1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Author: Alexander Larsson <alexl@redhat.com>
21 * David Zeuthen <davidz@redhat.com>
29 #include "gunionvolumemonitor.h"
30 #include "gmountprivate.h"
31 #include "giomodule-priv.h"
33 #include "gunixvolumemonitor.h"
35 #include "gnativevolumemonitor.h"
41 struct _GUnionVolumeMonitor {
42 GVolumeMonitor parent;
47 static void g_union_volume_monitor_remove_monitor (GUnionVolumeMonitor *union_monitor,
48 GVolumeMonitor *child_monitor);
51 #define g_union_volume_monitor_get_type _g_union_volume_monitor_get_type
52 G_DEFINE_TYPE (GUnionVolumeMonitor, g_union_volume_monitor, G_TYPE_VOLUME_MONITOR);
55 G_LOCK_DEFINE_STATIC(the_volume_monitor);
56 static GUnionVolumeMonitor *the_volume_monitor = NULL;
59 g_union_volume_monitor_finalize (GObject *object)
61 GUnionVolumeMonitor *monitor;
62 GVolumeMonitor *child_monitor;
64 monitor = G_UNION_VOLUME_MONITOR (object);
66 while (monitor->monitors != NULL) {
67 child_monitor = monitor->monitors->data;
68 g_union_volume_monitor_remove_monitor (monitor,
70 g_object_unref (child_monitor);
74 if (G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->finalize)
75 (*G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->finalize) (object);
79 g_union_volume_monitor_dispose (GObject *object)
81 GUnionVolumeMonitor *monitor;
83 monitor = G_UNION_VOLUME_MONITOR (object);
85 G_LOCK (the_volume_monitor);
86 the_volume_monitor = NULL;
87 G_UNLOCK (the_volume_monitor);
89 if (G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->dispose)
90 (*G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->dispose) (object);
94 get_mounts (GVolumeMonitor *volume_monitor)
96 GUnionVolumeMonitor *monitor;
97 GVolumeMonitor *child_monitor;
101 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
105 G_LOCK (the_volume_monitor);
107 for (l = monitor->monitors; l != NULL; l = l->next)
109 child_monitor = l->data;
111 res = g_list_concat (res, g_volume_monitor_get_mounts (child_monitor));
114 G_UNLOCK (the_volume_monitor);
120 get_volumes (GVolumeMonitor *volume_monitor)
122 GUnionVolumeMonitor *monitor;
123 GVolumeMonitor *child_monitor;
127 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
131 G_LOCK (the_volume_monitor);
133 for (l = monitor->monitors; l != NULL; l = l->next)
135 child_monitor = l->data;
137 res = g_list_concat (res, g_volume_monitor_get_volumes (child_monitor));
140 G_UNLOCK (the_volume_monitor);
146 get_connected_drives (GVolumeMonitor *volume_monitor)
148 GUnionVolumeMonitor *monitor;
149 GVolumeMonitor *child_monitor;
153 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
157 G_LOCK (the_volume_monitor);
159 for (l = monitor->monitors; l != NULL; l = l->next)
161 child_monitor = l->data;
163 res = g_list_concat (res, g_volume_monitor_get_connected_drives (child_monitor));
166 G_UNLOCK (the_volume_monitor);
172 get_volume_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
174 GUnionVolumeMonitor *monitor;
175 GVolumeMonitor *child_monitor;
179 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
183 G_LOCK (the_volume_monitor);
185 for (l = monitor->monitors; l != NULL; l = l->next)
187 child_monitor = l->data;
189 volume = g_volume_monitor_get_volume_for_uuid (child_monitor, uuid);
195 G_UNLOCK (the_volume_monitor);
201 get_mount_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
203 GUnionVolumeMonitor *monitor;
204 GVolumeMonitor *child_monitor;
208 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
212 G_LOCK (the_volume_monitor);
214 for (l = monitor->monitors; l != NULL; l = l->next)
216 child_monitor = l->data;
218 mount = g_volume_monitor_get_mount_for_uuid (child_monitor, uuid);
224 G_UNLOCK (the_volume_monitor);
230 g_union_volume_monitor_class_init (GUnionVolumeMonitorClass *klass)
232 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
233 GVolumeMonitorClass *monitor_class = G_VOLUME_MONITOR_CLASS (klass);
235 gobject_class->finalize = g_union_volume_monitor_finalize;
236 gobject_class->dispose = g_union_volume_monitor_dispose;
238 monitor_class->get_connected_drives = get_connected_drives;
239 monitor_class->get_volumes = get_volumes;
240 monitor_class->get_mounts = get_mounts;
