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lvm2/lib/misc/lvm-globals.c
Peter Rajnoha edcda01a1e Obtain device list from udev by default if LVM2 is compiled with udev support.
Also, add a new 'obtain_device_list_from_udev' setting to lvm.conf with which
we can turn this feature on or off if needed.

If set, the cache of block device nodes with all associated symlinks
will be constructed out of the existing udev database content.
This avoids using and opening any inapplicable non-block devices or
subdirectories found in the device directory. This setting is applied
to udev-managed device directory only, other directories will be scanned
fully. LVM2 needs to be compiled with udev support for this setting to
take effect. N.B. Any device node or symlink not managed by udev in
udev directory will be ignored with this setting on.
2011-04-22 12:05:32 +00:00

273 lines
4.9 KiB
C

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include "device.h"
#include "memlock.h"
#include "lvm-string.h"
#include "lvm-file.h"
#include "defaults.h"
#include "metadata-exported.h"
#include <stdarg.h>
static int _verbose_level = VERBOSE_BASE_LEVEL;
static int _test = 0;
static int _md_filtering = 0;
static int _pvmove = 0;
static int _full_scan_done = 0; /* Restrict to one full scan during each cmd */
static int _obtain_device_list_from_udev = DEFAULT_OBTAIN_DEVICE_LIST_FROM_UDEV;
static int _trust_cache = 0; /* Don't scan when incomplete VGs encountered */
static int _debug_level = 0;
static int _log_cmd_name = 0;
static int _ignorelockingfailure = 0;
static int _security_level = SECURITY_LEVEL;
static char _cmd_name[30] = "";
static int _mirror_in_sync = 0;
static int _dmeventd_monitor = DEFAULT_DMEVENTD_MONITOR;
static int _background_polling = DEFAULT_BACKGROUND_POLLING;
static int _ignore_suspended_devices = 0;
static int _error_message_produced = 0;
static unsigned _is_static = 0;
static int _udev_checking = 1;
static char _sysfs_dir_path[PATH_MAX] = "";
static int _dev_disable_after_error_count = DEFAULT_DISABLE_AFTER_ERROR_COUNT;
static uint64_t _pv_min_size = (DEFAULT_PV_MIN_SIZE_KB * 1024L >> SECTOR_SHIFT);
void init_verbose(int level)
{
_verbose_level = level;
}
void init_test(int level)
{
if (!_test && level)
log_print("Test mode: Metadata will NOT be updated and volumes will not be (de)activated.");
_test = level;
}
void init_md_filtering(int level)
{
_md_filtering = level;
}
void init_pvmove(int level)
{
_pvmove = level;
}
void init_full_scan_done(int level)
{
_full_scan_done = level;
}
void init_obtain_device_list_from_udev(int device_list_from_udev)
{
_obtain_device_list_from_udev = device_list_from_udev;
}
void init_trust_cache(int trustcache)
{
_trust_cache = trustcache;
}
void init_ignorelockingfailure(int level)
{
_ignorelockingfailure = level;
}
void init_security_level(int level)
{
_security_level = level;
}
void init_mirror_in_sync(int in_sync)
{
_mirror_in_sync = in_sync;
}
void init_dmeventd_monitor(int reg)
{
_dmeventd_monitor = reg;
}
void init_background_polling(int polling)
{
_background_polling = polling;
}
void init_ignore_suspended_devices(int ignore)
{
_ignore_suspended_devices = ignore;
}
void init_cmd_name(int status)
{
_log_cmd_name = status;
}
void init_is_static(unsigned value)
{
_is_static = value;
}
void init_udev_checking(int checking)
{
if ((_udev_checking = checking))
log_debug("LVM udev checking enabled");
else
log_debug("LVM udev checking disabled");
}
void init_dev_disable_after_error_count(int value)
{
_dev_disable_after_error_count = value;
}
void init_pv_min_size(uint64_t sectors)
{
_pv_min_size = sectors;
}
void set_cmd_name(const char *cmd)
{
strncpy(_cmd_name, cmd, sizeof(_cmd_name));
_cmd_name[sizeof(_cmd_name) - 1] = '\0';
}
void set_sysfs_dir_path(const char *path)
{
strncpy(_sysfs_dir_path, path, sizeof(_sysfs_dir_path));
_sysfs_dir_path[sizeof(_sysfs_dir_path) - 1] = '\0';
}
const char *log_command_name(void)
{
if (!_log_cmd_name)
return "";
return _cmd_name;
}
void init_error_message_produced(int value)
{
_error_message_produced = value;
}
int error_message_produced(void)
{
return _error_message_produced;
}
int test_mode(void)
{
return _test;
}
int md_filtering(void)
{
return _md_filtering;
}
int pvmove_mode(void)
{
return _pvmove;
}
int full_scan_done(void)
{
return _full_scan_done;
}
int obtain_device_list_from_udev()
{
return _obtain_device_list_from_udev;
}
int trust_cache(void)
{
return _trust_cache;
}
int background_polling(void)
{
return _background_polling;
}
int ignorelockingfailure(void)
{
return _ignorelockingfailure;
}
int security_level(void)
{
return _security_level;
}
int mirror_in_sync(void)
{
return _mirror_in_sync;
}
int dmeventd_monitor_mode(void)
{
return _dmeventd_monitor;
}
int ignore_suspended_devices(void)
{
return _ignore_suspended_devices;
}
void init_debug(int level)
{
_debug_level = level;
}
int verbose_level(void)
{
return _verbose_level;
}
int debug_level(void)
{
return _debug_level;
}
unsigned is_static(void)
{
return _is_static;
}
int udev_checking(void)
{
return _udev_checking;
}
const char *sysfs_dir_path(void)
{
return _sysfs_dir_path;
}
int dev_disable_after_error_count(void)
{
return _dev_disable_after_error_count;
}
uint64_t pv_min_size(void)
{
return _pv_min_size;
}