/* GIO - GLib Input, Output and Streaming Library * * Copyright (C) 2006-2007 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General * Public License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307, USA. * * Author: Alexander Larsson * David Zeuthen */ #include #include #include #include "gunionvolumemonitor.h" #include "gmountprivate.h" #include "giomodule-priv.h" #ifdef G_OS_UNIX #include "gunixvolumemonitor.h" #endif #include "gnativevolumemonitor.h" #include "glibintl.h" #include "gioalias.h" struct _GUnionVolumeMonitor { GVolumeMonitor parent; GList *monitors; }; static void g_union_volume_monitor_remove_monitor (GUnionVolumeMonitor *union_monitor, GVolumeMonitor *child_monitor); #define g_union_volume_monitor_get_type _g_union_volume_monitor_get_type G_DEFINE_TYPE (GUnionVolumeMonitor, g_union_volume_monitor, G_TYPE_VOLUME_MONITOR); G_LOCK_DEFINE_STATIC(the_volume_monitor); static GUnionVolumeMonitor *the_volume_monitor = NULL; static void g_union_volume_monitor_finalize (GObject *object) { GUnionVolumeMonitor *monitor; GVolumeMonitor *child_monitor; monitor = G_UNION_VOLUME_MONITOR (object); while (monitor->monitors != NULL) { child_monitor = monitor->monitors->data; g_union_volume_monitor_remove_monitor (monitor, child_monitor); g_object_unref (child_monitor); } if (G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->finalize) (*G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->finalize) (object); } static void g_union_volume_monitor_dispose (GObject *object) { GUnionVolumeMonitor *monitor; monitor = G_UNION_VOLUME_MONITOR (object); G_LOCK (the_volume_monitor); the_volume_monitor = NULL; G_UNLOCK (the_volume_monitor); if (G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->dispose) (*G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->dispose) (object); } static GList * get_mounts (GVolumeMonitor *volume_monitor) { GUnionVolumeMonitor *monitor; GVolumeMonitor *child_monitor; GList *res; GList *l; monitor = G_UNION_VOLUME_MONITOR (volume_monitor); res = NULL; G_LOCK (the_volume_monitor); for (l = monitor->monitors; l != NULL; l = l->next) { child_monitor = l->data; res = g_list_concat (res, g_volume_monitor_get_mounts (child_monitor)); } G_UNLOCK (the_volume_monitor); return res; } static GList * get_volumes (GVolumeMonitor *volume_monitor) { GUnionVolumeMonitor *monitor; GVolumeMonitor *child_monitor; GList *res; GList *l; monitor = G_UNION_VOLUME_MONITOR (volume_monitor); res = NULL; G_LOCK (the_volume_monitor); for (l = monitor->monitors; l != NULL; l = l->next) { child_monitor = l->data; res = g_list_concat (res, g_volume_monitor_get_volumes (child_monitor)); } G_UNLOCK (the_volume_monitor); return res; } static GList * get_connected_drives (GVolumeMonitor *volume_monitor) { GUnionVolumeMonitor *monitor; GVolumeMonitor *child_monitor; GList *res; GList *l; monitor = G_UNION_VOLUME_MONITOR (volume_monitor); res = NULL; G_LOCK (the_volume_monitor); for (l = monitor->monitors; l != NULL; l = l->next) { child_monitor = l->data; res = g_list_concat (res, g_volume_monitor_get_connected_drives (child_monitor)); } G_UNLOCK (the_volume_monitor); return res; } static GVolume * get_volume_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid) { GUnionVolumeMonitor *monitor; GVolumeMonitor *child_monitor; GVolume *volume; GList *l; monitor = G_UNION_VOLUME_MONITOR (volume_monitor); volume = NULL; G_LOCK (the_volume_monitor); for (l = monitor->monitors; l != NULL; l = l->next) { child_monitor = l->data; volume = g_volume_monitor_get_volume_for_uuid (child_monitor, uuid); if (volume != NULL) break; } G_UNLOCK (the_volume_monitor); return volume; } static GMount * get_mount_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid) { GUnionVolumeMonitor *monitor; GVolumeMonitor *child_monitor; GMount *mount; GList *l; monitor = G_UNION_VOLUME_MONITOR (volume_monitor); mount = NULL; G_LOCK (the_volume_monitor); for (l = monitor->monitors; l != NULL; l = l->next) { child_monitor = l->data; mount = g_volume_monitor_get_mount_for_uuid (child_monitor, uuid); if (mount != NULL) break; } G_UNLOCK (the_volume_monitor); return mount; } static void g_union_volume_monitor_class_init (GUnionVolumeMonitorClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GVolumeMonitorClass *monitor_class = G_VOLUME_MONITOR_CLASS (klass); gobject_class->finalize = g_union_volume_monitor_finalize; gobject_class->dispose = g_union_volume_monitor_dispose; monitor_class->get_connected_drives = get_connected_drives; monitor_class->get_volumes = get_volumes; monitor_class->get_mounts = get_mounts; monitor_class->get_volume_for_uuid = get_volume_for_uuid; monitor_class->get_mount_for_uuid = get_mount_for_uuid; } static void child_volume_added (GVolumeMonitor *child_monitor, GVolume *child_volume, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "volume_added", child_volume); } static void child_volume_removed (GVolumeMonitor *child_monitor, GVolume *child_volume, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "volume_removed", child_volume); } static void child_volume_changed (GVolumeMonitor *child_monitor, GVolume *child_volume, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "volume_changed", child_volume); } static void child_mount_added (GVolumeMonitor *child_monitor, GMount *child_mount, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "mount_added", child_mount); } static void child_mount_removed (GVolumeMonitor *child_monitor, GMount *child_mount, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "mount_removed", child_mount); } static void child_mount_pre_unmount (GVolumeMonitor *child_monitor, GMount *child_mount, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "mount_pre_unmount", child_mount); } static void child_mount_changed (GVolumeMonitor *child_monitor, GMount *child_mount, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "mount_changed", child_mount); } static void child_drive_connected (GVolumeMonitor *child_monitor, GDrive *child_drive, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "drive_connected", child_drive); } static void child_drive_disconnected (GVolumeMonitor *child_monitor, GDrive *child_drive, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "drive_disconnected", child_drive); } static void child_drive_changed (GVolumeMonitor *child_monitor, GDrive *child_drive, GUnionVolumeMonitor *union_monitor) { g_signal_emit_by_name (union_monitor, "drive_changed", child_drive); } static void g_union_volume_monitor_add_monitor (GUnionVolumeMonitor *union_monitor, GVolumeMonitor *volume_monitor) { if (g_list_find (union_monitor->monitors, volume_monitor)) return; union_monitor->monitors = g_list_prepend (union_monitor->monitors, g_object_ref (volume_monitor)); g_signal_connect (volume_monitor, "volume_added", (GCallback)child_volume_added, union_monitor); g_signal_connect (volume_monitor, "volume_removed", (GCallback)child_volume_removed, union_monitor); g_signal_connect (volume_monitor, "volume_changed", (GCallback)child_volume_changed, union_monitor); g_signal_connect (volume_monitor, "mount_added", (GCallback)child_mount_added, union_monitor); g_signal_connect (volume_monitor, "mount_removed", (GCallback)child_mount_removed, union_monitor); g_signal_connect (volume_monitor, "mount_pre_unmount", (GCallback)child_mount_pre_unmount, union_monitor); g_signal_connect (volume_monitor, "mount_changed", (GCallback)child_mount_changed, union_monitor); g_signal_connect (volume_monitor, "drive_connected", (GCallback)child_drive_connected, union_monitor); g_signal_connect (volume_monitor, "drive_disconnected", (GCallback)child_drive_disconnected, union_monitor); g_signal_connect (volume_monitor, "drive_changed", (GCallback)child_drive_changed, union_monitor); } static void g_union_volume_monitor_remove_monitor (GUnionVolumeMonitor *union_monitor, GVolumeMonitor *child_monitor) { GList *l; l = g_list_find (union_monitor->monitors, child_monitor); if (l == NULL) return; union_monitor->monitors = g_list_delete_link (union_monitor->monitors, l); g_signal_handlers_disconnect_by_func (child_monitor, child_volume_added, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_volume_removed, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_volume_changed, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_mount_added, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_mount_removed, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_mount_pre_unmount, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_mount_changed, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_drive_connected, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_drive_disconnected, union_monitor); g_signal_handlers_disconnect_by_func (child_monitor, child_drive_changed, union_monitor); } /* Note: This compares in reverse order. Higher prio -> sort first */ static gint compare_monitor_type (gconstpointer a, gconstpointer b, gpointer user_data) { GType a_type, b_type; char *a_name, *b_name; int a_prio, b_prio; gint res; const char *use_this_monitor; GQuark private_q, name_q; private_q = g_quark_from_static_string ("gio-prio"); name_q = g_quark_from_static_string ("gio-name"); use_this_monitor = user_data; a_type = *(GType *)a; b_type = *(GType *)b; a_prio = GPOINTER_TO_INT (g_type_get_qdata (a_type, private_q)); a_name = g_type_get_qdata (a_type, name_q); b_prio = GPOINTER_TO_INT (g_type_get_qdata (b_type, private_q)); b_name = g_type_get_qdata (b_type, name_q); if (a_type == b_type) res = 0; else if (use_this_monitor != NULL && strcmp (a_name, use_this_monitor) == 0) res = -1; else if (use_this_monitor != NULL && strcmp (b_name, use_this_monitor) == 0) res = 1; else res = b_prio - a_prio; return res; } static GType get_default_native_class (gpointer data) { GNativeVolumeMonitorClass *klass, *native_class, **native_class_out; GType *monitors; guint n_monitors; const char *use_this; int i; native_class_out = data; use_this = g_getenv ("GIO_USE_VOLUME_MONITOR"); /* Ensure vfs in modules loaded */ _g_io_modules_ensure_loaded (); monitors = g_type_children (G_TYPE_NATIVE_VOLUME_MONITOR, &n_monitors); g_qsort_with_data (monitors, n_monitors, sizeof (GType), compare_monitor_type, (gpointer)use_this); native_class = NULL; for (i = 0; i < n_monitors; i++) { klass = g_type_class_ref (monitors[i]); if (G_VOLUME_MONITOR_CLASS (klass)->is_supported()) { native_class = klass; break; } else g_type_class_unref (klass); } g_free (monitors); if (native_class) { *native_class_out = native_class; return G_TYPE_FROM_CLASS (native_class); } else return G_TYPE_INVALID; } /* We return the class, with a ref taken. * This way we avoid unloading the class/module * between selecting the type and creating the * instance on the first call. */ static GNativeVolumeMonitorClass * get_native_class () { static GOnce once_init = G_ONCE_INIT; GTypeClass *type_class; type_class = NULL; g_once (&once_init, (GThreadFunc)get_default_native_class, &type_class); if (type_class == NULL && once_init.retval != G_TYPE_INVALID) type_class = g_type_class_ref ((GType)once_init.retval); return (GNativeVolumeMonitorClass *)type_class; } static void g_union_volume_monitor_init (GUnionVolumeMonitor *union_monitor) { GVolumeMonitor *monitor; GType *monitors; guint n_monitors; GNativeVolumeMonitorClass *native_class; GVolumeMonitorClass *klass; int i; native_class = get_native_class (); if (native_class != NULL) { monitor = g_object_new (G_TYPE_FROM_CLASS (native_class), NULL); g_union_volume_monitor_add_monitor (union_monitor, monitor); g_object_unref (monitor); g_type_class_unref (native_class); } monitors = g_type_children (G_TYPE_VOLUME_MONITOR, &n_monitors); for (i = 0; i < n_monitors; i++) { if (monitors[i] == G_TYPE_UNION_VOLUME_MONITOR || g_type_is_a (monitors[i], G_TYPE_NATIVE_VOLUME_MONITOR)) continue; klass = g_type_class_ref (monitors[i]); if (klass->is_supported == NULL || klass->is_supported()) { monitor = g_object_new (monitors[i], NULL); g_union_volume_monitor_add_monitor (union_monitor, monitor); g_object_unref (monitor); } g_type_class_unref (klass); } g_free (monitors); } static GUnionVolumeMonitor * g_union_volume_monitor_new (void) { GUnionVolumeMonitor *monitor; monitor = g_object_new (G_TYPE_UNION_VOLUME_MONITOR, NULL); return monitor; } /** * g_volume_monitor_get: * * Gets the volume monitor used by gio. * * Returns: a reference to the #GVolumeMonitor used by gio. Call * g_object_unref() when done with it. **/ GVolumeMonitor * g_volume_monitor_get (void) { GVolumeMonitor *vm; G_LOCK (the_volume_monitor); if (the_volume_monitor) vm = G_VOLUME_MONITOR (g_object_ref (the_volume_monitor)); else { the_volume_monitor = g_union_volume_monitor_new (); vm = G_VOLUME_MONITOR (the_volume_monitor); } G_UNLOCK (the_volume_monitor); return vm; } /** * _g_mount_get_for_mount_path: * @mountpoint: a string. * @cancellable: a #GCancellable, or %NULL * * Returns: a #GMount for given @mount_path or %NULL. **/ GMount * _g_mount_get_for_mount_path (const char *mount_path, GCancellable *cancellable) { GNativeVolumeMonitorClass *klass; GMount *mount; klass = get_native_class (); if (klass == NULL) return NULL; mount = NULL; if (klass->get_mount_for_mount_path) { G_LOCK (the_volume_monitor); mount = klass->get_mount_for_mount_path (mount_path, cancellable); G_UNLOCK (the_volume_monitor); } /* TODO: How do we know this succeeded? Keep in mind that the native * volume monitor may fail (e.g. not being able to connect to * hald). Is the get_mount_for_mount_path() method allowed to * return NULL? Seems like it is ... probably the method needs * to take a boolean and write if it succeeds or not.. Messy. * Very messy. */ g_type_class_unref (klass); return mount; } /** * g_volume_monitor_adopt_orphan_mount: * @mount: a #GMount object to find a parent for * * This function should be called by any #GVolumeMonitor * implementation when a new #GMount object is created that is not * associated with a #GVolume object. It must be called just before * emitting the @mount_added signal. * * If the return value is not %NULL, the caller must associate the * returned #GVolume object with the #GMount. This involves returning * it in it's g_mount_get_volume() implementation. The caller must * also listen for the "removed" signal on the returned object * and give up it's reference when handling that signal * * Similary, if implementing g_volume_monitor_adopt_orphan_mount(), * the implementor must take a reference to @mount and return it in * it's g_volume_get_mount() implemented. Also, the implementor must * listen for the "unmounted" signal on @mount and give up it's * reference upon handling that signal. * * There are two main use cases for this function. * * One is when implementing a user space file system driver that reads * blocks of a block device that is already represented by the native * volume monitor (for example a CD Audio file system driver). Such * a driver will generate it's own #GMount object that needs to be * assoicated with the #GVolume object that represents the volume. * * The other is for implementing a #GVolumeMonitor whose sole purpose * is to return #GVolume objects representing entries in the users * "favorite servers" list or similar. * * Returns: the #GVolume object that is the parent for @mount or %NULL * if no wants to adopt the #GMount. */ GVolume * g_volume_monitor_adopt_orphan_mount (GMount *mount) { GVolumeMonitor *child_monitor; GVolumeMonitorClass *child_monitor_class; GVolume *volume; GList *l; g_return_val_if_fail (mount != NULL, NULL); if (the_volume_monitor == NULL) return NULL; volume = NULL; /* TODO: nasty locking issues because current VM's don't emit signals in idle */ /*G_LOCK (the_volume_monitor);*/ for (l = the_volume_monitor->monitors; l != NULL; l = l->next) { child_monitor = l->data; child_monitor_class = G_VOLUME_MONITOR_GET_CLASS (child_monitor); if (child_monitor_class->adopt_orphan_mount != NULL) { volume = child_monitor_class->adopt_orphan_mount (mount); if (volume != NULL) break; } } /*G_UNLOCK (the_volume_monitor);*/ return volume; } #define __G_UNION_VOLUME_MONITOR_C__ #include "gioaliasdef.c"