Merge branch 'master' of https://bitbucket.org/ckolivas/ckpool

src/ckpool.c

@@ -495,11 +495,13 @@ void empty_buffer(connsock_t *cs)
 /* Read from a socket into cs->buf till we get an '\n', converting it to '\0'
  * and storing how much extra data we've received, to be moved to the beginning
  * of the buffer for use on the next receive. */
-int read_socket_line(connsock_t *cs, const int timeout)
+int read_socket_line(connsock_t *cs, float timeout)
 {
 	int fd = cs->fd, ret = -1;
 	char *eom = NULL;
+	tv_t start, now;
 	size_t buflen;
+	float diff;
 
 	if (unlikely(fd < 0))
 		goto out;
@@ -515,28 +517,35 @@ int read_socket_line(connsock_t *cs, const int timeout)
 		eom = strchr(cs->buf, '\n');
 	}
 
+	tv_time(&start);
+rewait:
+	ret = wait_read_select(fd, eom ? 0 : timeout);
+	if (ret < 1) {
+		if (!ret) {
+			if (eom)
+				goto parse;
+			LOGDEBUG("Select timed out in read_socket_line");
+		} else
+			LOGERR("Select failed in read_socket_line");
+		goto out;
+	}
+	tv_time(&now);
+	diff = tvdiff(&now, &start);
+	timeout -= diff;
 	while (42) {
 		char readbuf[PAGESIZE] = {};
 		int backoff = 1;
 		char *newbuf;
 
-		ret = wait_read_select(fd, eom ? 0 : timeout);
-		if (ret < 1) {
-			if (eom)
-				break;
-			if (!ret)
-				LOGDEBUG("Select timed out in read_socket_line");
-			else
-				LOGERR("Select failed in read_socket_line");
-			goto out;
-		}
-		ret = recv(fd, readbuf, PAGESIZE - 4, 0);
+		ret = recv(fd, readbuf, PAGESIZE - 4, MSG_DONTWAIT);
 		if (ret < 1) {
-			/* Closed socket after valid message */
+			/* No more to read or closed socket after valid message */
 			if (eom)
 				break;
+			/* Have we used up all the timeout yet? */
+			if (timeout > 0 && (errno == EAGAIN || errno == EWOULDBLOCK || !ret))
+				goto rewait;
 			LOGERR("Failed to recv in read_socket_line");
-			ret = -1;
 			goto out;
 		}
 		buflen = cs->bufofs + ret + 1;
@@ -557,6 +566,7 @@ int read_socket_line(connsock_t *cs, const int timeout)
 		cs->buf[cs->bufofs] = '\0';
 		eom = strchr(cs->buf, '\n');
 	}
+parse:
 	ret = eom - cs->buf;
 
 	cs->buflen = cs->buf + cs->bufofs - eom - 1;

src/ckpool.h

@@ -242,7 +242,7 @@ ckpool_t *global_ckp;
 
 bool ping_main(ckpool_t *ckp);
 void empty_buffer(connsock_t *cs);
-int read_socket_line(connsock_t *cs, const int timeout);
+int read_socket_line(connsock_t *cs, float timeout);
 void _send_proc(proc_instance_t *pi, const char *msg, const char *file, const char *func, const int line);
 #define send_proc(pi, msg) _send_proc(pi, msg, __FILE__, __func__, __LINE__)
 char *_send_recv_proc(proc_instance_t *pi, const char *msg, const char *file, const char *func, const int line);

src/connector.c

@@ -24,6 +24,7 @@
 #define MAX_MSGSIZE 1024
 
 typedef struct client_instance client_instance_t;
+typedef struct sender_send sender_send_t;
 
 struct client_instance {
 	/* For clients hashtable */
@@ -53,6 +54,8 @@ struct client_instance {
 	char buf[PAGESIZE];
 	int bufofs;
 
+	/* Are we currently sending a blocked message from this client */
+	sender_send_t *sending;
 	bool passthrough;
 };
 
@@ -66,8 +69,6 @@ struct sender_send {
 	int ofs;
 };
 
-typedef struct sender_send sender_send_t;
-
 /* Private data for the connector */
 struct connector_data {
 	ckpool_t *ckp;
@@ -557,7 +558,12 @@ static bool send_sender_send(ckpool_t *ckp, cdata_t *cdata, sender_send_t *sende
 	client_instance_t *client = sender_send->client;
 
 	if (unlikely(client->invalid))
-		return true;
+		goto out_true;
+
+	/* Make sure we only send one message at a time to each client */
+	if (unlikely(client->sending && client->sending != sender_send))
+		return false;
+	client->sending = sender_send;
 
 	while (sender_send->len) {
 		int ret = write(client->fd, sender_send->buf + sender_send->ofs, sender_send->len);
@@ -568,11 +574,13 @@ static bool send_sender_send(ckpool_t *ckp, cdata_t *cdata, sender_send_t *sende
 			LOGINFO("Client id %"PRId64" fd %d disconnected with write errno %d:%s",
 				client->id, client->fd, errno, strerror(errno));
 			invalidate_client(ckp, cdata, client);
-			return true;
+			goto out_true;
 		}
 		sender_send->ofs += ret;
 		sender_send->len -= ret;
 	}
+out_true:
+	client->sending = NULL;
 	return true;
 }
 

src/libckpool.c

@@ -903,7 +903,7 @@ int wait_close(int sockd, int timeout)
 }
 
 /* Emulate a select read wait for high fds that select doesn't support */
-int wait_read_select(int sockd, int timeout)
+int wait_read_select(int sockd, float timeout)
 {
 	struct pollfd sfd;
 	int ret = -1;
@@ -985,7 +985,7 @@ out:
 }
 
 /* Emulate a select write wait for high fds that select doesn't support */
-int wait_write_select(int sockd, int timeout)
+int wait_write_select(int sockd, float timeout)
 {
 	struct pollfd sfd;
 	int ret = -1;

src/libckpool.h

@@ -490,7 +490,7 @@ int _open_unix_server(const char *server_path, const char *file, const char *fun
 int _open_unix_client(const char *server_path, const char *file, const char *func, const int line);
 #define open_unix_client(server_path) _open_unix_client(server_path, __FILE__, __func__, __LINE__)
 int wait_close(int sockd, int timeout);
-int wait_read_select(int sockd, int timeout);
+int wait_read_select(int sockd, float timeout);
 int read_length(int sockd, void *buf, int len);
 char *_recv_unix_msg(int sockd, int timeout1, int timeout2, const char *file, const char *func, const int line);
 #define RECV_UNIX_TIMEOUT1 30
@@ -498,7 +498,7 @@ char *_recv_unix_msg(int sockd, int timeout1, int timeout2, const char *file, co
 #define recv_unix_msg(sockd) _recv_unix_msg(sockd, RECV_UNIX_TIMEOUT1, RECV_UNIX_TIMEOUT2, __FILE__, __func__, __LINE__)
 #define recv_unix_msg_tmo(sockd, tmo) _recv_unix_msg(sockd, tmo, RECV_UNIX_TIMEOUT2, __FILE__, __func__, __LINE__)
 #define recv_unix_msg_tmo2(sockd, tmo1, tmo2) _recv_unix_msg(sockd, tmo1, tmo2, __FILE__, __func__, __LINE__)
-int wait_write_select(int sockd, int timeout);
+int wait_write_select(int sockd, float timeout);
 int write_length(int sockd, const void *buf, int len);
 bool _send_unix_msg(int sockd, const char *buf, const char *file, const char *func, const int line);
 #define send_unix_msg(sockd, buf) _send_unix_msg(sockd, buf, __FILE__, __func__, __LINE__)