protocol design and packet details
*/
#include "includes.h"
-#include "lib/events/events.h"
+#include "lib/tevent/tevent.h"
#include "lib/tdb/include/tdb.h"
#include "lib/util/dlinklist.h"
#include "system/network.h"
char *msg;
int msglen, len;
+ if (ctdb->methods == NULL) {
+ DEBUG(DEBUG_INFO,(__location__ " Failed to send error. Transport is DOWN\n"));
+ return;
+ }
+
va_start(ap, fmt);
msg = talloc_vasprintf(ctdb, fmt, ap);
if (msg == NULL) {
header->dmaster = new_dmaster;
ret = ctdb_ltdb_store(ctdb_db, key, header, data);
if (ret != 0) {
- ctdb_fatal(ctdb, "ctdb_req_dmaster unable to update dmaster");
+ ctdb_fatal(ctdb, "ctdb_send_dmaster_reply unable to update dmaster");
+ return;
+ }
+
+ if (ctdb->methods == NULL) {
+ ctdb_fatal(ctdb, "ctdb_send_dmaster_reply cant update dmaster since transport is down");
return;
}
int len;
uint32_t lmaster = ctdb_lmaster(ctdb, key);
+ if (ctdb->methods == NULL) {
+ ctdb_fatal(ctdb, "Failed ctdb_call_send_dmaster since transport is down");
+ return;
+ }
+
if (lmaster == ctdb->pnn) {
ctdb_send_dmaster_reply(ctdb_db, header, *key, *data,
c->hdr.srcnode, c->hdr.reqid);
struct ctdb_call_state *state;
struct ctdb_context *ctdb = ctdb_db->ctdb;
struct ctdb_ltdb_header header;
+ int ret;
- DEBUG(DEBUG_INFO,("pnn %u dmaster response %08x\n", ctdb->pnn, ctdb_hash(&key)));
+ DEBUG(DEBUG_DEBUG,("pnn %u dmaster response %08x\n", ctdb->pnn, ctdb_hash(&key)));
ZERO_STRUCT(header);
header.rsn = rsn + 1;
if (ctdb_ltdb_store(ctdb_db, key, &header, data) != 0) {
ctdb_fatal(ctdb, "ctdb_reply_dmaster store failed\n");
- ctdb_ltdb_unlock(ctdb_db, key);
+
+ ret = ctdb_ltdb_unlock(ctdb_db, key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
return;
}
if (state == NULL) {
DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_become_dmaster from node %u\n",
ctdb->pnn, hdr->reqid, hdr->srcnode));
- ctdb_ltdb_unlock(ctdb_db, key);
+
+ ret = ctdb_ltdb_unlock(ctdb_db, key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
+ return;
+ }
+
+ if (key.dsize != state->call->key.dsize || memcmp(key.dptr, state->call->key.dptr, key.dsize)) {
+ DEBUG(DEBUG_ERR, ("Got bogus DMASTER packet reqid:%u from node %u. Key does not match key held in matching idr.\n", hdr->reqid, hdr->srcnode));
+
+ ret = ctdb_ltdb_unlock(ctdb_db, key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
return;
}
if (hdr->reqid != state->reqid) {
/* we found a record but it was the wrong one */
DEBUG(DEBUG_ERR, ("Dropped orphan in ctdb_become_dmaster with reqid:%u\n from node %u", hdr->reqid, hdr->srcnode));
- ctdb_ltdb_unlock(ctdb_db, key);
+
+ ret = ctdb_ltdb_unlock(ctdb_db, key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
return;
}
- ctdb_call_local(ctdb_db, &state->call, &header, state, &data, ctdb->pnn);
+ ctdb_call_local(ctdb_db, state->call, &header, state, &data);
- ctdb_ltdb_unlock(ctdb_db, state->call.key);
+ ret = ctdb_ltdb_unlock(ctdb_db, state->call->key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
state->state = CTDB_CALL_DONE;
if (state->async.fn) {
ctdb_fatal(ctdb, "ctdb_req_dmaster to non-lmaster");
