monitor: add Error * argument to monitor_get_fd

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>

dump.c

@@ -836,9 +836,8 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
 
 #if !defined(WIN32)
     if (strstart(file, "fd:", &p)) {
-        fd = monitor_get_fd(cur_mon, p);
+        fd = monitor_get_fd(cur_mon, p, errp);
         if (fd == -1) {
-            error_set(errp, QERR_FD_NOT_FOUND, p);
             return;
         }
     }

migration-fd.c

@@ -75,7 +75,7 @@ static int fd_close(MigrationState *s)
 
 int fd_start_outgoing_migration(MigrationState *s, const char *fdname)
 {
-    s->fd = monitor_get_fd(cur_mon, fdname);
+    s->fd = monitor_get_fd(cur_mon, fdname, NULL);
     if (s->fd == -1) {
         DPRINTF("fd_migration: invalid file descriptor identifier\n");
         goto err_after_get_fd;

monitor.c

@@ -951,7 +951,7 @@ static int add_graphics_client(Monitor *mon, const QDict *qdict, QObject **ret_d
     CharDriverState *s;
 
     if (strcmp(protocol, "spice") == 0) {
-        int fd = monitor_get_fd(mon, fdname);
+        int fd = monitor_get_fd(mon, fdname, NULL);
         int skipauth = qdict_get_try_bool(qdict, "skipauth", 0);
         int tls = qdict_get_try_bool(qdict, "tls", 0);
         if (!using_spice) {
@@ -965,13 +965,13 @@ static int add_graphics_client(Monitor *mon, const QDict *qdict, QObject **ret_d
         return 0;
 #ifdef CONFIG_VNC
     } else if (strcmp(protocol, "vnc") == 0) {
-	int fd = monitor_get_fd(mon, fdname);
+	int fd = monitor_get_fd(mon, fdname, NULL);
         int skipauth = qdict_get_try_bool(qdict, "skipauth", 0);
 	vnc_display_add_client(NULL, fd, skipauth);
 	return 0;
 #endif
     } else if ((s = qemu_chr_find(protocol)) != NULL) {
-	int fd = monitor_get_fd(mon, fdname);
+	int fd = monitor_get_fd(mon, fdname, NULL);
 	if (qemu_chr_add_client(s, fd) < 0) {
 	    qerror_report(QERR_ADD_CLIENT_FAILED);
 	    return -1;
@@ -2118,7 +2118,7 @@ static void do_loadvm(Monitor *mon, const QDict *qdict)
     }
 }
 
-int monitor_get_fd(Monitor *mon, const char *fdname)
+int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp)
 {
     mon_fd_t *monfd;
 
@@ -2139,6 +2139,7 @@ int monitor_get_fd(Monitor *mon, const char *fdname)
         return fd;
     }
 
+    error_setg(errp, "File descriptor named '%s' has not been found", fdname);
     return -1;
 }
 
@@ -2410,12 +2411,14 @@ int monitor_fdset_dup_fd_remove(int dup_fd)
 int monitor_handle_fd_param(Monitor *mon, const char *fdname)
 {
     int fd;
+    Error *local_err = NULL;
 
     if (!qemu_isdigit(fdname[0]) && mon) {
 
-        fd = monitor_get_fd(mon, fdname);
+        fd = monitor_get_fd(mon, fdname, &local_err);
         if (fd == -1) {
-            error_report("No file descriptor named %s found", fdname);
+            qerror_report_err(local_err);
+            error_free(local_err);
             return -1;
         }
     } else {

monitor.h

@@ -66,7 +66,7 @@ int monitor_read_block_device_key(Monitor *mon, const char *device,
                                   BlockDriverCompletionFunc *completion_cb,
                                   void *opaque);
 
-int monitor_get_fd(Monitor *mon, const char *fdname);
+int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp);
 int monitor_handle_fd_param(Monitor *mon, const char *fdname);
 
 void monitor_vprintf(Monitor *mon, const char *fmt, va_list ap)