add replication quorum type and functions

src/sf_configs.c

@@ -119,7 +119,7 @@ int sf_load_read_rule_config_ex(SFDataReadRule *rule,
     return 0;
 }
 
-int sf_load_quorum_config_ex(SFElectionQuorum *quorum,
+int sf_load_election_quorum_config_ex(SFElectionQuorum *quorum,
         IniFullContext *ini_ctx, const SFElectionQuorum def_quorum)
 {
     char *str;
@@ -143,3 +143,28 @@ int sf_load_quorum_config_ex(SFElectionQuorum *quorum,
 
     return 0;
 }
+
+int sf_load_replication_quorum_config_ex(SFReplicationQuorum *quorum,
+        IniFullContext *ini_ctx, const SFReplicationQuorum def_quorum)
+{
+    char *str;
+
+    str = iniGetStrValue(ini_ctx->section_name,
+            "quorum", ini_ctx->context);
+    if (str == NULL) {
+        *quorum = def_quorum;
+    } else if (strncasecmp(str, "auto", 4) == 0) {
+        *quorum = sf_replication_quorum_auto;
+    } else if (strncasecmp(str, "any", 3) == 0) {
+        *quorum = sf_replication_quorum_any;
+    } else if (strncasecmp(str, "majority", 8) == 0) {
+        *quorum = sf_replication_quorum_majority;
+    } else {
+        logError("file: "__FILE__", line: %d, "
+                "config file: %s, unkown quorum: %s",
+                __LINE__, ini_ctx->filename, str);
+        return EINVAL;
+    }
+
+    return 0;
+}

src/sf_configs.h

@@ -85,10 +85,10 @@ static inline const char *sf_get_read_rule_caption(
     }
 }
 
-int sf_load_quorum_config_ex(SFElectionQuorum *quorum,
+int sf_load_election_quorum_config_ex(SFElectionQuorum *quorum,
         IniFullContext *ini_ctx, const SFElectionQuorum def_quorum);
 
-static inline const char *sf_get_quorum_caption(
+static inline const char *sf_get_election_quorum_caption(
         const SFElectionQuorum quorum)
 {
     switch (quorum) {
@@ -124,12 +124,54 @@ static inline bool sf_election_quorum_check(const SFElectionQuorum quorum,
     }
 }
 
+int sf_load_replication_quorum_config_ex(SFReplicationQuorum *quorum,
+        IniFullContext *ini_ctx, const SFReplicationQuorum def_quorum);
+
+static inline const char *sf_get_replication_quorum_caption(
+        const SFReplicationQuorum quorum)
+{
+    switch (quorum) {
+        case sf_replication_quorum_auto:
+            return "auto";
+        case sf_replication_quorum_any:
+            return "any";
+        case sf_replication_quorum_majority:
+            return "majority";
+        default:
+            return "unknown";
+    }
+}
+
+static inline bool sf_replication_quorum_check(const SFReplicationQuorum quorum,
+        const bool vote_node_enabled, const int total_count,
+        const int active_count)
+{
+    switch (quorum) {
+        case sf_replication_quorum_any:
+            return active_count > 0;
+        case sf_replication_quorum_auto:
+            if (total_count % 2 == 0 && !vote_node_enabled) {
+                return active_count > 0;  //same as sf_replication_quorum_any
+            }
+            //continue
+        case sf_replication_quorum_majority:
+            if (active_count == total_count) {
+                return true;
+            } else {
+                return active_count > total_count / 2;
+            }
+    }
+}
+
 #define sf_load_read_rule_config(rule, ini_ctx) \
     sf_load_read_rule_config_ex(rule, ini_ctx, sf_data_read_rule_master_only)
 
-#define sf_load_quorum_config(quorum, ini_ctx) \
-    sf_load_quorum_config_ex(quorum, ini_ctx, sf_election_quorum_auto)
+#define sf_load_election_quorum_config(quorum, ini_ctx) \
+    sf_load_election_quorum_config_ex(quorum, ini_ctx, sf_election_quorum_auto)
 
+#define sf_load_replication_quorum_config(quorum, ini_ctx) \
+    sf_load_replication_quorum_config_ex(quorum, ini_ctx,  \
+            sf_replication_quorum_auto)
 
 #define SF_QUORUM_NEED_REQUEST_VOTE_NODE(quorum, vote_node_enabled, \
         server_count, active_count) \

src/sf_types.h

@@ -250,4 +250,10 @@ typedef enum sf_election_quorum {
     sf_election_quorum_majority,
 } SFElectionQuorum;
 
+typedef enum sf_replication_quorum {
+    sf_replication_quorum_auto,
+    sf_replication_quorum_any,
+    sf_replication_quorum_majority,
+} SFReplicationQuorum;
+
 #endif