-/*-----------------------------------------------------------------------------
- * Redis cluster data structures
- *----------------------------------------------------------------------------*/
-
-#define REDIS_CLUSTER_SLOTS 4096
-#define REDIS_CLUSTER_OK 0 /* Everything looks ok */
-#define REDIS_CLUSTER_FAIL 1 /* The cluster can't work */
-#define REDIS_CLUSTER_NEEDHELP 2 /* The cluster works, but needs some help */
-#define REDIS_CLUSTER_NAMELEN 40 /* sha1 hex length */
-#define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
-
-struct clusterNode;
-
-/* clusterLink encapsulates everything needed to talk with a remote node. */
-typedef struct clusterLink {
- int fd; /* TCP socket file descriptor */
- sds sndbuf; /* Packet send buffer */
- sds rcvbuf; /* Packet reception buffer */
- struct clusterNode *node; /* Node related to this link if any, or NULL */
-} clusterLink;
-
-/* Node flags */
-#define REDIS_NODE_MASTER 1 /* The node is a master */
-#define REDIS_NODE_SLAVE 2 /* The node is a slave */
-#define REDIS_NODE_PFAIL 4 /* Failure? Need acknowledge */
-#define REDIS_NODE_FAIL 8 /* The node is believed to be malfunctioning */
-#define REDIS_NODE_MYSELF 16 /* This node is myself */
-#define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
-#define REDIS_NODE_NOADDR 64 /* We don't know the address of this node */
-#define REDIS_NODE_MEET 128 /* Send a MEET message to this node */
-#define REDIS_NODE_NULL_NAME "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
-
-struct clusterNode {
- char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
- int flags; /* REDIS_NODE_... */
- unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
- int numslaves; /* Number of slave nodes, if this is a master */
- struct clusterNode **slaves; /* pointers to slave nodes */
- struct clusterNode *slaveof; /* pointer to the master node */
- time_t ping_sent; /* Unix time we sent latest ping */
- time_t pong_received; /* Unix time we received the pong */
- char *configdigest; /* Configuration digest of this node */
- time_t configdigest_ts; /* Configuration digest timestamp */
- char ip[16]; /* Latest known IP address of this node */
- int port; /* Latest known port of this node */
- clusterLink *link; /* TCP/IP link with this node */
-};
-typedef struct clusterNode clusterNode;
-
-typedef struct {
- char *configfile;
- clusterNode *myself; /* This node */
- int state; /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
- int node_timeout;
- dict *nodes; /* Hash table of name -> clusterNode structures */
- clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
- clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
- clusterNode *slots[REDIS_CLUSTER_SLOTS];
- zskiplist *slots_to_keys;
-} clusterState;
-
-/* Redis cluster messages header */
-
-/* Note that the PING, PONG and MEET messages are actually the same exact
- * kind of packet. PONG is the reply to ping, in the extact format as a PING,
- * while MEET is a special PING that forces the receiver to add the sender
- * as a node (if it is not already in the list). */
-#define CLUSTERMSG_TYPE_PING 0 /* Ping */
-#define CLUSTERMSG_TYPE_PONG 1 /* Pong (reply to Ping) */
-#define CLUSTERMSG_TYPE_MEET 2 /* Meet "let's join" message */
-#define CLUSTERMSG_TYPE_FAIL 3 /* Mark node xxx as failing */
-#define CLUSTERMSG_TYPE_PUBLISH 4 /* Pub/Sub Publish propatagion */
-
-/* Initially we don't know our "name", but we'll find it once we connect
- * to the first node, using the getsockname() function. Then we'll use this
- * address for all the next messages. */
-typedef struct {
- char nodename[REDIS_CLUSTER_NAMELEN];
- uint32_t ping_sent;
- uint32_t pong_received;
- char ip[16]; /* IP address last time it was seen */
- uint16_t port; /* port last time it was seen */
- uint16_t flags;
- uint32_t notused; /* for 64 bit alignment */
-} clusterMsgDataGossip;
-
-typedef struct {
- char nodename[REDIS_CLUSTER_NAMELEN];
-} clusterMsgDataFail;
-
-typedef struct {
- uint32_t channel_len;
- uint32_t message_len;
- unsigned char bulk_data[8]; /* defined as 8 just for alignment concerns. */
-} clusterMsgDataPublish;
-
-union clusterMsgData {
- /* PING, MEET and PONG */
- struct {
- /* Array of N clusterMsgDataGossip structures */
- clusterMsgDataGossip gossip[1];
- } ping;
-
- /* FAIL */
- struct {
- clusterMsgDataFail about;
- } fail;
-
- /* PUBLISH */
- struct {
- clusterMsgDataPublish msg;
- } publish;
-};
-
-typedef struct {
- uint32_t totlen; /* Total length of this message */
- uint16_t type; /* Message type */
- uint16_t count; /* Only used for some kind of messages. */
- char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
- unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
- char slaveof[REDIS_CLUSTER_NAMELEN];
- char configdigest[32];
- uint16_t port; /* Sender TCP base port */
- unsigned char state; /* Cluster state from the POV of the sender */
- unsigned char notused[5]; /* Reserved for future use. For alignment. */
- union clusterMsgData data;
-} clusterMsg;
-
projects / redis.git / blobdiff