_GET_DIRECT)) {
cf_info(AS_PROXY, "msg get buf failed!");
}
size_t pos = 0;
while (pos < proto_sz) {
rv = send(wr->proto_fd_h->fd, (((uint8_t *)proto) + pos), proto_sz - pos, MSG_NOSIGNAL);
if (rv > 0) {
pos += rv;
}
else if (rv < 0) {
if (errno != EWOULDBLOCK) {
// Common message when a client aborts.
cf_debug(AS_PROTO, "protocol proxy write fail: fd %d "
"sz %d pos %d rv %d errno %d",
wr->proto_fd_h->fd, proto_sz, pos, rv, errno);
shutdown(wr->proto_fd_h->fd, SHUT_RDWR);
break;
}
usleep(1); // yield
}
else {
cf_info(AS_PROTO, "protocol write fail zero return: fd %d sz %d pos %d ",
wr->proto_fd_h->fd, proto_sz, pos);
shutdown(wr->proto_fd_h->fd, SHUT_RDWR);
break;
}
}
cf_detail_digest(AS_PROXY, &wr->keyd, "SHIPPED_OP ORIG Response Sent to Client");
}
wr->proto_fd_h->t_inprogress = false;
AS_RELEASE_FILE_HANDLE(wr->proto_fd_h);
wr->proto_fd_h = 0;
} else {
// this may be NULL if the request has already timedout and the wr proto_fd_h
// will be cleaned up by then
cf_detail_digest(AS_PROXY, &wr->keyd, "SHIPPED_OP ORIG Missing proto_fd ");
// Note: This may be needed if this is node where internal scan or query
// UDF is initiated where it happens so that there is migration is going
// on and the request get routed to the remote node which is winning node
// This request may need the req_cb to be called.
if (udf_rw_needcomplete_wr(wr)) {
as_transaction tr;
write_request_init_tr(&tr, wr);
udf_rw_complete(&tr, 0, __FILE__, __LINE__);
if (tr.proto_fd_h) {
tr.proto_fd_h->t_inprogress = false;
AS_RELEASE_FILE_HANDLE(tr.proto_fd_h);
tr.proto_fd_h = 0;
}
}
}
pthread_mutex_unlock(&wr->lock);
}
// This node is shipOp initiator. Remove it from the Global
// hash
global_keyd gk;
gk.ns_id = wr->rsv.ns->id;
gk.keyd = wr->keyd;
g_write_hash_delete(&gk);
WR_RELEASE(pr->wr);
pr->wr = NULL;
return 0;
}
int
as_proxy_shipop(cf_node dst, write_request *wr)
{
as_partition_id pid = as_partition_getid(wr->keyd);
if (dst == 0) {
cf_crash(AS_PROXY, "the destination should never be zero");
}
// Create a fabric message, fill it out.
msg *m = as_fabric_msg_get(M_TYPE_PROXY);
if (!m) {
return -1;
}
uint32_t tid = cf_atomic32_incr(&g_proxy_tid);
msg_set_uint32(m, PROXY_FIELD_OP, PROXY_OP_REQUEST);
msg_set_uint32(m, PROXY_FIELD_TID, tid);
msg_set_buf(m, PROXY_FIELD_DIGEST, (void *) &wr->keyd, sizeof(cf_digest), MSG_SET_COPY);
msg_set_buf(m, PROXY_FIELD_AS_PROTO, (void *) wr->msgp, as_proto_size_get(&wr->msgp->proto), MSG_SET_HANDOFF_MALLOC);
msg_set_uint64(m, PROXY_FIELD_CLUSTER_KEY, as_paxos_get_cluster_key());
msg_set_uint32(m, PROXY_FIELD_TIMEOUT_MS, wr->msgp->msg.transaction_ttl);
wr->msgp = 0;
// If it is shipped op.
uint32_t info = 0;
info |= PROXY_INFO_SHIPPED_OP;
msg_set_uint32(m, PROXY_FIELD_INFO, info);
cf_detail_digest(AS_PROXY, &wr->keyd, "SHIPPED_OP %s->WINNER msg %p Proxy Sent to %"PRIx64" %p tid(%d)",
wr->proxy_msg ? "NONORIG" : "ORIG", m, dst, wr, tid);
// Fill out a retransmit structure, insert into the retransmit hash.
