Blame libvirt-gobject/libvirt-gobject-domain-disk.c

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/*
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 * libvirt-gobject-domain-disk.c: libvirt gobject integration
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 *
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 * Copyright (C) 2011 Red Hat, Inc.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library. If not, see
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 * <http://www.gnu.org/licenses/>.
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 *
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 * Author: Marc-André Lureau <marcandre.lureau@redhat.com>
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 */
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#include <config.h>
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#include <libvirt/virterror.h>
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#include <string.h>
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#include "libvirt-glib/libvirt-glib.h"
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#include "libvirt-gobject/libvirt-gobject.h"
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#include "libvirt-gobject-compat.h"
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#include "libvirt-gobject/libvirt-gobject-domain-device-private.h"
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#define GVIR_DOMAIN_DISK_GET_PRIVATE(obj)                         \
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        (G_TYPE_INSTANCE_GET_PRIVATE((obj), GVIR_TYPE_DOMAIN_DISK, GVirDomainDiskPrivate))
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struct _GVirDomainDiskPrivate
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{
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    gboolean unused;
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};
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G_DEFINE_TYPE_WITH_PRIVATE(GVirDomainDisk, gvir_domain_disk, GVIR_TYPE_DOMAIN_DEVICE);
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#define GVIR_DOMAIN_DISK_ERROR gvir_domain_disk_error_quark()
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static GQuark
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gvir_domain_disk_error_quark(void)
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{
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    return g_quark_from_static_string("gvir-domain-disk");
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}
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static void gvir_domain_disk_class_init(GVirDomainDiskClass *klass G_GNUC_UNUSED)
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{
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}
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static void gvir_domain_disk_init(GVirDomainDisk *self)
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{
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    self->priv = GVIR_DOMAIN_DISK_GET_PRIVATE(self);
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}
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static GVirDomainDiskStats *
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gvir_domain_disk_stats_copy(GVirDomainDiskStats *stats)
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{
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    return g_slice_dup(GVirDomainDiskStats, stats);
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}
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static void
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gvir_domain_disk_stats_free(GVirDomainDiskStats *stats)
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{
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    g_slice_free(GVirDomainDiskStats, stats);
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}
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G_DEFINE_BOXED_TYPE(GVirDomainDiskStats, gvir_domain_disk_stats,
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                    gvir_domain_disk_stats_copy, gvir_domain_disk_stats_free)
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static const gchar *gvir_domain_disk_get_path(GVirDomainDisk *self)
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{
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    GVirConfigDomainDevice *config;
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    const gchar *path;
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    config = gvir_domain_device_get_config(GVIR_DOMAIN_DEVICE(self));
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    path = gvir_config_domain_disk_get_target_dev(GVIR_CONFIG_DOMAIN_DISK(config));
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    g_object_unref(config);
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    return path;
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}
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/**
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 * gvir_domain_disk_get_stats:
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 * @self: the domain disk
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 * @err: an error
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 *
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 * This function returns network disk stats. Individual fields
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 * within the stats structure may be returned as -1, which indicates
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 * that the hypervisor does not support that particular statistic.
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 *
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 * Returns: (transfer full): the stats or %NULL in case of error.The
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 * returned object should be unreffed with g_object_unref() when no longer
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 * needed.
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 **/
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GVirDomainDiskStats *gvir_domain_disk_get_stats(GVirDomainDisk *self, GError **err)
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{
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    GVirDomainDiskStats *ret = NULL;
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    virDomainBlockStatsStruct stats;
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    virDomainPtr handle;
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    const gchar *path;
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    g_return_val_if_fail(GVIR_IS_DOMAIN_DISK(self), NULL);
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    g_return_val_if_fail((err == NULL) || (*err == NULL), NULL);
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    handle = gvir_domain_device_get_domain_handle(GVIR_DOMAIN_DEVICE(self));
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    path = gvir_domain_disk_get_path (self);
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    if (virDomainBlockStats(handle, path, &stats, sizeof (stats)) < 0) {
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        gvir_set_error_literal(err, GVIR_DOMAIN_DISK_ERROR,
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                               0,
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                               "Unable to get domain disk stats");
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        goto end;
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    }
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    ret = g_slice_new(GVirDomainDiskStats);
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    ret->rd_req = stats.rd_req;
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    ret->rd_bytes = stats.rd_bytes;
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    ret->wr_req = stats.wr_req;
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    ret->wr_bytes = stats.wr_bytes;
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    ret->errs = stats.errs;
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end:
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    virDomainFree(handle);
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    return ret;
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}
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/**
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 * gvir_domain_disk_resize:
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 * @self: the domain disk
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 * @size: new size of the block image in kilobytes
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 * @flags: flags, currently unused. Pass '0'.
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 * @err: placeholder for an error, or NULL
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 *
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 * This function resize the disk of a running domain.
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 *
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 * Returns: TRUE if size was successfully changed, FALSE otherwise.
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 **/
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gboolean gvir_domain_disk_resize(GVirDomainDisk *self,
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                                 guint64 size,
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                                 guint flags,
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                                 GError **err)
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{
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    gboolean ret = FALSE;
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    virDomainPtr handle;
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    const gchar *path;
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    g_return_val_if_fail(GVIR_IS_DOMAIN_DISK(self), FALSE);
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    g_return_val_if_fail(err == NULL || *err == NULL, FALSE);
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    handle = gvir_domain_device_get_domain_handle(GVIR_DOMAIN_DEVICE(self));
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    path = gvir_domain_disk_get_path (self);
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    if (virDomainBlockResize(handle, path, size, flags) < 0) {
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        gvir_set_error_literal(err, GVIR_DOMAIN_DISK_ERROR,
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                               0,
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                               "Failed to resize domain disk");
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        goto end;
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    }
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    ret = TRUE;
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end:
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    virDomainFree(handle);
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    return ret;
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}