/*
* Copy n bytes from memory area pos to mbuf.
*
* The memory areas should not overlap and the mbuf should have
* enough space for n bytes.
*/
void
mbuf_copy(struct mbuf *mbuf, uint8_t *pos, size_t n)
{
if (n == 0) {
return;
}
/* mbuf has space for n bytes */
ASSERT(!mbuf_full(mbuf) && n <= mbuf_size(mbuf));
/* no overlapping copy */
ASSERT(pos < mbuf->start || pos >= mbuf->end);
dn_memcpy(mbuf->last, pos, n);
mbuf->last += n;
}
static rstatus_t
gossip_forward_state(struct server_pool *sp)
{
//assume each record needs maximum 256 bytes
struct ring_msg *msg = create_ring_msg_with_data(256 * node_count);
uint8_t *data = msg->data; //dn_zalloc(sizeof(uint8_t) * 256 * node_count);//msg->data;
uint8_t *pos = data;
dictIterator *dc_it;
dictEntry *dc_de;
dc_it = dictGetIterator(gn_pool.dict_dc);
while ((dc_de = dictNext(dc_it)) != NULL) {
struct gossip_dc *g_dc = dictGetVal(dc_de);
//log_debug(LOG_VERB, "\tDC name : '%.*s'", g_dc->name.len, g_dc->name.data);
dictIterator *rack_it = dictGetIterator(g_dc->dict_rack);
dictEntry *rack_de;
while ((rack_de = dictNext(rack_it)) != NULL) {
struct gossip_rack *g_rack = dictGetVal(rack_de);
//log_debug(LOG_VERB, "\tRack name : '%.*s'", g_rack->name.len, g_rack->name.data);
dictIterator *node_it = dictGetIterator(g_rack->dict_token_nodes);
dictEntry *node_de;
int i = 0;
while ((node_de = dictNext(node_it)) != NULL) {
struct node *gnode = dictGetVal(node_de);
//log_debug(LOG_VERB, "\tNode name : '%.*s'", gnode->name.len, gnode->name.data);
if (i++ > 0) {
//pipe separator
*pos = '|';
pos += 1;
}
//write dc name
dn_memcpy(pos, g_dc->name.data, g_dc->name.len);
pos += g_dc->name.len;
//$ separator
*pos = '$';
pos += 1;
//write rack name
dn_memcpy(pos, g_rack->name.data, g_rack->name.len);
pos += g_rack->name.len;
//$ separator
*pos = '$';
pos += 1;
//write node token
struct string *token_str = dictGetKey(node_de);
//log_debug(LOG_VERB, "\tToken string : '%.*s'", token_str->len, token_str->data);
int k;
for(k=0; k<token_str->len;k++, pos++) {
*pos = *(token_str->data + k);
}
//comma separator
*pos = ',';
pos += 1;
//write ts
int count = 0;
uint64_t ts;
if (gnode->is_local) //only update my own timestamp
ts = (uint64_t) time(NULL);
else ts = gnode->ts;
count = 0;
write_number(pos, ts, &count);
pos += count;
//comma separator
*pos = ',';
pos += 1;
//write state
uint8_t new_state = gossip_failure_detector(gnode);
gnode->state = new_state;
count = 0;
write_number(pos, gnode->state, &count);
pos += count;
//comma separator
*pos = ',';
pos += 1;
//write addresss
for(k=0; k<gnode->name.len; k++, pos++) {
*pos = *(gnode->name.data + k);
}
}
dictReleaseIterator(node_it);
}
dictReleaseIterator(rack_it);
}
msg->len = pos-data;
log_debug(LOG_VERB, "\tForwarding my current gossip states : '%.*s'", (pos-data), data);
dictReleaseIterator(dc_it);
return gossip_ring_msg_to_core(sp, msg, dnode_peer_forward_state);
}