blob: dd6a379ad8d622395ce62ec92f38638b9feca26e [file] [log] [blame]
* Copyright (C) 2011-2012 Red Hat, Inc.
* This file is part of LVM2.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#include "daemon-client.h"
#define LVMETAD_SOCKET DEFAULT_RUN_DIR "/lvmetad.socket"
#define LVMETAD_TOKEN_UPDATE_IN_PROGRESS "update in progress"
struct volume_group;
/* Different types of replies we may get from lvmetad. */
typedef struct {
daemon_reply r;
const char **uuids; /* NULL terminated array */
} lvmetad_uuidlist;
typedef struct {
daemon_reply r;
struct dm_config_tree *cft;
} lvmetad_vg;
/* Get a list of VG UUIDs that match a given VG name. */
lvmetad_uuidlist lvmetad_lookup_vgname(daemon_handle h, const char *name);
/* Get the metadata of a single VG, identified by UUID. */
lvmetad_vg lvmetad_get_vg(daemon_handle h, const char *uuid);
* Add and remove PVs on demand. Udev-driven systems will use this interface
* instead of scanning.
daemon_reply lvmetad_add_pv(daemon_handle h, const char *pv_uuid, const char *mda_content);
daemon_reply lvmetad_remove_pv(daemon_handle h, const char *pv_uuid);
/* Trigger a full disk scan, throwing away all caches. XXX do we eventually want
* this? Probably not yet, anyway.
* daemon_reply lvmetad_rescan(daemon_handle h);
* Update the version of metadata of a volume group. The VG has to be locked for
* writing for this, and the VG metadata here has to match whatever has been
* written to the disk (under this lock). This initially avoids the requirement
* for lvmetad to write to disk (in later revisions, lvmetad_supersede_vg may
* also do the writing, or we probably add another function to do that).
daemon_reply lvmetad_supersede_vg(daemon_handle h, struct volume_group *vg);
/* Wrappers to open/close connection */
static inline daemon_handle lvmetad_open(const char *socket)
daemon_info lvmetad_info = {
.path = "lvmetad",
.socket = socket ?: LVMETAD_SOCKET,
.protocol = "lvmetad",
.protocol_version = 1,
.autostart = 0
return daemon_open(lvmetad_info);
static inline void lvmetad_close(daemon_handle h)
return daemon_close(h);