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Cluster: clusterSendFailoverAuthIfNeeded() work in progress.

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This commit is contained in:
antirez 2013-03-13 19:08:03 +01:00
parent 44f6fdab60
commit f59ff6fe61
1 changed files with 31 additions and 4 deletions
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35
src/cluster.c
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@ -1274,16 +1274,43 @@ void clusterRequestFailoverAuth(void) {
clusterBroadcastMessage(payload,totlen);
}
/* If we believe 'sender' is the "first slave" of it's master, reply with
/* If we believe 'node' is the "first slave" of it's master, reply with
* a FAILOVER_AUTH_GRANTED packet.
*
* To be a first slave the sender must:
* 1) Be a slave.
* 2) Its master should be in FAIL state.
* 3) Ordering all the slave IDs for its master by run-id, it should be the
* first (the smallest).
* 3) Ordering all the slaves IDs for its master by run-id, it should be the
* first (the smallest) among the ones not in FAIL / PFAIL state.
*/
void clusterSendFailoverAuthIfNeeded(clusterNode *sender) {
void clusterSendFailoverAuthIfNeeded(clusterNode *node) {
char first[REDIS_CLUSTER_NAMELEN];
clusterNode *master = node->slaveof;
int j;
/* Node is a slave? Its master is down? */
if (!(node->flags & REDIS_NODE_SLAVE) ||
master == NULL ||
!(master->flags & REDIS_NODE_FAIL)) return;
/* Iterate all the master slaves to check what's the first one. */
memset(first,0xff,sizeof(first));
for (j = 0; j < master->numslaves; j++) {
clusterNode *slave = master->slaves[j];
if (slave->flags & (REDIS_NODE_FAIL|REDIS_NODE_PFAIL)) continue;
if (memcmp(slave->name,first,sizeof(first)) < 0) {
memcpy(first,slave->name,sizeof(first));
}
}
/* Is 'node' the first slave? */
if (memcmp(node->name,first,sizeof(first)) != 0) return;
/* We can send the packet. */
/* TODO: send the packet refactoring the code so that we have a
* sendEmtpyPacketWithType() function and broadcastEmptyPacketWithType().
*/
}
/* This function is called if we are a slave node and our master serving