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lvm2/tools/vgscan.c
David Teigland a8319e62c0 vgscan: add --notifydbus to send a notification
This command option can be used to trigger a D-Bus
notification independent of the usual notifications
that are sent from other commands as an effect of
changes to PV/VG/LV state.  If lvm is not built with
dbus notification support or if notify_dbus is disabled
in the config, this command will exit with an error.
2016-03-07 10:50:45 -06:00

92 lines
2.4 KiB
C

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* 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 "tools.h"
static int vgscan_single(struct cmd_context *cmd, const char *vg_name,
struct volume_group *vg,
struct processing_handle *handle __attribute__((unused)))
{
log_print_unless_silent("Found %svolume group \"%s\" using metadata type %s",
vg_is_exported(vg) ? "exported " : "", vg_name,
vg->fid->fmt->name);
check_current_backup(vg);
return ECMD_PROCESSED;
}
int vgscan(struct cmd_context *cmd, int argc, char **argv)
{
int maxret, ret;
if (argc) {
log_error("Too many parameters on command line");
return EINVALID_CMD_LINE;
}
if (arg_is_set(cmd, notifydbus_ARG)) {
if (!lvmnotify_is_supported()) {
log_error("Cannot notify dbus: lvm is not built with dbus support.");
return ECMD_FAILED;
}
if (!find_config_tree_bool(cmd, global_notify_dbus_CFG, NULL)) {
log_error("Cannot notify dbus: notify_dbus is disabled in lvm config.");
return ECMD_FAILED;
}
set_pv_notify(cmd);
set_vg_notify(cmd);
set_lv_notify(cmd);
return ECMD_PROCESSED;
}
if (!lock_vol(cmd, VG_GLOBAL, LCK_VG_WRITE, NULL)) {
log_error("Unable to obtain global lock.");
return ECMD_FAILED;
}
if (cmd->filter->wipe)
cmd->filter->wipe(cmd->filter);
lvmcache_destroy(cmd, 1, 0);
if (arg_count(cmd, cache_long_ARG)) {
cmd->include_foreign_vgs = 1;
if (lvmetad_active()) {
if (!lvmetad_pvscan_all_devs(cmd, NULL))
return ECMD_FAILED;
}
else {
log_error("Cannot proceed since lvmetad is not active.");
unlock_vg(cmd, VG_GLOBAL);
return ECMD_FAILED;
}
}
log_print_unless_silent("Reading all physical volumes. This may take a while...");
maxret = process_each_vg(cmd, argc, argv, NULL, 0, NULL,
&vgscan_single);
if (arg_count(cmd, mknodes_ARG)) {
ret = vgmknodes(cmd, argc, argv);
if (ret > maxret)
maxret = ret;
}
unlock_vg(cmd, VG_GLOBAL);
return maxret;
}