}
- DEBUG(DEBUG_INFO,("pnn %u dmaster request on %08x for %u from %u\n",
+ DEBUG(DEBUG_DEBUG,("pnn %u dmaster request on %08x for %u from %u\n",
ctdb->pnn, ctdb_hash(&key), c->dmaster, c->hdr.srcnode));
/* its a protocol error if the sending node is not the current dmaster */
ctdb_become_dmaster(ctdb_db, hdr, key, data, c->rsn);
} else {
ctdb_send_dmaster_reply(ctdb_db, &header, key, data, c->dmaster, hdr->reqid);
- ctdb_ltdb_unlock(ctdb_db, key);
+
+ ret = ctdb_ltdb_unlock(ctdb_db, key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
}
}
struct ctdb_reply_call *r;
int ret, len;
struct ctdb_ltdb_header header;
- struct ctdb_call call;
+ struct ctdb_call *call;
struct ctdb_db_context *ctdb_db;
+ if (ctdb->methods == NULL) {
+ DEBUG(DEBUG_INFO,(__location__ " Failed ctdb_request_call. Transport is DOWN\n"));
+ return;
+ }
+
+
ctdb_db = find_ctdb_db(ctdb, c->db_id);
if (!ctdb_db) {
ctdb_send_error(ctdb, hdr, -1,
return;
}
- call.call_id = c->callid;
- call.key.dptr = c->data;
- call.key.dsize = c->keylen;
- call.call_data.dptr = c->data + c->keylen;
- call.call_data.dsize = c->calldatalen;
+ call = talloc(hdr, struct ctdb_call);
+ CTDB_NO_MEMORY_FATAL(ctdb, call);
+
+ call->call_id = c->callid;
+ call->key.dptr = c->data;
+ call->key.dsize = c->keylen;
+ call->call_data.dptr = c->data + c->keylen;
+ call->call_data.dsize = c->calldatalen;
/* determine if we are the dmaster for this key. This also
fetches the record data (if any), thus avoiding a 2nd fetch of the data
if the call will be answered locally */
- ret = ctdb_ltdb_lock_fetch_requeue(ctdb_db, call.key, &header, hdr, &data,
+ ret = ctdb_ltdb_lock_fetch_requeue(ctdb_db, call->key, &header, hdr, &data,
ctdb_call_input_pkt, ctdb, False);
if (ret == -1) {
ctdb_send_error(ctdb, hdr, ret, "ltdb fetch failed in ctdb_request_call");
requesting node */
if (header.dmaster != ctdb->pnn) {
talloc_free(data.dptr);
- ctdb_call_send_redirect(ctdb, call.key, c, &header);
- ctdb_ltdb_unlock(ctdb_db, call.key);
- return;
- }
+ ctdb_call_send_redirect(ctdb, call->key, c, &header);
- if (c->hopcount > ctdb->statistics.max_hop_count) {
- ctdb->statistics.max_hop_count = c->hopcount;
+ ret = ctdb_ltdb_unlock(ctdb_db, call->key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
+ return;
}
- /* if this nodes has done enough consecutive calls on the same record
- then give them the record
- or if the node requested an immediate migration
- */
- if ( c->hdr.srcnode != ctdb->pnn &&
- ((header.laccessor == c->hdr.srcnode
- && header.lacount >= ctdb->tunable.max_lacount)
- || (c->flags & CTDB_IMMEDIATE_MIGRATION)) ) {
- DEBUG(DEBUG_INFO,("pnn %u starting migration of %08x to %u\n",
- ctdb->pnn, ctdb_hash(&call.key), c->hdr.srcnode));
- ctdb_call_send_dmaster(ctdb_db, c, &header, &call.key, &data);
- talloc_free(data.dptr);
- ctdb_ltdb_unlock(ctdb_db, call.key);
- return;
+ CTDB_UPDATE_STAT(ctdb, max_hop_count, c->hopcount);
+
+ /* Try if possible to migrate the record off to the caller node.
+ * From the clients perspective a fetch of the data is just as
+ * expensive as a migration.