msg_incr_ref(m);
proxy_request pr;
pr.start_time = wr->start_time;
pr.end_time = (wr->end_time != 0) ? wr->end_time : pr.start_time + g_config.transaction_max_ns;
cf_rc_reserve(wr);
pr.wr = wr;
pr.fab_msg = m;
pr.xmit_ms = cf_getms() + g_config.transaction_retry_ms;
pr.retry_interval_ms = g_config.transaction_retry_ms;
pr.dest = dst;
pr.pid = pid;
pr.fd_h = NULL;
pr.batch_shared = NULL;
pr.batch_index = 0;
if (0 != shash_put(g_proxy_hash, &tid, &pr)) {
cf_info(AS_PROXY, " shash_put failed, need cleanup code");
return -1;
}
// Send to the remote node.
int rv = as_fabric_send(dst, m, AS_FABRIC_PRIORITY_MEDIUM);
if (rv != 0) {
cf_detail(AS_PROXY, "SHIPPED_OP ORIG [Digest %"PRIx64"] Failed with %d", *(uint64_t *)&wr->keyd, rv);
as_fabric_msg_put(m);
}
wr->shipped_op_initiator = true;
cf_atomic_int_incr(&g_config.ldt_proxy_initiate);
return 0;
}
// Make a request to another node.
//
// Note: there's a cheat here. 'as_msg' is used in a raw form, and includes
// structured data (version - type - nfields - sz ...) which should be made more
// wire-protocol-friendly.
int
as_proxy_divert(cf_node dst, as_transaction *tr, as_namespace *ns, uint64_t cluster_key)
{
cf_detail(AS_PROXY, "proxy divert");
cf_atomic_int_incr(&g_config.stat_proxy_reqs);
if (tr->msgp && (tr->msgp->msg.info1 & AS_MSG_INFO1_XDR)) {
cf_atomic_int_incr(&g_config.stat_proxy_reqs_xdr);
}
as_partition_id pid = as_partition_getid(tr->keyd);
if (dst == 0) {
// Get the list of replicas.
dst = as_partition_getreplica_read(ns, pid);
}
// Create a fabric message, fill it out.
msg *m = as_fabric_msg_get(M_TYPE_PROXY);
if (!m) {
return -1;
}
uint32_t tid = cf_atomic32_incr(&g_proxy_tid);
msg_set_uint32(m, PROXY_FIELD_OP, PROXY_OP_REQUEST);
msg_set_uint32(m, PROXY_FIELD_TID, tid);
msg_set_buf(m, PROXY_FIELD_DIGEST, (void *) &tr->keyd, sizeof(cf_digest), MSG_SET_COPY);
msg_set_type msettype = tr->batch_shared ? MSG_SET_COPY : MSG_SET_HANDOFF_MALLOC;
msg_set_buf(m, PROXY_FIELD_AS_PROTO, (void *) tr->msgp, as_proto_size_get(&tr->msgp->proto), msettype);
msg_set_uint64(m, PROXY_FIELD_CLUSTER_KEY, cluster_key);
msg_set_uint32(m, PROXY_FIELD_TIMEOUT_MS, tr->msgp->msg.transaction_ttl);
tr->msgp = 0;
cf_debug_digest(AS_PROXY, &tr->keyd, "proxy_divert: fab_msg %p dst %"PRIx64, m, dst);
// Fill out a retransmit structure, insert into the retransmit hash.
msg_incr_ref(m);
proxy_request pr;
pr.start_time = tr->start_time;
pr.end_time = (tr->end_time != 0) ? tr->end_time : pr.start_time + g_config.transaction_max_ns;
pr.fd_h = tr->proto_fd_h;
tr->proto_fd_h = 0;
pr.fab_msg = m;
pr.xmit_ms = cf_getms() + g_config.transaction_retry_ms;
pr.retry_interval_ms = g_config.transaction_retry_ms;
pr.dest = dst;
pr.pid = pid;
pr.ns = ns;
pr.wr = NULL;
pr.batch_shared = tr->batch_shared;
pr.batch_index = tr->batch_index;
if (0 != shash_put(g_proxy_hash, &tid, &pr)) {
cf_debug(AS_PROXY, " shash_put failed, need cleanup code");
return -1;
}
// Send to the remote node.
