mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-06 10:00:40 +03:00
9048565093
related to config settings: obtain_device_info_from_udev (controls if lvm gets a list of devices from readdir /dev or from libudev) external_device_info_source (controls if lvm asks libudev for device information) . Make the obtain_device_list_from_udev setting affect only the choice of readdir /dev vs libudev. The setting no longer controls if udev is used for device type checks. . Change obtain_device_list_from_udev default to 0. This helps avoid boot timeouts due to slow libudev queries, avoids reported failures from udev_enumerate_scan_devices, and avoids delays from "device not initialized in udev database" errors. Even without errors, for a system booting with 1024 PVs, lvm2-pvscan times improve from about 100 sec to 15 sec, and the pvscan command from about 64 sec to about 4 sec. . For external_device_info_source="none", remove all libudev device info queries, and use only lvm native device info. . For external_device_info_source="udev", first check lvm native device info, then check libudev info. . Remove sleep/retry loop when attempting libudev queries for device info. udev info will simply be skipped if it's not immediately available. . Only set up a libdev connection if it will be used by obtain_device_list_from_udev/external_device_info_source. . For native multipath component detection, use /etc/multipath/wwids. If a device has a wwid matching an entry in the wwids file, then it's considered a multipath component. This is necessary to natively detect multipath components when the mpath device is not set up.
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 2011 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 "base/memory/zalloc.h"
|
|
#include "lib/misc/lib.h"
|
|
#include "lib/filters/filter.h"
|
|
#include "lib/activate/activate.h"
|
|
#include "lib/commands/toolcontext.h"
|
|
|
|
#ifdef __linux__
|
|
|
|
#include <dirent.h>
|
|
|
|
static int _ignore_mpath_component(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
|
|
{
|
|
dev->filtered_flags &= ~DEV_FILTERED_MPATH_COMPONENT;
|
|
|
|
if (dev_is_mpath_component(cmd, dev)) {
|
|
log_debug_devs("%s: Skipping mpath component device", dev_name(dev));
|
|
dev->filtered_flags |= DEV_FILTERED_MPATH_COMPONENT;
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void _destroy(struct dev_filter *f)
|
|
{
|
|
if (f->use_count)
|
|
log_error(INTERNAL_ERROR "Destroying mpath filter while in use %u times.", f->use_count);
|
|
}
|
|
|
|
struct dev_filter *mpath_filter_create(struct dev_types *dt)
|
|
{
|
|
struct dev_filter *f;
|
|
const char *sysfs_dir = dm_sysfs_dir();
|
|
|
|
if (!*sysfs_dir) {
|
|
log_verbose("No proc filesystem found: skipping multipath filter");
|
|
return NULL;
|
|
}
|
|
|
|
if (!(f = zalloc(sizeof(*f)))) {
|
|
log_error("mpath filter allocation failed");
|
|
return NULL;
|
|
}
|
|
|
|
f->passes_filter = _ignore_mpath_component;
|
|
f->destroy = _destroy;
|
|
f->use_count = 0;
|
|
f->name = "mpath";
|
|
|
|
log_debug_devs("mpath filter initialised.");
|
|
|
|
return f;
|
|
}
|
|
|
|
#else
|
|
|
|
struct dev_filter *mpath_filter_create(struct dev_types *dt)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|