mirror of
git://sourceware.org/git/lvm2.git
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100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/*
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* Copyright (C) 2011 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "base/memory/zalloc.h"
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#include "lib/misc/lib.h"
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#include "lib/filters/filter.h"
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#include "lib/device/device_id.h"
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#ifdef __linux__
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#include <dirent.h>
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static int _lvmdevices_update_msg;
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static int _ignore_mpath_component(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
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{
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dev_t mpath_devno = 0;
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dev->filtered_flags &= ~DEV_FILTERED_MPATH_COMPONENT;
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if (dev_is_mpath_component(cmd, dev, &mpath_devno)) {
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log_debug_devs("%s: Skipping mpath component device", dev_name(dev));
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dev->filtered_flags |= DEV_FILTERED_MPATH_COMPONENT;
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/*
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* Warn about misconfigure where an mpath component is
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* in the devices file, but its mpath device is not.
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*/
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if ((dev->flags & DEV_MATCHED_USE_ID) && mpath_devno) {
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if (!get_du_for_devno(cmd, mpath_devno)) {
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struct device *mpath_dev = dev_cache_get_by_devt(cmd, mpath_devno);
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log_warn("WARNING: devices file is missing %s (%u:%u) using multipath component %s.",
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mpath_dev ? dev_name(mpath_dev) : "unknown",
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MAJOR(mpath_devno), MINOR(mpath_devno), dev_name(dev));
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if (!_lvmdevices_update_msg && strcmp(get_cmd_name(), "lvmdevices")) {
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log_warn("See lvmdevices --update for devices file update.");
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_lvmdevices_update_msg = 1;
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}
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}
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}
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return 0;
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}
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return 1;
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}
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static void _destroy(struct dev_filter *f)
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{
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if (f->use_count)
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log_error(INTERNAL_ERROR "Destroying mpath filter while in use %u times.", f->use_count);
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free(f);
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}
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struct dev_filter *mpath_filter_create(struct dev_types *dt)
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{
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struct dev_filter *f;
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const char *sysfs_dir = dm_sysfs_dir();
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if (!*sysfs_dir) {
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log_verbose("No proc filesystem found: skipping multipath filter");
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return NULL;
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}
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if (!(f = zalloc(sizeof(*f)))) {
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log_error("mpath filter allocation failed");
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return NULL;
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}
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f->passes_filter = _ignore_mpath_component;
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f->destroy = _destroy;
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f->use_count = 0;
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f->name = "mpath";
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log_debug_devs("mpath filter initialised.");
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return f;
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}
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#else
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struct dev_filter *mpath_filter_create(struct dev_types *dt)
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{
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return NULL;
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}
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#endif
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