File pacemaker-report-meaningful-async-connection-errors.patch of Package pacemaker.8397

commit 459e71b2d6537fe308ca1533634f38129dee1557
Author: Ken Gaillot <kgaillot@redhat.com>
Date:   Wed Oct 25 17:49:53 2017 -0500

    Low: libcrmcommon,liblrmd: report meaningful async connection errors
    
    For errors, report_async_connection_result() would set connection_rc to -errno
    sometimes, and -1 other times. Now, it always uses -errno.

diff --git a/lib/common/remote.c b/lib/common/remote.c
index 3f423e5cb..c84238dc2 100644
--- a/lib/common/remote.c
+++ b/lib/common/remote.c
@@ -835,13 +835,21 @@ internal_tcp_connect(int sock, const struct sockaddr *addr, socklen_t addrlen)
 
 /*!
  * \internal
- * \brief tcp connection to server at specified port
- * \retval negative, failed to connect.
- * \retval positive, sock fd
+ * \brief Connect to server at specified TCP port
+ *
+ * \param[in]  host      Name of server to connect to
+ * \param[in]  port      Server port to connect to
+ * \param[in]  timeout   Report error if not connected in this many milliseconds
+ * \param[out] timer_id  If non-NULL, will be set to timer ID, if asynchronous
+ * \param[in]  userdata  Data to pass to callback, if asynchronous
+ * \param[in]  callback  If non-NULL, connect asynchronously then call this
+ *
+ * \return File descriptor of connected socket on success, -ENOTCONN otherwise
  */
 int
-crm_remote_tcp_connect_async(const char *host, int port, int timeout, /*ms */
-                             int *timer_id, void *userdata, void (*callback) (void *userdata, int sock))
+crm_remote_tcp_connect_async(const char *host, int port, int timeout,
+                             int *timer_id, void *userdata,
+                             void (*callback) (void *userdata, int sock))
 {
     char buffer[INET6_ADDRSTRLEN];
     struct addrinfo *res = NULL;
@@ -849,7 +857,7 @@ crm_remote_tcp_connect_async(const char *host, int port, int timeout, /*ms */
     struct addrinfo hints;
     const char *server = host;
     int ret_ga;
-    int sock = -1;
+    int sock = -ENOTCONN;
 
     // Get host's IP address(es)
     memset(&hints, 0, sizeof(struct addrinfo));
@@ -884,6 +892,7 @@ crm_remote_tcp_connect_async(const char *host, int port, int timeout, /*ms */
         if (sock == -1) {
             crm_perror(LOG_WARNING, "creating socket for connection to %s",
                        server);
+            sock = -ENOTCONN;
             continue;
         }
 
@@ -910,7 +919,7 @@ crm_remote_tcp_connect_async(const char *host, int port, int timeout, /*ms */
         }
 
         close(sock);
-        sock = -1;
+        sock = -ENOTCONN;
     }
 
 async_cleanup:
diff --git a/lib/lrmd/lrmd_client.c b/lib/lrmd/lrmd_client.c
index 828133bc3..44b7f2ace 100644
--- a/lib/lrmd/lrmd_client.c
+++ b/lib/lrmd/lrmd_client.c
@@ -1078,27 +1078,23 @@ set_key(gnutls_datum_t * key, const char *location)
 int
 lrmd_tls_set_key(gnutls_datum_t * key)
 {
-    int rc = 0;
     const char *specific_location = getenv("PCMK_authkey_location");
 
     if (set_key(key, specific_location) == 0) {
         crm_debug("Using custom authkey location %s", specific_location);
-        return 0;
+        return pcmk_ok;
 
     } else if (specific_location) {
         crm_err("No valid lrmd remote key found at %s, trying default location", specific_location);
     }
 
-    if (set_key(key, DEFAULT_REMOTE_KEY_LOCATION) != 0) {
-        rc = set_key(key, ALT_REMOTE_KEY_LOCATION);
-    }
-
-    if (rc) {
+    if ((set_key(key, DEFAULT_REMOTE_KEY_LOCATION) != 0)
+        && (set_key(key, ALT_REMOTE_KEY_LOCATION) != 0)) {
         crm_err("No valid lrmd remote key found at %s", DEFAULT_REMOTE_KEY_LOCATION);
-        return -1;
+        return -ENOKEY;
     }
 
-    return rc;
+    return pcmk_ok;
 }
 
 static void
@@ -1179,7 +1175,7 @@ lrmd_tcp_connect_cb(void *userdata, int sock)
         gnutls_free(native->remote->tls_session);
         native->remote->tls_session = NULL;
         lrmd_tls_connection_destroy(lrmd);
-        report_async_connection_result(lrmd, -1);
+        report_async_connection_result(lrmd, -EKEYREJECTED);
         return;
     }
 
@@ -1224,6 +1220,7 @@ lrmd_tls_connect(lrmd_t * lrmd, int *fd)
         .dispatch = lrmd_tls_dispatch,
         .destroy = lrmd_tls_connection_destroy,
     };
+    int rc;
 
     lrmd_private_t *native = lrmd->private;
     int sock;
@@ -1240,9 +1237,10 @@ lrmd_tls_connect(lrmd_t * lrmd, int *fd)
 
     native->sock = sock;
 
-    if (lrmd_tls_set_key(&psk_key) != 0) {
+    rc = lrmd_tls_set_key(&psk_key);
+    if (rc < 0) {
         lrmd_tls_connection_destroy(lrmd);
-        return -1;
+        return rc;
     }
 
     gnutls_psk_allocate_client_credentials(&native->psk_cred_c);
@@ -1257,7 +1255,7 @@ lrmd_tls_connect(lrmd_t * lrmd, int *fd)
         gnutls_free(native->remote->tls_session);
         native->remote->tls_session = NULL;
         lrmd_tls_connection_destroy(lrmd);
-        return -1;
+        return -EKEYREJECTED;
     }
 
     crm_info("Remote lrmd client TLS connection established with server %s:%d", native->server,