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Cluster: broadcast master/slave replication offset in bus header.

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This commit is contained in:
antirez 2014-01-28 16:51:50 +01:00
parent 8b32bd483a
commit befcf6259e
2 changed files with 25 additions and 10 deletions
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33
src/cluster.c
View File

@ -1615,34 +1615,47 @@ void clusterBroadcastMessage(void *buf, size_t len) {
/* Build the message header */
void clusterBuildMessageHdr(clusterMsg *hdr, int type) {
int totlen = 0;
clusterNode *master;
uint64_t offset;
clusterNode *master, *myself = server.cluster->myself;
/* If this node is a master, we send its slots bitmap and configEpoch.
* If this node is a slave we send the master's information instead (the
* node is flagged as slave so the receiver knows that it is NOT really
* in charge for this slots. */
master = (server.cluster->myself->flags & REDIS_NODE_SLAVE &&
server.cluster->myself->slaveof) ?
server.cluster->myself->slaveof : server.cluster->myself;
master = (myself->flags & REDIS_NODE_SLAVE && myself->slaveof) ?
myself->slaveof : myself;
memset(hdr,0,sizeof(*hdr));
hdr->type = htons(type);
memcpy(hdr->sender,server.cluster->myself->name,REDIS_CLUSTER_NAMELEN);
memcpy(hdr->sender,myself->name,REDIS_CLUSTER_NAMELEN);
memcpy(hdr->myslots,master->slots,sizeof(hdr->myslots));
memset(hdr->slaveof,0,REDIS_CLUSTER_NAMELEN);
if (server.cluster->myself->slaveof != NULL) {
memcpy(hdr->slaveof,server.cluster->myself->slaveof->name,
REDIS_CLUSTER_NAMELEN);
}
if (myself->slaveof != NULL)
memcpy(hdr->slaveof,myself->slaveof->name, REDIS_CLUSTER_NAMELEN);
hdr->port = htons(server.port);
hdr->flags = htons(server.cluster->myself->flags);
hdr->flags = htons(myself->flags);
hdr->state = server.cluster->state;
/* Set the currentEpoch and configEpochs. */
hdr->currentEpoch = htonu64(server.cluster->currentEpoch);
hdr->configEpoch = htonu64(master->configEpoch);
/* Set the replication offset. */
if (myself->flags & REDIS_NODE_SLAVE) {
if (server.master)
offset = server.master->reploff;
else if (server.cached_master)
offset = server.cached_master->reploff;
else
offset = 0;
} else {
offset = server.master_repl_offset;
}
hdr->offset = htonu64(offset);
/* Compute the message length for certain messages. For other messages
* this is up to the caller. */
if (type == CLUSTERMSG_TYPE_FAIL) {
totlen = sizeof(clusterMsg)-sizeof(union clusterMsgData);
totlen += sizeof(clusterMsgDataFail);

2
src/cluster.h
View File

@ -178,6 +178,8 @@ typedef struct {
uint64_t configEpoch; /* The config epoch if it's a master, or the last
epoch advertised by its master if it is a
slave. */
uint64_t offset; /* Master replication offset if node is a master or
processed replication offset if node is a slave. */
char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
char slaveof[REDIS_CLUSTER_NAMELEN];