+ */
+ if (c->hdr.srcnode != ctdb->pnn) {
+ if (ctdb_db->transaction_active) {
+ DEBUG(DEBUG_INFO, (__location__ " refusing migration"
+ " of key %s while transaction is active\n",
+ (char *)call->key.dptr));
+ } else {
+ DEBUG(DEBUG_DEBUG,("pnn %u starting migration of %08x to %u\n",
+ ctdb->pnn, ctdb_hash(&(call->key)), c->hdr.srcnode));
+ ctdb_call_send_dmaster(ctdb_db, c, &header, &(call->key), &data);
+ talloc_free(data.dptr);
+
+ ret = ctdb_ltdb_unlock(ctdb_db, call->key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
+ return;
+ }
}
- ctdb_call_local(ctdb_db, &call, &header, hdr, &data, c->hdr.srcnode);
+ ctdb_call_local(ctdb_db, call, &header, hdr, &data);
- ctdb_ltdb_unlock(ctdb_db, call.key);
+ ret = ctdb_ltdb_unlock(ctdb_db, call->key);
+ if (ret != 0) {
+ DEBUG(DEBUG_ERR,(__location__ " ctdb_ltdb_unlock() failed with error %d\n", ret));
+ }
- len = offsetof(struct ctdb_reply_call, data) + call.reply_data.dsize;
+ len = offsetof(struct ctdb_reply_call, data) + call->reply_data.dsize;
r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CALL, len,
struct ctdb_reply_call);
CTDB_NO_MEMORY_FATAL(ctdb, r);
r->hdr.destnode = hdr->srcnode;
r->hdr.reqid = hdr->reqid;
- r->status = call.status;
- r->datalen = call.reply_data.dsize;
- if (call.reply_data.dsize) {
- memcpy(&r->data[0], call.reply_data.dptr, call.reply_data.dsize);
+ r->status = call->status;
+ r->datalen = call->reply_data.dsize;
+ if (call->reply_data.dsize) {
+ memcpy(&r->data[0], call->reply_data.dptr, call->reply_data.dsize);
}
ctdb_queue_packet(ctdb, &r->hdr);
return;
}
- state->call.reply_data.dptr = c->data;
- state->call.reply_data.dsize = c->datalen;
- state->call.status = c->status;
+ state->call->reply_data.dptr = c->data;
+ state->call->reply_data.dsize = c->datalen;
+ state->call->status = c->status;
talloc_steal(state, c);
talloc_steal(state, data->dptr);
state->state = CTDB_CALL_DONE;
- state->call = *call;
+ state->call = talloc(state, struct ctdb_call);
+ CTDB_NO_MEMORY_NULL(ctdb, state->call);
+ *(state->call) = *call;
state->ctdb_db = ctdb_db;
- ret = ctdb_call_local(ctdb_db, &state->call, header, state, data, ctdb->pnn);
+ ret = ctdb_call_local(ctdb_db, state->call, header, state, data);
event_add_timed(ctdb->ev, state, timeval_zero(), call_local_trigger, state);
struct ctdb_call_state *state;
struct ctdb_context *ctdb = ctdb_db->ctdb;
+ if (ctdb->methods == NULL) {
+ DEBUG(DEBUG_INFO,(__location__ " Failed send packet. Transport is down\n"));
+ return NULL;
+ }
+
state = talloc_zero(ctdb_db, struct ctdb_call_state);
CTDB_NO_MEMORY_NULL(ctdb, state);
+ state->call = talloc(state, struct ctdb_call);
+ CTDB_NO_MEMORY_NULL(ctdb, state->call);
+
state->reqid = ctdb_reqid_new(ctdb, state);
state->ctdb_db = ctdb_db;
talloc_set_destructor(state, ctdb_call_destructor);
memcpy(&state->c->data[0], call->key.dptr, call->key.dsize);
memcpy(&state->c->data[call->key.dsize],
call->call_data.dptr, call->call_data.dsize);
- state->call = *call;
- state->call.call_data.dptr = &state->c->data[call->key.dsize];
- state->call.key.dptr = &state->c->data[0];
+ *(state->call) = *call;
+ state->call->call_data.dptr = &state->c->data[call->key.dsize];
+ state->call->key.dptr = &state->c->data[0];
state->state = CTDB_CALL_WAIT;
state->generation = ctdb->vnn_map->generation;
return -1;
}
- if (state->call.reply_data.dsize) {
- call->reply_data.dptr = talloc_memdup(state->ctdb_db->ctdb,
- state->call.reply_data.dptr,
- state->call.reply_data.dsize);
- call->reply_data.dsize = state->call.reply_data.dsize;
+ if (state->call->reply_data.dsize) {
+ call->reply_data.dptr = talloc_memdup(call,
+ state->call->reply_data.dptr,
+ state->call->reply_data.dsize);
+ call->reply_data.dsize = state->call->reply_data.dsize;
} else {
call->reply_data.dptr = NULL;
call->reply_data.dsize = 0;
}
- call->status = state->call.status;
+ call->status = state->call->status;
talloc_free(state);
return 0;
}
{
struct ctdb_req_keepalive *r;
+ if (ctdb->methods == NULL) {
+ DEBUG(DEBUG_INFO,(__location__ " Failed to send keepalive. Transport is DOWN\n"));
+ return;
+ }
+
r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REQ_KEEPALIVE,
sizeof(struct ctdb_req_keepalive),
struct ctdb_req_keepalive);
r->hdr.destnode = destnode;
r->hdr.reqid = 0;
- ctdb->statistics.keepalive_packets_sent++;
+ CTDB_INCREMENT_STAT(ctdb, keepalive_packets_sent);
ctdb_queue_packet(ctdb, &r->hdr);
git.samba.org / sahlberg / ctdb.git / blobdiff