mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
100 lines
2.6 KiB
C
100 lines
2.6 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/device/device_id.h"
|
|
|
|
#ifdef __linux__
|
|
|
|
#include <dirent.h>
|
|
|
|
static int _lvmdevices_update_msg;
|
|
|
|
static int _ignore_mpath_component(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
|
|
{
|
|
dev_t mpath_devno = 0;
|
|
|
|
dev->filtered_flags &= ~DEV_FILTERED_MPATH_COMPONENT;
|
|
|
|
if (dev_is_mpath_component(cmd, dev, &mpath_devno)) {
|
|
log_debug_devs("%s: Skipping mpath component device", dev_name(dev));
|
|
dev->filtered_flags |= DEV_FILTERED_MPATH_COMPONENT;
|
|
|
|
/*
|
|
* Warn about misconfig where an mpath component is
|
|
* in the devices file, but its mpath device is not.
|
|
*/
|
|
if ((dev->flags & DEV_MATCHED_USE_ID) && mpath_devno) {
|
|
if (!get_du_for_devno(cmd, mpath_devno)) {
|
|
struct device *mpath_dev = dev_cache_get_by_devt(cmd, mpath_devno);
|
|
log_warn("WARNING: devices file is missing %s (%d:%d) using multipath component %s.",
|
|
mpath_dev ? dev_name(mpath_dev) : "unknown",
|
|
(int)MAJOR(mpath_devno), (int)MINOR(mpath_devno), dev_name(dev));
|
|
if (!_lvmdevices_update_msg && strcmp(get_cmd_name(), "lvmdevices")) {
|
|
log_warn("See lvmdevices --update for devices file update.");
|
|
_lvmdevices_update_msg = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
free(f);
|
|
}
|
|
|
|
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
|