241 monitor_class->get_volume_for_uuid = get_volume_for_uuid;
242 monitor_class->get_mount_for_uuid = get_mount_for_uuid;
246 child_volume_added (GVolumeMonitor *child_monitor,
247 GVolume *child_volume,
248 GUnionVolumeMonitor *union_monitor)
250 g_signal_emit_by_name (union_monitor,
256 child_volume_removed (GVolumeMonitor *child_monitor,
257 GVolume *child_volume,
258 GUnionVolumeMonitor *union_monitor)
260 g_signal_emit_by_name (union_monitor,
266 child_volume_changed (GVolumeMonitor *child_monitor,
267 GVolume *child_volume,
268 GUnionVolumeMonitor *union_monitor)
270 g_signal_emit_by_name (union_monitor,
276 child_mount_added (GVolumeMonitor *child_monitor,
278 GUnionVolumeMonitor *union_monitor)
280 g_signal_emit_by_name (union_monitor,
286 child_mount_removed (GVolumeMonitor *child_monitor,
288 GUnionVolumeMonitor *union_monitor)
290 g_signal_emit_by_name (union_monitor,
296 child_mount_pre_unmount (GVolumeMonitor *child_monitor,
298 GUnionVolumeMonitor *union_monitor)
300 g_signal_emit_by_name (union_monitor,
307 child_mount_changed (GVolumeMonitor *child_monitor,
309 GUnionVolumeMonitor *union_monitor)
311 g_signal_emit_by_name (union_monitor,
317 child_drive_connected (GVolumeMonitor *child_monitor,
319 GUnionVolumeMonitor *union_monitor)
321 g_signal_emit_by_name (union_monitor,
327 child_drive_disconnected (GVolumeMonitor *child_monitor,
329 GUnionVolumeMonitor *union_monitor)
331 g_signal_emit_by_name (union_monitor,
332 "drive_disconnected",
337 child_drive_changed (GVolumeMonitor *child_monitor,
339 GUnionVolumeMonitor *union_monitor)
341 g_signal_emit_by_name (union_monitor,
347 g_union_volume_monitor_add_monitor (GUnionVolumeMonitor *union_monitor,
348 GVolumeMonitor *volume_monitor)
350 if (g_list_find (union_monitor->monitors, volume_monitor))
353 union_monitor->monitors =
354 g_list_prepend (union_monitor->monitors,
355 g_object_ref (volume_monitor));
357 g_signal_connect (volume_monitor, "volume_added", (GCallback)child_volume_added, union_monitor);
358 g_signal_connect (volume_monitor, "volume_removed", (GCallback)child_volume_removed, union_monitor);
359 g_signal_connect (volume_monitor, "volume_changed", (GCallback)child_volume_changed, union_monitor);
360 g_signal_connect (volume_monitor, "mount_added", (GCallback)child_mount_added, union_monitor);
361 g_signal_connect (volume_monitor, "mount_removed", (GCallback)child_mount_removed, union_monitor);
362 g_signal_connect (volume_monitor, "mount_pre_unmount", (GCallback)child_mount_pre_unmount, union_monitor);
363 g_signal_connect (volume_monitor, "mount_changed", (GCallback)child_mount_changed, union_monitor);
364 g_signal_connect (volume_monitor, "drive_connected", (GCallback)child_drive_connected, union_monitor);
365 g_signal_connect (volume_monitor, "drive_disconnected", (GCallback)child_drive_disconnected, union_monitor);
366 g_signal_connect (volume_monitor, "drive_changed", (GCallback)child_drive_changed, union_monitor);
370 g_union_volume_monitor_remove_monitor (GUnionVolumeMonitor *union_monitor,
371 GVolumeMonitor *child_monitor)
375 l = g_list_find (union_monitor->monitors, child_monitor);
379 union_monitor->monitors = g_list_delete_link (union_monitor->monitors, l);
381 g_signal_handlers_disconnect_by_func (child_monitor, child_volume_added, union_monitor);
382 g_signal_handlers_disconnect_by_func (child_monitor, child_volume_removed, union_monitor);
383 g_signal_handlers_disconnect_by_func (child_monitor, child_volume_changed, union_monitor);
384 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_added, union_monitor);
385 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_removed, union_monitor);
386 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_pre_unmount, union_monitor);
387 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_changed, union_monitor);
388 g_signal_handlers_disconnect_by_func (child_monitor, child_drive_connected, union_monitor);
389 g_signal_handlers_disconnect_by_func (child_monitor, child_drive_disconnected, union_monitor);
390 g_signal_handlers_disconnect_by_func (child_monitor, child_drive_changed, union_monitor);
393 /* Note: This compares in reverse order.
