From b075621fb7d8b44b10d849e8db6db9b2498056ad Mon Sep 17 00:00:00 2001
From: Pieter Noordhuis <pcnoordhuis@gmail.com>
Date: Sun, 22 May 2011 12:41:24 +0200
Subject: [PATCH] Minor changes in non-blocking repl. connect
---
src/redis.h | 6 +++---
src/replication.c | 29 +++++++++++++++++------------
2 files changed, 20 insertions(+), 15 deletions(-)
diff --git a/src/redis.h b/src/redis.h
index d6b99cea..19f0b516 100644
--- a/src/redis.h
+++ b/src/redis.h
@@ -155,9 +155,9 @@
/* Slave replication state - slave side */
#define REDIS_REPL_NONE 0 /* No active replication */
#define REDIS_REPL_CONNECT 1 /* Must connect to master */
-#define REDIS_REPL_TRANSFER 2 /* Receiving .rdb from master */
-#define REDIS_REPL_CONNECTED 3 /* Connected to master */
-#define REDIS_REPL_CONNECTING 4 /* Connecting to master */
+#define REDIS_REPL_CONNECTING 2 /* Connecting to master */
+#define REDIS_REPL_TRANSFER 3 /* Receiving .rdb from master */
+#define REDIS_REPL_CONNECTED 4 /* Connected to master */
/* Slave replication state - from the point of view of master
* Note that in SEND_BULK and ONLINE state the slave receives new updates
diff --git a/src/replication.c b/src/replication.c
index c3ddd2d3..851a40f8 100644
--- a/src/replication.c
+++ b/src/replication.c
@@ -319,15 +319,14 @@ void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
redisLog(REDIS_WARNING,
"I/O error reading bulk count from MASTER: %s",
strerror(errno));
- replicationAbortSyncTransfer();
- return;
+ goto error;
}
+
if (buf[0] == '-') {
redisLog(REDIS_WARNING,
"MASTER aborted replication with an error: %s",
buf+1);
- replicationAbortSyncTransfer();
- return;
+ goto error;
} else if (buf[0] == '\0') {
/* At this stage just a newline works as a PING in order to take
* the connection live. So we refresh our last interaction
@@ -336,8 +335,7 @@ void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
return;
} else if (buf[0] != '$') {
redisLog(REDIS_WARNING,"Bad protocol from MASTER, the first byte is not '$', are you sure the host and port are right?");
- replicationAbortSyncTransfer();
- return;
+ goto error;
}
server.repl_transfer_left = strtol(buf+1,NULL,10);
redisLog(REDIS_NOTICE,
@@ -359,8 +357,7 @@ void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
server.repl_transfer_lastio = time(NULL);
if (write(server.repl_transfer_fd,buf,nread) != nread) {
redisLog(REDIS_WARNING,"Write error or short write writing to the DB dump file needed for MASTER <-> SLAVE synchrnonization: %s", strerror(errno));
- replicationAbortSyncTransfer();
- return;
+ goto error;
}
server.repl_transfer_left -= nread;
/* Check if the transfer is now complete */
@@ -391,6 +388,12 @@ void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
server.replstate = REDIS_REPL_CONNECTED;
redisLog(REDIS_NOTICE, "MASTER <-> SLAVE sync: Finished with success");
}
+
+ return;
+
+error:
+ replicationAbortSyncTransfer();
+ return;
}
void syncWithMaster(aeEventLoop *el, int fd, void *privdata, int mask) {
@@ -400,8 +403,10 @@ void syncWithMaster(aeEventLoop *el, int fd, void *privdata, int mask) {
REDIS_NOTUSED(privdata);
REDIS_NOTUSED(mask);
- /* Remove this event before anything else. */
- aeDeleteFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE);
+ /* This event should only be triggered once since it is used to have a
+ * non-blocking connect(2) to the master. It has been triggered when this
+ * function is called, so we can delete it. */
+ aeDeleteFileEvent(server.el,fd,AE_WRITABLE);
/* AUTH with the master if required. */
if(server.masterauth) {
@@ -477,8 +482,8 @@ int connectWithMaster(void) {
return REDIS_ERR;
}
- if (aeCreateFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE,
- syncWithMaster,NULL) == AE_ERR)
+ if (aeCreateFileEvent(server.el,fd,AE_WRITABLE,syncWithMaster,NULL) ==
+ AE_ERR)
{
close(fd);
redisLog(REDIS_WARNING,"Can't create readable event for SYNC");