int rv = as_fabric_send(dst, m, AS_FABRIC_PRIORITY_MEDIUM);
if (rv != 0) {
cf_debug(AS_PROXY, "as_proxy_divert: returned error %d", rv);
as_fabric_msg_put(m);
}
cf_atomic_int_incr(&g_config.proxy_initiate);
return 0;
}
bool
repl_write_make_message(rw_request* rw, as_transaction* tr)
{
if (rw->dest_msg) {
msg_reset(rw->dest_msg);
}
else if (! (rw->dest_msg = as_fabric_msg_get(M_TYPE_RW))) {
return false;
}
as_namespace* ns = tr->rsv.ns;
msg* m = rw->dest_msg;
msg_set_uint32(m, RW_FIELD_OP, rw->is_multiop ? RW_OP_MULTI : RW_OP_WRITE);
msg_set_buf(m, RW_FIELD_NAMESPACE, (uint8_t*)ns->name, strlen(ns->name),
MSG_SET_COPY);
msg_set_uint32(m, RW_FIELD_NS_ID, ns->id);
msg_set_buf(m, RW_FIELD_DIGEST, (void*)&tr->keyd, sizeof(cf_digest),
MSG_SET_COPY);
msg_set_uint64(m, RW_FIELD_CLUSTER_KEY, tr->rsv.cluster_key);
msg_set_uint32(m, RW_FIELD_TID, rw->tid);
msg_set_uint32(m, RW_FIELD_GENERATION, tr->generation);
msg_set_uint32(m, RW_FIELD_VOID_TIME, tr->void_time);
msg_set_uint64(m, RW_FIELD_LAST_UPDATE_TIME, tr->last_update_time);
// TODO - do we really intend to send this if the record is non-LDT?
if (ns->ldt_enabled) {
msg_set_buf(m, RW_FIELD_VINFOSET, (uint8_t*)&tr->rsv.p->version_info,
sizeof(as_partition_vinfo), MSG_SET_COPY);
if (tr->rsv.p->current_outgoing_ldt_version != 0) {
msg_set_uint64(m, RW_FIELD_LDT_VERSION,
tr->rsv.p->current_outgoing_ldt_version);
}
}
if (rw->is_multiop) {
msg_set_uint32(m, RW_FIELD_INFO, RW_INFO_LDT);
msg_set_buf(m, RW_FIELD_MULTIOP, (void*)rw->pickled_buf, rw->pickled_sz,
MSG_SET_HANDOFF_MALLOC);
// Make sure destructor doesn't free this.
rw->pickled_buf = NULL;
return true;
}
uint32_t info = pack_info_bits(tr, rw->has_udf);
if (rw->pickled_buf) {
// Replica writes.
bool is_sub;
bool is_parent;
as_ldt_get_property(&rw->pickled_rec_props, &is_parent, &is_sub);
info |= pack_ldt_info_bits(tr, is_parent, is_sub);
msg_set_buf(m, RW_FIELD_RECORD, (void*)rw->pickled_buf, rw->pickled_sz,
MSG_SET_HANDOFF_MALLOC);
// Make sure destructor doesn't free this.
rw->pickled_buf = NULL;
if (rw->pickled_rec_props.p_data) {
msg_set_buf(m, RW_FIELD_REC_PROPS, rw->pickled_rec_props.p_data,
rw->pickled_rec_props.size, MSG_SET_HANDOFF_MALLOC);
// Make sure destructor doesn't free the data.
as_rec_props_clear(&rw->pickled_rec_props);
}
}
else {
// Replica deletes.
msg_set_buf(m, RW_FIELD_AS_MSG, (void*)tr->msgp,
as_proto_size_get(&tr->msgp->proto), MSG_SET_COPY);
info |= pack_ldt_info_bits(tr, false, false);
}
msg_set_uint32(m, RW_FIELD_INFO, info);
return true;
}