394 Higher prio -> sort first
397 compare_monitor_type (gconstpointer a,
401 const GNativeVolumeMonitorClass *class_a, *class_b;
403 const char *use_this_monitor;
407 use_this_monitor = user_data;
409 if (class_a == class_b)
411 else if (use_this_monitor != NULL &&
412 strcmp (class_a->name, use_this_monitor) == 0)
414 else if (use_this_monitor != NULL &&
415 strcmp (class_b->name, use_this_monitor) == 0)
418 res = class_b->priority - class_a->priority;
424 get_default_native_class (gpointer data)
426 GNativeVolumeMonitorClass *klass;
430 GTypeClass *native_class;
431 const char *use_this;
433 GTypeClass **native_class_out;
436 native_class_out = data;
438 use_this = g_getenv ("GIO_USE_VOLUME_MONITOR");
441 /* Ensure GUnixVolumeMonitor type is available */
443 volatile GType unix_type;
444 /* volatile is required to avoid any G_GNUC_CONST optimizations */
445 unix_type = _g_unix_volume_monitor_get_type ();
449 /* Ensure vfs in modules loaded */
450 _g_io_modules_ensure_loaded ();
452 monitors = g_type_children (G_TYPE_NATIVE_VOLUME_MONITOR, &n_monitors);
455 /* Ref all classes once so we don't load/unload them a lot */
456 for (i = 0; i < n_monitors; i++)
457 classes = g_list_prepend (classes, g_type_class_ref (monitors[i]));
461 classes = g_list_sort_with_data (classes,
462 compare_monitor_type,
466 for (l = classes; l != NULL; l = l->next)
470 if (klass->is_supported ())
472 native_class = (GTypeClass *)klass;
476 g_type_class_unref (klass);
481 *native_class_out = native_class;
482 return G_TYPE_FROM_CLASS (native_class);
485 return G_TYPE_INVALID;
488 /* We return the class, with a ref taken.
489 * This way we avoid unloading the class/module
490 * between selecting the type and creating the
491 * instance on the first call.
493 static GNativeVolumeMonitorClass *
496 static GOnce once_init = G_ONCE_INIT;
497 GTypeClass *type_class;
500 g_once (&once_init, (GThreadFunc)get_default_native_class, &type_class);
502 if (type_class == NULL && once_init.retval != G_TYPE_INVALID)
503 type_class = g_type_class_ref ((GType)once_init.retval);
505 return (GNativeVolumeMonitorClass *)type_class;
509 g_union_volume_monitor_init (GUnionVolumeMonitor *union_monitor)
511 GVolumeMonitor *monitor;
514 GNativeVolumeMonitorClass *native_class;
517 native_class = get_native_class ();
519 if (native_class != NULL)
521 monitor = g_object_new (G_TYPE_FROM_CLASS (native_class), NULL);
522 g_union_volume_monitor_add_monitor (union_monitor, monitor);
523 g_object_unref (monitor);
524 g_type_class_unref (native_class);
527 monitors = g_type_children (G_TYPE_VOLUME_MONITOR, &n_monitors);
529 for (i = 0; i < n_monitors; i++)
531 if (monitors[i] == G_TYPE_UNION_VOLUME_MONITOR ||
532 g_type_is_a (monitors[i], G_TYPE_NATIVE_VOLUME_MONITOR))
535 monitor = g_object_new (monitors[i], NULL);
536 g_union_volume_monitor_add_monitor (union_monitor, monitor);
537 g_object_unref (monitor);
543 static GUnionVolumeMonitor *
544 g_union_volume_monitor_new (void)
546 GUnionVolumeMonitor *monitor;
548 monitor = g_object_new (G_TYPE_UNION_VOLUME_MONITOR, NULL);
554 * g_volume_monitor_get:
556 * Gets the volume monitor used by gio.
