qemu: monitor: Remove legacy monitor commands for FD manipulation

The handlers for 'add-fd' and 'remove-fd' are unused now and riddled
with legacy cruft. Purge them.

Last use was removed in f2019083.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

src/qemu/qemu_monitor.c

@@ -2789,59 +2789,6 @@ qemuMonitorCloseFileHandle(qemuMonitorPtr mon,
 }
 
 
-/* Add the open file descriptor FD into the non-negative set FDSET.
- * If NAME is present, it will be passed along for logging purposes.
- * Returns the counterpart fd that qemu received, or -1 on error.  */
-int
-qemuMonitorAddFd(qemuMonitorPtr mon, int fdset, int fd, const char *name)
-{
-    VIR_DEBUG("fdset=%d, fd=%d, name=%s", fdset, fd, NULLSTR(name));
-
-    QEMU_CHECK_MONITOR(mon);
-
-    if (fd < 0 || fdset < 0) {
-        virReportError(VIR_ERR_INVALID_ARG, "%s",
-                       _("fd and fdset must be valid"));
-        return -1;
-    }
-
-    if (!mon->hasSendFD) {
-        virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
-                       _("qemu is not using a unix socket monitor, "
-                         "cannot send fd %s"), NULLSTR(name));
-        return -1;
-    }
-
-    return qemuMonitorJSONAddFd(mon, fdset, fd, name);
-}
-
-
-/* Remove one of qemu's fds from the given FDSET, or if FD is
- * negative, remove the entire set.  Preserve any previous error on
- * entry.  Returns 0 on success, -1 on error.  */
-int
-qemuMonitorRemoveFd(qemuMonitorPtr mon, int fdset, int fd)
-{
-    int ret = -1;
-    virErrorPtr error;
-
-    VIR_DEBUG("fdset=%d, fd=%d", fdset, fd);
-
-    error = virSaveLastError();
-
-    QEMU_CHECK_MONITOR_GOTO(mon, cleanup);
-
-    ret = qemuMonitorJSONRemoveFd(mon, fdset, fd);
-
- cleanup:
-    if (error) {
-        virSetError(error);
-        virFreeError(error);
-    }
-    return ret;
-}
-
-
 int
 qemuMonitorAddNetdev(qemuMonitorPtr mon,
                      const char *netdevstr,

src/qemu/qemu_monitor.h

@@ -874,14 +874,12 @@ int qemuMonitorGraphicsRelocate(qemuMonitorPtr mon,
 int qemuMonitorSendFileHandle(qemuMonitorPtr mon,
                               const char *fdname,
                               int fd);
-int qemuMonitorAddFd(qemuMonitorPtr mon, int fdset, int fd, const char *name);
 
-/* These two functions preserve previous error and only set their own
+/* This function preserves previous error and only set their own
  * error if no error was set before.
  */
 int qemuMonitorCloseFileHandle(qemuMonitorPtr mon,
                                const char *fdname);
-int qemuMonitorRemoveFd(qemuMonitorPtr mon, int fdset, int fd);
 
 int qemuMonitorAddNetdev(qemuMonitorPtr mon,
                          const char *netdevstr,

src/qemu/qemu_monitor_json.c

@@ -3850,81 +3850,6 @@ int qemuMonitorJSONCloseFileHandle(qemuMonitorPtr mon,
 }
 
 
-int
-qemuMonitorJSONAddFd(qemuMonitorPtr mon, int fdset, int fd, const char *name)
-{
-    int ret;
-    virJSONValuePtr cmd = qemuMonitorJSONMakeCommand("add-fd",
-                                                     "i:fdset-id", fdset,
-                                                     "S:opaque", name,
-                                                     NULL);
-    virJSONValuePtr reply = NULL;
-    if (!cmd)
-        return -1;
-
-    ret = qemuMonitorJSONCommandWithFd(mon, cmd, fd, &reply);
-
-    if (ret == 0) {
-        /* qemu 1.2 lacks the functionality we need; but we have to
-         * probe to find that out.  Don't log errors in that case.  */
-        if (STREQ_NULLABLE(name, "/dev/null") &&
-            qemuMonitorJSONHasError(reply, "GenericError")) {
-            ret = -2;
-            goto cleanup;
-        }
-        ret = qemuMonitorJSONCheckReply(cmd, reply, VIR_JSON_TYPE_OBJECT);
-    }
-    if (ret == 0) {
-        virJSONValuePtr data = virJSONValueObjectGetObject(reply, "return");
-
-        if (virJSONValueObjectGetNumberInt(data, "fd", &ret) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("incomplete return information"));
-            goto error;
-        }
-    }
-
- cleanup:
-    virJSONValueFree(cmd);
-    virJSONValueFree(reply);
-    return ret;
-
- error:
-    /* Best effort cleanup - kill the entire fdset (even if it has
-     * earlier successful fd registrations), since we don't know which
-     * fd qemu got, and don't want to leave the fd leaked in qemu.  */
-    qemuMonitorJSONRemoveFd(mon, fdset, -1);
-    ret = -1;
-    goto cleanup;
-}
-
-
-int
-qemuMonitorJSONRemoveFd(qemuMonitorPtr mon, int fdset, int fd)
-{
-    int ret = -1;
-    virJSONValuePtr cmd = qemuMonitorJSONMakeCommand("remove-fd",
-                                                     "i:fdset-id", fdset,
-                                                     fd < 0 ? NULL : "i:fd",
-                                                     fd, NULL);
-    virJSONValuePtr reply = NULL;
-    if (!cmd)
-        return -1;
-
-    if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
-        goto cleanup;
-
-    if (qemuMonitorJSONCheckError(cmd, reply) < 0)
-        goto cleanup;
-
-    ret = 0;
- cleanup:
-    virJSONValueFree(cmd);
-    virJSONValueFree(reply);
-    return ret;
-}
-
-
 int qemuMonitorJSONAddNetdev(qemuMonitorPtr mon,
                              const char *netdevstr)
 {

src/qemu/qemu_monitor_json.h

@@ -203,12 +203,9 @@ int qemuMonitorJSONRemovePCIDevice(qemuMonitorPtr mon,
 int qemuMonitorJSONSendFileHandle(qemuMonitorPtr mon,
                                   const char *fdname,
                                   int fd);
-int qemuMonitorJSONAddFd(qemuMonitorPtr mon, int fdset, int fd,
-                         const char *name);
 
 int qemuMonitorJSONCloseFileHandle(qemuMonitorPtr mon,
                                    const char *fdname);
-int qemuMonitorJSONRemoveFd(qemuMonitorPtr mon, int fdset, int fd);
 
 int qemuMonitorJSONAddNetdev(qemuMonitorPtr mon,
                              const char *netdevstr);