558 * Returns: a reference to the #GVolumeMonitor used by gio. Call
559 * g_object_unref() when done with it.
562 g_volume_monitor_get (void)
566 G_LOCK (the_volume_monitor);
568 if (the_volume_monitor)
569 vm = G_VOLUME_MONITOR (g_object_ref (the_volume_monitor));
572 the_volume_monitor = g_union_volume_monitor_new ();
573 vm = G_VOLUME_MONITOR (the_volume_monitor);
576 G_UNLOCK (the_volume_monitor);
582 * _g_mount_get_for_mount_path:
583 * @mountpoint: a string.
584 * @cancellable: a #GCancellable, or %NULL
586 * Returns: a #GMount for given @mount_path or %NULL.
589 _g_mount_get_for_mount_path (const char *mount_path,
590 GCancellable *cancellable)
592 GNativeVolumeMonitorClass *klass;
595 klass = get_native_class ();
601 if (klass->get_mount_for_mount_path)
603 G_LOCK (the_volume_monitor);
604 mount = klass->get_mount_for_mount_path (mount_path, cancellable);
605 G_UNLOCK (the_volume_monitor);
608 /* TODO: How do we know this succeeded? Keep in mind that the native
609 * volume monitor may fail (e.g. not being able to connect to
610 * hald). Is the get_mount_for_mount_path() method allowed to
611 * return NULL? Seems like it is ... probably the method needs
612 * to take a boolean and write if it succeeds or not.. Messy.
616 g_type_class_unref (klass);
622 * g_volume_monitor_adopt_orphan_mount:
623 * @mount: a #GMount object to find a parent for
625 * This function should be called by any #GVolumeMonitor
626 * implementation when a new #GMount object is created that is not
627 * associated with a #GVolume object. It must be called just before
628 * emitting the @mount_added signal.
630 * If the return value is not %NULL, the caller must associate the
631 * returned #GVolume object with the #GMount. This involves returning
632 * it in it's g_mount_get_volume() implementation. The caller must
633 * also listen for the "removed" signal on the returned object
634 * and give up it's reference when handling that signal
636 * Similary, if implementing g_volume_monitor_adopt_orphan_mount(),
637 * the implementor must take a reference to @mount and return it in
638 * it's g_volume_get_mount() implemented. Also, the implementor must
639 * listen for the "unmounted" signal on @mount and give up it's
640 * reference upon handling that signal.
642 * There are two main use cases for this function.
644 * One is when implementing a user space file system driver that reads
645 * blocks of a block device that is already represented by the native
646 * volume monitor (for example a CD Audio file system driver). Such
647 * a driver will generate it's own #GMount object that needs to be
648 * assoicated with the #GVolume object that represents the volume.
650 * The other is for implementing a #GVolumeMonitor whose sole purpose
651 * is to return #GVolume objects representing entries in the users
652 * "favorite servers" list or similar.
654 * Returns: the #GVolume object that is the parent for @mount or %NULL
655 * if no wants to adopt the #GMount.
658 g_volume_monitor_adopt_orphan_mount (GMount *mount)
660 GVolumeMonitor *child_monitor;
661 GVolumeMonitorClass *child_monitor_class;
665 g_return_val_if_fail (mount != NULL, NULL);
667 if (the_volume_monitor == NULL)
672 /* TODO: nasty locking issues because current VM's don't emit signals in idle */
674 //G_LOCK (the_volume_monitor);
676 for (l = the_volume_monitor->monitors; l != NULL; l = l->next)
678 child_monitor = l->data;
679 child_monitor_class = G_VOLUME_MONITOR_GET_CLASS (child_monitor);
681 if (child_monitor_class->adopt_orphan_mount != NULL)
683 volume = child_monitor_class->adopt_orphan_mount (mount);
689 //G_UNLOCK (the_volume_monitor);
695 #define __G_UNION_VOLUME_MONITOR_C__
696 #include "gioaliasdef.c"